Java课程设计之学习成绩管理系统

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package System;import java.awt.*;import java.awt.event.*;import java.io.*;import javax.swing.*;import javax.swing.table.AbstractTableModel;import javax.swing.table.DefaultTableModel;import javax.swing.table.TableCellRenderer;import javax.swing.table.TableColumn;public class main extends JFrame implements ActionListener, MouseListener{ String FileName = "D:\\Jworkspace\\学生管理系统\\src\\information.txt"private JMenuBar typeMenu; private JMenu file, display, edit, help, sort,delete,alter,add,subject,search,ratio,avg,pie,histogram; private JMenuItem seeItem,addClass,addStudent,pageone,exit,alterName,alterID,                   deleteID,deleteName,deleteClass,deleteSex,deleteAge,deleteCollage,                   searchID,searchName,searchClass,searchSex,searchAge,searchCollage,                    ID, age, software,math, system, java,                   pieMath,pieSystem,pieJava,pieSoftware,                   histogramMath,histogramSystem,histogramSoftware,histogramJava,                   totalGrade,helpItem,avgMath,avgJava,avgSystem,avgSoftware; private CardLayout cardl; private TableColumn col1,col2,col3,col4,col5,col6,col7,col8,col9,col10; private JPanel card,jpSee,jpAddStudent,jpAlterByID,jpAlterByName, jpMain,jpSearch,jphelp; private JTable jtable; private JLabel jl,jlAdd1, jlAdd2, jlAdd3, jlAdd4, jlAdd5, jlAdd6, jlAdd7, jlAdd8, jlAdd9, jlAdd10, jlAdd11, jlAdd12,jlAdd13,                 jlMain1, jlMain2,                jlAlter1,jlAlter2,jlAlter3,jlAlter4,jlAlter5,jlAlter6,jlAlter7; private JTextField jtAddClass, jtAddID, jtAddName, jtAddAge,jtAddCollage, jtAddSoftware, jtAddMath, jtAddSystem, jtAddJava,                    jtAlterID,jtAlterName,jtAlterAge,jtAlterClass,jtAlterCollage,jtAlterMath,jtAlterSoftware,jtAlterJava,jtAlterSystem,                    jtAlterID2,jtAlterName2,jtAlterAge2,jtAlterClass2,jtAlterCollage2,jtAlterMath2,jtAlterSoftware2,jtAlterJava2,jtAlterSystem2; private JRadioButton jr_man, jr_woman,jr_man2, jr_woman2; private ButtonGroup sexgroup,sexgroup2; private JButton jbAddSure,jbAlterSure,jbAlterSure2; private int row; private String[] collage = { "信息学院", "信电学院", "土建学院", "地质学院", "经管学院", "外国语学院", "化工学院" }; private String[] class1 = { "计算机09-1", "计算机09-2", "计算机09-3", "网络", "软件", "电科" }; private JScrollPane js;    private String[][] student = new String [100][25];; public main() {  Container c = getContentPane();  c.setLayout(null);  typeMenu = new JMenuBar();// 应用程序菜单的容器  setJMenuBar(typeMenu);  //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  // 菜单Display  file = new JMenu("系统");  file.setFont(new Font("宋体", Font.PLAIN, 14));  typeMenu.add(file);  // 菜单Display  display = new JMenu("查看");  display.setFont(new Font("宋体", Font.PLAIN, 14));  typeMenu.add(display);  // 菜单Edit  edit = new JMenu("编辑信息");  edit.setFont(new Font("宋体", Font.PLAIN, 14));  typeMenu.add(edit);  // 菜单Sort  sort = new JMenu("排序");  sort.setFont(new Font("宋体", Font.PLAIN, 14));  typeMenu.add(sort);  //菜单avg  avg = new JMenu("平均分");  avg.setFont(new Font("宋体", Font.PLAIN, 14));  typeMenu.add(avg);  // 菜单ratio  ratio = new JMenu("比例图");  ratio.setFont(new Font("宋体", Font.PLAIN, 14));  typeMenu.add(ratio);  // 菜单Help  help = new JMenu("Help");  help.setFont(new Font("宋体", Font.PLAIN, 14));  typeMenu.add(help);  //Help  helpItem = new JMenuItem("Help");  helpItem.setFont(new Font("宋体", Font.PLAIN, 14));  help.add(helpItem);  helpItem.addActionListener(this);  helpItem.setActionCommand("帮助");  // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  //首页  pageone = new JMenuItem("首页");  pageone.setFont(new Font("宋体", Font.PLAIN, 14));  file.add(pageone);  pageone.addActionListener(this);  pageone.setActionCommand("首页");  file.addSeparator();  //退出  exit = new JMenuItem("退出");  exit.setFont(new Font("宋体", Font.PLAIN, 14));  file.add(exit);  exit.addActionListener(this);  exit.setActionCommand("退出");     //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  //查看  seeItem  = new JMenuItem("查看");  seeItem.setFont(new Font("宋体", Font.PLAIN, 14));  display.add(seeItem);  seeItem.addActionListener(this);  seeItem.setActionCommand("查看");  // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  //删除  delete = new JMenu("删除");  delete.setMnemonic(KeyEvent.VK_D);  delete.setFont(new Font("宋体", Font.PLAIN, 14));  edit.add(delete);  delete.addActionListener(this);  delete.setActionCommand("删除");  edit.addSeparator();  //按学号删除  deleteID = new JMenuItem("按学号删除");  deleteID.setFont(new Font("宋体", Font.PLAIN, 13));  delete.add(deleteID);  deleteID.addActionListener(this);  deleteID.setActionCommand("按学号删除");  delete.addSeparator();  //按姓名删除  deleteName = new JMenuItem("按姓名删除");  deleteName.setFont(new Font("宋体", Font.PLAIN, 13));  delete.add(deleteName);  deleteName.addActionListener(this);  deleteName.setActionCommand("按姓名删除");  