201771010128王玉兰《面向对象程序设计（Java）》课程学习总结

1、实验目的与要求

(1) 综合掌握java基本程序结构； 

(2) 综合掌握java面向对象程序设计特点；

(3) 综合掌握java GUI 程序设计结构；

(4) 综合掌握java多线程编程模型；

(5) 综合编程练习。

2、实验内容和步骤

任务1：填写课程课后调查问卷，网址：https://www.wjx.cn/jq/33108969.aspx。

任务2：综合编程练习

练习1：设计一个用户信息采集程序，要求如下：

（1） 用户信息输入界面如下图所示:

 （1）用户点击提交按钮时，用户输入信息显示控制台界面；

（2）用户点击重置按钮后，清空用户已输入信息；

（3）点击窗口关闭，程序退出。

import java.awt.*;
import javax.swing.*;

public class DemoJFrame extends JFrame {
    private JPanel jPanel1;
    private JPanel jPanel2;
    private JPanel jPanel3;
    private JPanel jPanel4;
    private JTextField fieldname;
    private JComboBox comboBox;
    private JTextField fieldadress;
    private ButtonGroup bg;
    private JRadioButton nan;
    private JRadioButton nv;
    private JCheckBox sing;
    private JCheckBox dance;
    private JCheckBox read;

    public DemoJFrame() {
        // 设置窗口大小
        this.setSize(800, 400);
        // 设置可见性
        this.setVisible(true);
        // 设置标题
        this.setTitle("Students Detail");
        // 设置关闭操作
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        // 设置窗口居中
        WinCenter.center(this);
        this.setLayout(new FlowLayout(FlowLayout.LEFT));
        // 创建四个面板对象
        jPanel1 = new JPanel();
        setJPanel1(jPanel1);
        jPanel2 = new JPanel();
        setJPanel2(jPanel2);
        jPanel3 = new JPanel();
        setJPanel3(jPanel3);
        jPanel4 = new JPanel();
        setJPanel4(jPanel4);
        // 设置容器的为流布局
        FlowLayout flowLayout = new FlowLayout();
        this.setLayout(flowLayout);
        // 将四个面板添加到容器中
        this.add(jPanel1);
        this.add(jPanel2);
        this.add(jPanel3);
        this.add(jPanel4);

    }

    /*
     * 设置面一
     */
    private void setJPanel1(JPanel jPanel) {
        // TODO 自动生成的方法存根
        jPanel.setPreferredSize(new Dimension(700, 45));
        // 给面板的布局设置为网格布局 一行4列
        jPanel.setLayout(new GridLayout(1, 4));
        JLabel name = new JLabel("Name:");
        fieldname = new JTextField("");
        JLabel study = new JLabel("Qualification:");
        comboBox = new JComboBox();
        comboBox.addItem("小学");
        comboBox.addItem("初中");
        comboBox.addItem("高中");
        comboBox.addItem("本科");
        jPanel.add(name);
        jPanel.add(fieldname);
        jPanel.add(study);
        jPanel.add(comboBox);
        this.add(jPanel);
    }

    /*
     * 设置面板二
     */
    private void setJPanel2(JPanel jPanel) {
        // TODO 自动生成的方法存根
        jPanel.setPreferredSize(new Dimension(700, 50));
        // 给面板的布局设置为网格布局 一行4列
        jPanel.setLayout(new GridLayout(1, 4));
        JLabel name = new JLabel("Adress:");
        fieldadress = new JTextField();
        fieldadress.setPreferredSize(new Dimension(150, 50));
        JLabel study = new JLabel("Hobby:");
        JPanel selectBox = new JPanel();
        selectBox.setBorder(BorderFactory.createTitledBorder(""));
        selectBox.setLayout(new GridLayout(3, 1));
        read = new JCheckBox("Reading");
        sing = new JCheckBox("Singing");
        dance = new JCheckBox("Dancing");
        selectBox.add(read);
        selectBox.add(sing);
        selectBox.add(dance);

        jPanel.add(name);
        jPanel.add(fieldadress);
        jPanel.add(study);
        jPanel.add(selectBox);
    }

    /*
     * 设置面板三
     */
    private void setJPanel3(JPanel jPanel) {
        // TODO 自动生成的方法存根
        jPanel.setPreferredSize(new Dimension(700, 150));
        FlowLayout flowLayout = new FlowLayout(FlowLayout.LEFT);
        jPanel.setLayout(flowLayout);
        JLabel sex = new JLabel("Sex:");
        JPanel selectBox = new JPanel();
        selectBox.setBorder(BorderFactory.createTitledBorder(""));
        selectBox.setLayout(new GridLayout(2, 1));
        bg = new ButtonGroup();
        nan = new JRadioButton("男");
        nv = new JRadioButton("女");
        bg.add(nan);
        bg.add(nv);
        selectBox.add(nan);
        selectBox.add(nv);
        jPanel.add(sex);
        jPanel.add(selectBox);