delete.addSeparator();  //按学院删除  deleteCollage = new JMenuItem("按学院删除");  deleteCollage.setFont(new Font("宋体", Font.PLAIN, 13));  delete.add(deleteCollage);  deleteCollage.addActionListener(this);  deleteCollage.setActionCommand("按学院删除");  delete.addSeparator();  //按班级删除  deleteClass = new JMenuItem("按班级删除");  deleteClass.setFont(new Font("宋体", Font.PLAIN, 13));  delete.add(deleteClass);  deleteClass.addActionListener(this);  deleteClass.setActionCommand("按班级删除");  delete.addSeparator();  //按性别删除  deleteSex = new JMenuItem("按性别删除");  deleteSex.setFont(new Font("宋体", Font.PLAIN, 13));  delete.add(deleteSex);  deleteSex.addActionListener(this);  deleteSex.setActionCommand("按性别删除");  delete.addSeparator();  //按年龄删除  deleteAge = new JMenuItem("按年龄删除");  deleteAge.setFont(new Font("宋体", Font.PLAIN, 13));  delete.add(deleteAge);  deleteAge.addActionListener(this);  deleteAge.setActionCommand("按年龄删除");  //添加  add = new JMenu("添加");  add.setMnemonic(KeyEvent.VK_A);  add.setFont(new Font("宋体", Font.PLAIN, 14));  edit.add(add);  edit.addSeparator();  add.addActionListener(this);  add.setActionCommand("添加");//  //按学号添加//  addClass = new JMenuItem("添加班级");//  addClass.setFont(new Font("宋体", Font.PLAIN, 13));//  add.add(addClass);//  addClass.addActionListener(this);//  addClass.setActionCommand("添加班级");//  add.addSeparator();  //添加学生  addStudent = new JMenuItem("添加学生");  addStudent.setFont(new Font("宋体", Font.PLAIN, 13));  add.add(addStudent);  addStudent.addActionListener(this);  addStudent.setActionCommand("添加学生");  //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  //修改  alter = new JMenu("修改");  alter.setMnemonic(KeyEvent.VK_A);  alter.setFont(new Font("宋体", Font.PLAIN, 14));  edit.add(alter);  alter.addActionListener(this);  alter.setActionCommand("修改");  edit.addSeparator();  //按学号修改  alterID = new JMenuItem("按学号修改");  alterID.setFont(new Font("宋体", Font.PLAIN, 13));  alter.add(alterID);  alterID.addActionListener(this);  alterID.setActionCommand("按学号修改");  alter.addSeparator();  //按姓名修改  alterName = new JMenuItem("按姓名修改");  alterName.setFont(new Font("宋体", Font.PLAIN, 13));  alter.add(alterName);  alterName.addActionListener(this);  alterName.setActionCommand("按姓名修改");  //查询  search = new JMenu("查询");  search.setFont(new Font("宋体", Font.PLAIN, 14));  edit.add(search);  search.addActionListener(this);  search.setActionCommand("查询");  //按学号查询  searchID = new JMenuItem("按学号查询");  searchID.setFont(new Font("宋体", Font.PLAIN, 13));  search.add(searchID);  searchID.addActionListener(this);  searchID.setActionCommand("按学号查询");  search.addSeparator();  //姓名查询  searchName = new JMenuItem("按姓名查询");  searchName.setFont(new Font("宋体", Font.PLAIN, 13));  search.add(searchName);  searchName.addActionListener(this);  searchName.setActionCommand("按姓名查询");  search.addSeparator();  //按学院查询  searchCollage = new JMenuItem("按学院查询");  searchCollage.setFont(new Font("宋体", Font.PLAIN, 13));  search.add(searchCollage);  searchCollage.addActionListener(this);  searchCollage.setActionCommand("按学院查询");  search.addSeparator();  //按班级查询  searchClass = new JMenuItem("按班级查询");  searchClass.setFont(new Font("宋体", Font.PLAIN, 13));  search.add(searchClass);  searchClass.addActionListener(this);  searchClass.setActionCommand("按班级查询");  search.addSeparator();  //按性别查询  searchSex = new JMenuItem("按性别查询");  searchSex.setFont(new Font("宋体", Font.PLAIN, 13));  search.add(searchSex);  searchSex.addActionListener(this);  searchSex.setActionCommand("按性别查询");  search.addSeparator();  //按年龄查询  searchAge = new JMenuItem("按年龄查询");  searchAge.setFont(new Font("宋体", Font.PLAIN, 13));  search.add(searchAge);  searchAge.addActionListener(this);  searchAge.setActionCommand("按年龄查询");  // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  //排序  //按学号排序  ID = new JMenuItem("按学号排序");  ID.setFont(new Font("宋体", Font.PLAIN, 14));  sort.add(ID);  sort.addSeparator();  ID.addActionListener(this);  ID.setActionCommand("按学号排序");  //按年龄排序  age = new JMenuItem("按年龄排序");  age.setFont(new Font("宋体", Font.PLAIN, 14));  sort.add(age);  sort.addSeparator();  age.addActionListener(this);  age.setActionCommand("按年龄排序");  //按总成绩排序  totalGrade  = new JMenuItem("按总成绩排序");  totalGrade.setFont(new Font("宋体", Font.PLAIN, 14));  sort.add(totalGrade);  sort.addSeparator();  totalGrade.addActionListener(this);  totalGrade.setActionCommand("按总成绩排序");  //按单科成绩排序  subject = new JMenu("按单科成绩排序");  subject.setFont(new Font("宋体", Font.PLAIN, 14));  sort.add(subject);  //按数学排序  math = new JMenuItem("按数学排序");  math.setFont(new Font("宋体", Font.PLAIN, 14));  subject.add(math);  math.addActionListener(this);  math.setActionCommand("按数学排序");  subject.addSeparator();  //按Java排序  java = new JMenuItem("按Java排序");  java.setFont(new Font("宋体", Font.PLAIN, 14));  subject.add(java);  java.addActionListener(this);  java.setActionCommand("按Java排序");  subject.addSeparator();  //按软件工程排序  software = new JMenuItem("按软件工程排序");  software.setFont(new Font("宋体", Font.PLAIN, 14));  subject.add(software);  software.addActionListener(this);  software.setActionCommand("按软件工程排序");  subject.addSeparator();  //按操作系统排序  system = new JMenuItem("按操作系统排序");  system.setFont(new Font("宋体", Font.PLAIN, 14));  subject.add(system);  system.addActionListener(this);  system.setActionCommand("按操作系统排序");  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  //课程平均分  //求数学平均分  avgMath = new JMenuItem("求数学平均分");  avgMath.setFont(new Font("宋体", Font.PLAIN, 14));  avg.add(avgMath);  avgMath.addActionListener(this);  avgMath.setActionCommand("求数学平均分");  avg.addSeparator();  //求Java平均分  avgJava = new JMenuItem("求Java平均分");  avgJava.setFont(new Font("宋体", Font.PLAIN, 14));  avg.add(avgJava);  avgJava.addActionListener(this);  avgJava.setActionCommand("求Java平均分");  avg.addSeparator();  //求软件工程平均分  avgSoftware = new JMenuItem("求软件工程平均分");  avgSoftware.setFont(new Font("宋体", Font.PLAIN, 14));  avg.add(avgSoftware);  avgSoftware.addActionListener(this);  avgSoftware.setActionCommand("求软件工程平均分");  avg.addSeparator();  //求操作系统平均分  avgSystem = new JMenuItem("求操作系统平均分");  avgSystem.setFont(new Font("宋体", Font.PLAIN, 14));  avg.add(avgSystem);  avgSystem.addActionListener(this);  avgSystem.setActionCommand("求操作系统平均分");  //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  //饼形图  pie = new JMenu("饼形图");  pie.setFont(new Font("宋体", Font.PLAIN, 14));  ratio.add(pie);  pie.addActionListener(this);  pie.setActionCommand("饼形图");  ratio.addSeparator();  //Math柱形图  pieMath = new JMenuItem("Math");  pieMath.setFont(new Font("宋体", Font.PLAIN, 14));  pie.add(pieMath);  pieMath.addActionListener(this);  pieMath.setActionCommand("Math饼形图");  pie.addSeparator();  //Java柱形图  pieJava = new JMenuItem("Java");  pieJava.setFont(new Font("宋体", Font.PLAIN, 14));  pie.add(pieJava);  pieJava.addActionListener(this);  pieJava.setActionCommand("Java饼形图");  pie.addSeparator();  //System柱形图  pieSystem = new JMenuItem("System");  pieSystem.setFont(new Font("宋体", Font.PLAIN, 14));  pie.add(pieSystem);  pieSystem.addActionListener(this);  pieSystem.setActionCommand("System饼形图");  pie.addSeparator();  //Software柱形图  pieSoftware = new JMenuItem("Software");  pieSoftware.setFont(new Font("宋体", Font.PLAIN, 14));  pie.add(pieSoftware);  pieSoftware.addActionListener(this);  pieSoftware.setActionCommand("Software饼形图");  //柱形图  histogram = new JMenu("柱形图");  histogram.setFont(new Font("宋体", Font.PLAIN, 14));  ratio.add(histogram);  histogram.addActionListener(this);  histogram.setActionCommand("柱形图");  //Math柱形图  histogramMath = new JMenuItem("Math");  histogramMath.setFont(new Font("宋体", Font.PLAIN, 14));  histogram.add(histogramMath);  histogramMath.addActionListener(this);  histogramMath.setActionCommand("Math柱形图");  histogram.addSeparator();  //Java柱形图  histogramJava = new JMenuItem("Java");  histogramJava.setFont(new Font("宋体", Font.PLAIN, 14));  histogram.add(histogramJava);  histogramJava.addActionListener(this);  histogramJava.setActionCommand("Java柱形图");  histogram.addSeparator();  //System柱形图  histogramSystem = new JMenuItem("System");  histogramSystem.setFont(new Font("宋体", Font.PLAIN, 14));  histogram.add(histogramSystem);  histogramSystem.addActionListener(this);  histogramSystem.setActionCommand("System柱形图");  histogram.addSeparator();  //Software柱形图  histogramSoftware = new JMenuItem("Software");  histogramSoftware.setFont(new Font("宋体", Font.PLAIN, 14));  histogram.add(histogramSoftware);  histogramSoftware.addActionListener(this);  histogramSoftware.setActionCommand("Software柱形图");  //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  cardl = new CardLayout();  card = new JPanel();  card.setBounds(0, 0, 650, 400);  card.setOpaque(false);  card.setLayout(cardl);  jpSearch = new JPanel();  jpMain = new JPanel();  jpAddStudent = new JPanel();  jpAlterByID = new JPanel();  jpAlterByName = new JPanel();  jpSee = new JPanel();  jphelp = new JPanel();      card.add("首页", jpMain);  card.add("按班级查询",jpSearch);  card.add("添加学生", jpAddStudent);  card.add("按姓名修改", jpAlterByName);  card.add("按学号修改", jpAlterByID);  card.add("查看", jpSee);  card.add("帮助", jphelp);  c.add(card);  // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  //首页  jpMain.setLayout(null);  jlMain1 = new JLabel();  jlMain1.setText("欢迎来到学生成绩管理系统");  jlMain1.setBounds(150, 100, 300, 40);  jlMain1.setFont(new Font("宋体", Font.PLAIN, 25));  jlMain1.setForeground(Color.black);  jpMain.add(jlMain1);  jlMain2 = new JLabel();  jlMain2.setText("管理员:xiaosi");  jlMain2.setBounds(230, 150, 300, 40);  jlMain2.setFont(new Font("宋体", Font.PLAIN, 20));  jlMain2.setForeground(Color.black);  jpMain.add(jlMain2);  //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  //帮助  jphelp.setLayout(null);  // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  jpAlterByID.setLayout(null);  //按学号修改  jlAlter1 = new JLabel();  jlAlter1.setText("按学号修改");  jlAlter1.setBounds(200, 20, 170, 20);  jlAlter1.setFont(new Font("宋体", Font.PLAIN, 20));  jpAlterByID.add(jlAlter1);  jlAlter2 = new JLabel();  jlAlter2.setBounds(20, 70, 200, 20);  jlAlter2.setText("*请输入要修改学生的学号:");  jlAlter2.