    }

    /*
     * 设置面板四
     */
    private void setJPanel4(JPanel jPanel) {
        // TODO 自动生成的方法存根
        jPanel.setPreferredSize(new Dimension(700, 150));
        FlowLayout flowLayout = new FlowLayout(FlowLayout.CENTER, 50, 10);
        jPanel.setLayout(flowLayout);
        jPanel.setLayout(flowLayout);
        JButton sublite = new JButton("Validate");
        JButton reset = new JButton("Reset");
        sublite.addActionListener((e) -> valiData());
        reset.addActionListener((e) -> Reset());
        jPanel.add(sublite);
        jPanel.add(reset);
    }

    /*
     * 提交数据
     */
    private void valiData() {
        // TODO 自动生成的方法存根
        // 拿到数据
        String name = fieldname.getText().toString().trim();
        String qualification = comboBox.getSelectedItem().toString().trim();
        String address = fieldadress.getText().toString().trim();
        System.out.println("姓名： " + name);
        System.out.println("学历： " + qualification);
        System.out.println("地址： " + address);
        String hobbystring = "";
        if (read.isSelected()) {
            hobbystring += "Reading  ";
        }
        if (sing.isSelected()) {
            hobbystring += "Singing   ";
        }
        if (dance.isSelected()) {
            hobbystring += "Dancing  ";
        }
        System.out.println("爱好： " + hobbystring);
        if (nan.isSelected()) {
            System.out.println("性别：男");
        }
        if (nv.isSelected()) {
            System.out.println("性别：女");
        }

    }

    /*
     * 重置
     */
    private void Reset() {
        // TODO 自动生成的方法存根
        fieldadress.setText(null);
        fieldname.setText(null);
        comboBox.setSelectedIndex(0);
        sing.setSelected(false);
        dance.setSelected(false);
        read.setSelected(false);
        bg.clearSelection();
    }
}

　　

import java.awt.EventQueue;

import javax.swing.JFrame;

public class Main {
    public static void main(String[] args) {
        EventQueue.invokeLater(() -> {
            DemoJFrame page = new DemoJFrame();
        });
    }
}

　　

import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.Window;

public class WinCenter {
    public static void center(Window win) {
        Toolkit tkit = Toolkit.getDefaultToolkit();
        Dimension sSize = tkit.getScreenSize();
        Dimension wSize = win.getSize();
        if (wSize.height > sSize.height) {
            wSize.height = sSize.height;
        }
        if (wSize.width > sSize.width) {
            wSize.width = sSize.width;
        }
        win.setLocation((sSize.width - wSize.width) / 2, (sSize.height - wSize.height) / 2);
    }
}

　　实验结果：

 

 

练习2：采用GUI界面设计以下程序：

l 编制一个程序，将身份证号.txt 中的信息读入到内存中；

l 按姓名字典序输出人员信息；

l 查询最大年龄的人员信息；

l 查询最小年龄人员信息；

l 输入你的年龄，查询身份证号.txt中年龄与你最近人的姓名、身份证号、年龄、性别和出生地；

l 查询人员中是否有你的同乡。

l 输入身份证信息，查询所提供身份证号的人员信息，要求输入一个身份证数字时，查询界面就显示满足查询条件的查询结果，且随着输入的数字的增多，查询匹配的范围逐渐缩小。

package ID;

import java.awt.*;
import javax.swing.*;

/**
 * @version 1.34 2015-06-12
 * @author Cay Horstmann
 */
public class button {
    public static void main(String[] args) {
        EventQueue.invokeLater(() -> {
            JFrame frame = new Main();
            frame.setTitle("身份证");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setVisible(true);
        });
    }
}

　　

package ID;

public class Person implements Comparable {
    private String name;
    private String ID;
    private int age;
    private String sex;
    private String birthplace;

    public String getname() {
        return name;
    }

    public void setname(String name) {
        this.name = name;
    }

    public String getID() {
        return ID;
    }

    public void setID(String ID) {
        this.ID = ID;
    }

    public int getage() {

        return age;
    }

    public void setage(int age) {

        this.age = age;
    }

    public String getsex() {
        return sex;
    }

    public void setsex(String sex) {
        this.sex = sex;
    }

    public String getbirthplace() {
        return birthplace;
    }

    public void setbirthplace(String birthplace) {
        this.birthplace = birthplace;
    }

    public int compareTo(Person o) {
        return this.name.compareTo(o.getname());
    }

    public String toString() {
        return name + "\t" + sex + "\t" + age + "\t" + ID + "\t" + birthplace + "\n";
    }
}