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jlAlter2);  //要修改学生的学号  jtAlterID = new JTextField();  jtAlterID.setBounds(220, 70, 150, 20);  jtAlterID.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jtAlterID);  //修改基本信息  jlAlter2 = new JLabel();  jlAlter2.setBounds(20, 100, 170, 20);  jlAlter2.setText("*修改基本信息*");  jlAlter2.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jlAlter2);  // 修改姓名  jlAlter3 = new JLabel();  jlAlter3.setBounds(80, 140, 50, 20);  jlAlter3.setText("姓名:");  jlAlter3.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jlAlter3);    jtAlterName = new JTextField();  jtAlterName.setBounds(130, 140, 150, 20);  jtAlterName.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jtAlterName);  // 修改年龄  jlAlter4 = new JLabel();  jlAlter4.setBounds(320, 140, 50, 20);  jlAlter4.setText("年龄:");  jlAlter4.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jlAlter4);    jtAlterAge = new JTextField();  jtAlterAge.setBounds(370, 140, 150, 20);  jtAlterAge.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jtAlterAge);    // 修改学院  jlAlter6 = new JLabel();  jlAlter6.setBounds(80, 170, 50, 20);  jlAlter6.setText("学院:");  jlAlter6.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jlAlter6);    jtAlterCollage = new JTextField();  jtAlterCollage.setBounds(130, 170, 150, 20);  jtAlterCollage.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jtAlterCollage);  //修改班级  jlAlter7 = new JLabel();  jlAlter7.setBounds(320, 170, 50, 20);  jlAlter7.setText("班级:");  jlAlter7.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jlAlter7);  jtAlterClass = new JTextField();  jtAlterClass.setBounds(370, 170, 150, 20);  jtAlterClass.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jtAlterClass);  // 修改性别  jlAlter5 = new JLabel();  jlAlter5.setBounds(80, 210, 50, 20);  jlAlter5.setText("性别:");  jlAlter5.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jlAlter5);    jr_man = new JRadioButton();  jr_man.setText("男");  jr_man.setFont(new Font("宋体", Font.PLAIN, 16));  jr_man.setSelected(true);  jr_man.setBounds(130, 210, 50, 20);  jr_woman = new JRadioButton();  jr_woman.setText("女");  jr_woman.setFont(new Font("宋体", Font.PLAIN, 16));  jr_woman.setBounds(180, 210, 50, 20);  sexgroup = new ButtonGroup();  sexgroup.add(jr_man);  sexgroup.add(jr_woman);  jpAlterByID.add(jr_man);  jpAlterByID.add(jr_woman);  // 修改成绩  jlAlter5 = new JLabel();  jlAlter5.setBounds(20, 240, 200, 20);  jlAlter5.setText("*修改单科成绩*");  jlAlter5.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jlAlter5);  // 修改数学  jlAlter5 = new JLabel();  jlAlter5.setBounds(80, 270, 50, 20);  jlAlter5.setText("数学:");  jlAlter5.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jlAlter5);    jtAlterMath = new JTextField();  jtAlterMath.setBounds(130, 270, 150, 20);  jtAlterMath.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jtAlterMath);  //修改软件工程  jlAlter5 = new JLabel();  jlAlter5.setBounds(320, 270, 80, 20);  jlAlter5.setText("软件工程:");  jlAlter5.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jlAlter5);    jtAlterSoftware = new JTextField();  jtAlterSoftware.setBounds(400, 270, 150, 20);  jtAlterSoftware.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jtAlterSoftware);  // 修改Java  jlAlter5 = new JLabel();  jlAlter5.setBounds(80, 300, 50, 20);  jlAlter5.setText("Java:");  jlAlter5.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jlAlter5);    jtAlterJava = new JTextField();  jtAlterJava.setBounds(130, 300, 150, 20);  jtAlterJava.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jtAlterJava);  // 修改操作系统  jlAlter5 = new JLabel();  jlAlter5.setBounds(320, 300, 80, 20);  jlAlter5.setText("操作系统:");  jlAlter5.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jlAlter5);  jtAlterSystem = new JTextField();  jtAlterSystem.setBounds(400, 300, 150, 20);  jtAlterSystem.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByID.add(jtAlterSystem);    jbAlterSure = new JButton();  jbAlterSure.setBounds(500, 325, 50, 20);  jbAlterSure.setIcon(new ImageIcon("pic//tijiao.gif"));  jbAlterSure.addActionListener(this);  jbAlterSure.setActionCommand("按学号修改提交");  jpAlterByID.add(jbAlterSure);    // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  jpAlterByName.setLayout(null);  //按姓名修改  jlAlter1 = new JLabel();  jlAlter1.setText("按姓名修改");  jlAlter1.setBounds(230, 20, 170, 20);  jlAlter1.setFont(new Font("宋体", Font.PLAIN, 20));  jpAlterByName.add(jlAlter1);  jlAlter2 = new JLabel();  jlAlter2.setBounds(20, 70, 200, 20);  jlAlter2.setText("*请输入要修改学生的姓名:");  jlAlter2.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jlAlter2);  //要修改学生的姓名  jtAlterName2 = new JTextField();  jtAlterName2.setBounds(220, 70, 150, 20);  jtAlterName2.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jtAlterName2);  //修改基本信息  jlAlter2 = new JLabel();  jlAlter2.setBounds(20, 100, 170, 20);  jlAlter2.setText("*修改基本信息*");  jlAlter2.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jlAlter2);  // 修改学号  jlAlter3 = new JLabel();  jlAlter3.setBounds(80, 140, 50, 20);  jlAlter3.setText("学号:");  jlAlter3.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jlAlter3);    jtAlterID2 = new JTextField();  jtAlterID2.setBounds(130, 140, 150, 20);  jtAlterID2.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jtAlterID2);  // 修改年龄  jlAlter4 = new JLabel();  jlAlter4.setBounds(320, 140, 50, 20);  jlAlter4.setText("年龄:");  jlAlter4.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jlAlter4);    jtAlterAge2 = new JTextField();  jtAlterAge2.setBounds(370, 140, 150, 20);  jtAlterAge2.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jtAlterAge2);    // 修改学院  jlAlter6 = new JLabel();  jlAlter6.setBounds(80, 170, 50, 20);  jlAlter6.setText("学院:");  jlAlter6.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jlAlter6);    jtAlterCollage2 = new JTextField();  jtAlterCollage2.setBounds(130, 170, 150, 20);  jtAlterCollage2.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jtAlterCollage2);  //修改班级  jlAlter7 = new JLabel();  jlAlter7.setBounds(320, 170, 50, 20);  jlAlter7.setText("班级:");  jlAlter7.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jlAlter7);  jtAlterClass2 = new JTextField();  jtAlterClass2.setBounds(370, 170, 150, 20);  jtAlterClass2.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jtAlterClass2);  // 修改性别  jlAlter5 = new JLabel();  jlAlter5.setBounds(80, 210, 50, 20);  jlAlter5.setText("性别:");  jlAlter5.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jlAlter5);    jr_man2 = new JRadioButton();  jr_man2.setText("男");  jr_man2.setFont(new Font("宋体", Font.PLAIN, 16));  jr_man2.setSelected(true);  jr_man2.setBounds(130, 210, 50, 20);  jr_woman2 = new JRadioButton();  jr_woman2.setText("女");  jr_woman2.setFont(new Font("宋体", Font.PLAIN, 16));  jr_woman2.setBounds(180, 210, 50, 20);  sexgroup2 = new ButtonGroup();  sexgroup2.add(jr_man2);  sexgroup2.add(jr_woman2);  jpAlterByName.add(jr_man2);  jpAlterByName.add(jr_woman2);  // 修改成绩  jlAlter5 = new JLabel();  jlAlter5.setBounds(20, 240, 200, 20);  jlAlter5.setText("*修改单科成绩*");  jlAlter5.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jlAlter5);  // 修改数学  jlAlter5 = new JLabel();  jlAlter5.setBounds(80, 270, 50, 20);  jlAlter5.setText("数学:");  jlAlter5.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jlAlter5);    jtAlterMath2 = new JTextField();  jtAlterMath2.setBounds(130, 270, 150, 20);  jtAlterMath2.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jtAlterMath2);  //修改软件工程  jlAlter5 = new JLabel();  jlAlter5.setBounds(320, 270, 80, 20);  jlAlter5.setText("软件工程:");  jlAlter5.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jlAlter5);    jtAlterSoftware2 = new JTextField();  jtAlterSoftware2.setBounds(400, 270, 150, 20);  jtAlterSoftware2.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jtAlterSoftware2);  // 修改Java  jlAlter5 = new JLabel();  jlAlter5.setBounds(80, 300, 50, 20);  jlAlter5.setText("Java:");  jlAlter5.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jlAlter5);    jtAlterJava2 = new JTextField();  jtAlterJava2.setBounds(130, 300, 150, 20);  jtAlterJava2.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jtAlterJava2);  // 修改操作系统  jlAlter5 = new JLabel();  jlAlter5.setBounds(320, 300, 80, 20);  jlAlter5.setText("操作系统:");  jlAlter5.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jlAlter5);  jtAlterSystem2 = new JTextField();  jtAlterSystem2.setBounds(400, 300, 150, 20);  jtAlterSystem2.setFont(new Font("宋体", Font.PLAIN, 16));  jpAlterByName.add(jtAlterSystem2);    jbAlterSure2 = new JButton();  jbAlterSure2.setBounds(500, 325, 50, 20);  jbAlterSure2.setIcon(new ImageIcon("pic//tijiao.gif"));  jbAlterSure2.addActionListener(this);  jbAlterSure2.setActionCommand("按姓名修改提交");  jpAlterByName.add(jbAlterSure2);  //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  //添加  jpAddStudent.setLayout(null);  jlAdd1 = new JLabel();  jlAdd1.setBounds(200, 20, 200, 20);  jlAdd1.setText("添加学生基本信息");  jlAdd1.setFont(new Font("宋体", Font.PLAIN, 20));  jpAddStudent.add(jlAdd1);  // 添加基本信息  jlAdd2 = new JLabel();  jlAdd2.setBounds(20, 60, 100, 20);  jlAdd2.setText("*基本信息:");  jlAdd2.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jlAdd2);  //添加学号  jlAdd3 = new JLabel();  jlAdd3.setBounds(80, 90, 50, 20);  jlAdd3.setText("学号:");  jlAdd3.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jlAdd3);  jtAddID = new JTextField();  jtAddID.setBounds(130, 90, 150, 20);  jtAddID.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jtAddID);  // 添加姓名  jlAdd4 = new JLabel();  jlAdd4.setBounds(320, 90, 50, 20);  jlAdd4.setText("姓名:");  jlAdd4.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jlAdd4);  jtAddName = new JTextField();  jtAddName.setBounds(370, 90, 150, 20);  jtAddName.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jtAddName);  // 添加年龄  jlAdd5 = new JLabel();  jlAdd5.setBounds(80, 130, 50, 20);  jlAdd5.setText("年龄:");  jlAdd5.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jlAdd5);  jtAddAge = new JTextField();  jtAddAge.setBounds(130, 130, 150, 20);  jtAddAge.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jtAddAge);  // 添加学院  jlAdd12 = new JLabel();  jlAdd12.setBounds(320, 130, 50, 20);  jlAdd12.setText("学院:");  jlAdd12.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jlAdd12);  jtAddCollage = new JTextField();  jtAddCollage.setBounds(370, 130, 150, 20);  jtAddCollage.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jtAddCollage);  // 添加性别  jlAdd6 = new JLabel();  jlAdd6.setBounds(80, 170, 50, 20);  jlAdd6.setText("性别:");  jlAdd6.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jlAdd6);  jr_man = new JRadioButton();  jr_man.setText("男");  jr_man.setFont(new Font("宋体", Font.PLAIN, 16));  jr_man.setSelected(true);  jr_man.setBounds(130, 170, 50, 20);  jr_woman = new JRadioButton();  jr_woman.setText("女");  jr_woman.setFont(new Font("宋体", Font.PLAIN, 16));  jr_woman.setBounds(180, 170, 50, 20);  sexgroup = new ButtonGroup();  sexgroup.add(jr_man);  sexgroup.add(jr_woman);  jpAddStudent.add(jr_man);  jpAddStudent.add(jr_woman);  //添加班级  jlAdd13 = new JLabel();  jlAdd13.setBounds(320, 170, 50, 20);  jlAdd13.setText("班级:");  jlAdd13.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jlAdd13);  jtAddClass = new JTextField();  jtAddClass.setBounds(370, 170, 150, 20);  jtAddClass.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jtAddClass);  // 添加成绩  jlAdd7 = new JLabel();  jlAdd7.setBounds(20, 210, 100, 20);  jlAdd7.setText("*单科成绩:");  jlAdd7.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jlAdd7);  // 添加数学  jlAdd8 = new JLabel();  jlAdd8.setBounds(80, 240, 50, 20);  jlAdd8.setText("数学:");  jlAdd8.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jlAdd8);  jtAddMath = new JTextField();  jtAddMath.setBounds(130, 240, 150, 20);  jtAddMath.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jtAddMath);  // 添加软件工程  jlAdd9 = new JLabel();  jlAdd9.setBounds(320, 240, 80, 20);  jlAdd9.setText("软件工程:");  jlAdd9.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jlAdd9);  jtAddSoftware = new JTextField();  jtAddSoftware.setBounds(400, 240, 150, 20);  jtAddSoftware.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jtAddSoftware);  // 添加Java  jlAdd10 = new JLabel();  jlAdd10.setBounds(80, 280, 50, 20);  jlAdd10.setText("Java:");  jlAdd10.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jlAdd10);  jtAddJava = new JTextField();  jtAddJava.setBounds(130, 280, 150, 20);  jtAddJava.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jtAddJava);  // 添加操作系统  jlAdd11 = new JLabel();  jlAdd11.setBounds(320, 280, 80, 20);  jlAdd11.setText("操作系统:");  jlAdd11.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jlAdd11);  jtAddSystem = new JTextField();  jtAddSystem.setBounds(400, 280, 150, 20);  jtAddSystem.setFont(new Font("宋体", Font.PLAIN, 16));  jpAddStudent.add(jtAddSystem);  jbAddSure = new JButton();  jbAddSure.setBounds(500, 320, 50, 20);  jbAddSure.setIcon(new ImageIcon("pic//tijiao.gif"));  jbAddSure.addActionListener(this);  jbAddSure.setActionCommand("添加提交");  jpAddStudent.add(jbAddSure);  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  //查看  jl = new JLabel();  jl.setBounds(110, 0, 300, 20);  jl.setText("信息表");  jl.setForeground(Color.gray);  jl.setFont(new Font("宋体", Font.PLAIN, 16));  jpSee.add(jl);    MyTableModel Mytable = new MyTableModel();  jtable = new JTable(Mytable);  jtable.setShowGrid(true);  //设置列宽  col1 = jtable.getColumnModel().getColumn(0);  col1.setPreferredWidth(145);  col2 = jtable.getColumnModel().getColumn(1);  col2.setPreferredWidth(80);  col3 = jtable.getColumnModel().getColumn(2);  col3.setPreferredWidth(50);  col4 = jtable.getColumnModel().getColumn(3);  col4.setPreferredWidth(50);  col5 = jtable.getColumnModel().getColumn(4);  col5.setPreferredWidth(100);  col6 = jtable.getColumnModel().getColumn(5);  col6.setPreferredWidth(130);  col7 = jtable.getColumnModel().getColumn(6);  col7.setPreferredWidth(80);  col8 = jtable.getColumnModel().getColumn(7);  col8.setPreferredWidth(80);  col9 = jtable.getColumnModel().getColumn(8);  col9.setPreferredWidth(80);  col10 = jtable.getColumnModel().getColumn(9);  col10.setPreferredWidth(80);  jtable.setPreferredScrollableViewportSize(new Dimension(610, 300));  js = new JScrollPane(jtable);  js.setBounds(30, 20, 590, 350);  jpSee.add(js);     //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  setLocation(400, 150);  setResizable(false);  setSize(650, 400);  setVisible(true);  setTitle("学生成绩管理系统"); }    //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //判断学生是否存在 public Boolean isEixt(String ID, String fileName) {  String str = null;  String[][] student = new String[100][];  FileReader fr;  BufferedReader br;  try  {   fr = new FileReader(fileName);   br = new BufferedReader(fr);   try   {    for (int i = 0; (str = br.readLine()) != null; i++)    {     student[i] = str.split(" ");     if (student[i][0].equals(ID))     {      return true;     }    }   }   catch (IOException e)   {    e.printStackTrace();   }  }  catch (FileNotFoundException e)  {   e.printStackTrace();  }  return false; } //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++    //添加基本信息 public void add(String information, String FileName) {  File file = new File(FileName);  try  {   BufferedWriter bw;   FileWriter fw;   // 如果文件(班级)不存在则创建   if (!file.exists())   {    // 创建文件(班级)    file.createNewFile();   }   try   {    fw = new FileWriter(FileName, true);    bw = new BufferedWriter(fw);    bw.write(information);    bw.newLine();    bw.close();   }   catch (IOException ex)   {    ex.printStackTrace();   }  }  catch (IOException e1)  {   e1.printStackTrace();  } }    //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //查看 public void SeeAll(String FileName) {  String str = null;  for(int i =0;i<100;i++)  {   for(int j=0;j<12;j++)   {    student[i][j] = " ";   }  }  try        {         FileReader fr = new FileReader(FileName);         BufferedReader br = new BufferedReader(fr);         for(int i =0;(str = br.readLine())!=null;i++)         {          student[i] = str.split(" ");         }        }        catch (IOException e)        {         e.printStackTrace();        } } //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //查询 public int Search(String FileName,int num,String information) {  String str = null;  String temp [][] = new String[100][12];  int count = 0;  int flag = 0;  for(int i =0;i<100;i++)  {   for(int j=0;j<12;j++)   {    student[i][j] = "";   }  }  try        {         FileReader fr = new FileReader(FileName);         BufferedReader br = new BufferedReader(fr);         for(int i =0;(str = br.readLine())!=null;i++)         {          temp[i] = str.split(" ");          if(temp[i][num].equals(information))          {           student[count] = temp[i];           count ++;           flag = 1;          }         }        }        catch (IOException e)        {         e.printStackTrace();        }        return flag; } //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //删除 public int delete(String FileName,int num,String information) {  FileReader fr;  BufferedReader br;  BufferedWriter bw;  FileWriter fw;  String str = null;  int count = 0;  int k = 0;  int flag = 0;//判断该学生是否存在 0 没有 1 有  String temp [][] = new String[100][12];  for(int i =0;i<100;i++)  {   for(int j=0;j<12;j++)   {    student[i][j] = "";   }  }        try        {         fr = new FileReader(FileName);         br = new BufferedReader(fr);         for(int i =0;(str = br.readLine())!=null;i++)         {          temp[i] = str.split(" ");          if(temp[i][num].equals(information))          {           flag = 1;           continue;          }          student[count++]=temp[i];          if(k == 0)          {           fw = new FileWriter(FileName);           k++;          }          else          {           fw = new FileWriter(FileName,true);          }          bw = new BufferedWriter(fw);          bw.write(str);           bw.newLine();           bw.close();         }         br.close();                 }        catch (FileNotFoundException e)        {         e.printStackTrace();        }        catch (IOException e)        {         e.printStackTrace();        }        return flag; } //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //修改 public int alter(int num,String information[]) {  FileReader fr;  BufferedReader br;  BufferedWriter bw;  FileWriter fw;  String str = null;  String tempStr = null;  int k =0;  int flag = 0;//判断该学生是否存在 0 没有 1 有  double total = 0;  String temp [][] = new String[100][12];  for(int i =0;i<100;i++)  {   for(int j=0;j<12;j++)   {    student[i][j] = " ";   }  }        try        {         fr = new FileReader(FileName);         br = new BufferedReader(fr);         for(int i =0;(str = br.readLine())!=null;i++)         {          temp[i] = str.split(" ");          if(temp[i][num].equals(information[num]))          {System.out.print("gggggggggf");           tempStr = null;           flag = 1;           for(int j =0;j<= 9;j++)           {            if(information[j].equals(""))            {             if(j>=6)//修改单科成绩也要修改总成绩 和平均分             {              total += Double.parseDouble(temp[i][j]);             }             if(j == 0)              tempStr = temp[i][j];             else              tempStr=tempStr+" "+temp[i][j];             continue;            }            if(j>=6)            {             total += Double.parseDouble(information[j]);            }            temp[i][j] = information[j];            if(j == 0)             tempStr=temp[i][j];            else             tempStr=tempStr+" "+temp[i][j];           }           str = tempStr+" "+String.valueOf(total)+" "+String.valueOf((int)(total/4));           temp[i][10] = String.valueOf(total);temp[i][11] = String.valueOf((int)(total/4));          }          student[i]=temp[i];          if(k == 0)          {           fw = new FileWriter(FileName);           k++;          }          else          {           fw = new FileWriter(FileName,true);          }          bw = new BufferedWriter(fw);          bw.write(str);           bw.newLine();           bw.close();         }         br.close();                 }        catch (FileNotFoundException e)        {         e.printStackTrace();        }        catch (IOException e)        {         e.printStackTrace();        }        return flag; } //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //排序 public void Sort(int num) {  String str = null;  double d1,d2;  int count = 0;  for(int i =0;i<100;i++)  {   for(int j=0;j<12;j++)   {    student[i][j] = null;   }  }  try        {         FileReader fr = new FileReader(FileName);         BufferedReader br = new BufferedReader(fr);         for(int i =0;(str = br.readLine())!=null;i++)         {          student[i] = str.split(" ");          count++;         }         for (int j = 0;j < count;j++)    {       for (int i = 0;i < count-1;i++)     {         String[] temp;     d1 = Double.parseDouble(student[i][num]);     d2 = Double.parseDouble(student[i+1][num]);     if(num == 3 ||num == 6||num == 7||num == 8|| num == 9||num == 10)     {      if (d11];            student[i + 1] = temp;               }       }     else     {      if (d1>d2)      {            temp = student[i];            student[i] = student[i + 1];            student[i + 1] = temp;               }      }          }     }         }        catch (IOException e)        {         e.printStackTrace();        } } //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //查询平均成绩 public double SearchAvg(int num) {  String str = null;  String temp [][] = new String[100][10];  double total = 0;  int count = 0;  for(int i =0;i<100;i++)  {   for(int j=0;j<12;j++)   {    student[i][j] = "";   }  }  try        {         FileReader fr = new FileReader(FileName);         BufferedReader br = new BufferedReader(fr);         for(int i =0;(str = br.readLine())!=null;i++)         {          count ++;          temp[i] = str.split(" ");          total +=Double.parseDouble(temp[i][num]);         }        }        catch (IOException e)        {         e.printStackTrace();        }        return total/count; } //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ public boolean Check(String str) {  int len = str.length();  for(int i =0;iif(str.charAt(i)<'0'||str.charAt(i)>'9')   {    return false;   }  }  return true; } //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //百分比 public int[] percent(int num) {  String temp [][] = new String[100][10];  String str = null;  int information[] = new int [7];  for(int i=0;i<6;i++)  {   information[i] = 0;  }  try        {         FileReader fr = new FileReader(FileName);         BufferedReader br = new BufferedReader(fr);         for(int i =0;(str = br.readLine())!=null;i++)         {          temp[i] = str.split(" ");          information[5]++;          if(Double.parseDouble(temp[i][num])>=90)          {           information[0]++;          }          else if(Double.parseDouble(temp[i][num])>=80)          {           information[1]++;          }          else if(Double.parseDouble(temp[i][num])>=70)          {           information[2]++;          }          else if(Double.parseDouble(temp[i][num])>=60)          {           information[3]++;          }          else if(Double.parseDouble(temp[i][num])<60)          {           information[4]++;          }         }        }        catch (IOException e)        {         e.printStackTrace();        }  return information; } //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ public void mouseReleased(MouseEvent e) {} public void mousePressed(MouseEvent e) {} public void mouseEntered(MouseEvent e) {} public void mouseExited(MouseEvent e) {} public void mouseClicked(MouseEvent e) {  Point p = e.getPoint();  row = jtable.rowAtPoint(p);  if (e.getClickCount() == 2)  {} } public void actionPerformed(ActionEvent e) {  

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