　　

package ID;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class Main extends JFrame {
    private static ArrayList personlist;
    private static ArrayList list;
    private JPanel panel;
    private JPanel buttonPanel;
    private static final int DEFAULT_WIDTH = 600;
    private static final int DEFAULT_HEIGHT = 300;

    public Main() {

        personlist = new ArrayList<>();
        Scanner scanner = new Scanner(System.in);
        File file = new File("身份证号.txt");
        try {
            FileInputStream fis = new FileInputStream(file);
            BufferedReader in = new BufferedReader(new InputStreamReader(fis));
            String temp = null;
            while ((temp = in.readLine()) != null) {

                Scanner linescanner = new Scanner(temp);

                linescanner.useDelimiter(" ");
                String name = linescanner.next();
                String ID = linescanner.next();
                String sex = linescanner.next();
                String age = linescanner.next();
                String place = linescanner.nextLine();
                Person Person = new Person();
                Person.setname(name);
                Person.setID(ID);
                Person.setsex(sex);
                int a = Integer.parseInt(age);
                Person.setage(a);
                Person.setbirthplace(place);
                personlist.add(Person);

            }
        } catch (FileNotFoundException e) {
            System.out.println("查找不到信息");
            e.printStackTrace();
        } catch (IOException e) {
            System.out.println("信息读取有误");
            e.printStackTrace();
        }
        JPanel panel = new JPanel();
        panel.setLayout(new BorderLayout());
        JTextArea jt = new JTextArea();
        panel.add(jt);
        add(panel, BorderLayout.CENTER);
        JPanel buttonPanel = new JPanel();
        buttonPanel.setLayout(new GridLayout(1, 7));
        JButton jButton = new JButton("字典排序");
        JButton jButton1 = new JButton("年龄最大和年龄最小");
        JLabel lab = new JLabel("你的老乡");
        JTextField jt1 = new JTextField();
        JLabel lab1 = new JLabel("查找年龄相近的：");
        JTextField jt2 = new JTextField();
        JLabel lab2 = new JLabel("输入你的身份证号码：");

        JTextField jt3 = new JTextField();
        JButton jButton2 = new JButton("退出");
        jButton.setBounds(110, 90, 40, 50);
        jButton1.setBounds(110, 90, 40, 50);
        jt1.setBounds(110, 90, 40, 50);
        jt2.setBounds(110, 90, 40, 50);
        jt3.setBounds(110, 90, 40, 50);
        jButton2.setBounds(110, 90, 40, 50);
        jButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                Collections.sort(personlist);
                jt.setText(personlist.toString());
            }
        });
        jButton1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                int max = 0, min = 100;
                int j, k1 = 0, k2 = 0;
                for (int i = 1; i < personlist.size(); i++) {
                    j = personlist.get(i).getage();
                    if (j > max) {
                        max = j;
                        k1 = i;
                    }
                    if (j < min) {
                        min = j;
                        k2 = i;
                    }

                }
                jt.setText("年龄最大：" + personlist.get(k1) + "年龄最小：" + personlist.get(k2));
            }
        });
        jButton2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                dispose();
                System.exit(0);
            }
        });
        jt1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String find = jt1.getText();
                String text = "";
                String place = find.substring(0, 3);
                for (int i = 0; i < personlist.size(); i++) {
                    if (personlist.get(i).getbirthplace().substring(1, 4).equals(place)) {
                        text += "\n" + personlist.get(i);
                        jt.setText("老乡：" + text);
                    }
                }
            }
        });
        jt2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String yourage = jt2.getText();
                int a = Integer.parseInt(yourage);
                int near = agenear(a);
                int value = a - personlist.get(near).getage();
                jt.setText("年龄相近：" + personlist.get(near));
            }
        });
        jt3.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                list = new ArrayList<>();
                Collections.sort(personlist);
                String key = jt3.getText();
                for (int i = 1; i < personlist.size(); i++) {
                    if (personlist.get(i).getID().contains(key)) {
                        list.add(personlist.get(i));
                        jt.setText("你可能是：\n" + list);
                    }
                }
            }
        });
        buttonPanel.add(jButton);
        buttonPanel.add(jButton1);
        buttonPanel.add(lab);
        buttonPanel.add(jt1);
        buttonPanel.add(lab1);
        buttonPanel.add(jt2);
        buttonPanel.add(lab2);
        buttonPanel.add(jt3);
        buttonPanel.add(jButton2);
        add(buttonPanel, BorderLayout.SOUTH);
        setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
    }

    public static int agenear(int age) {
        int min = 53, value = 0, k = 0;
        for (int i = 0; i < personlist.size(); i++) {
            value = personlist.get(i).getage() - age;
            if (value < 0)
                value = -value;
            if (value < min) {
                min = value;
                k = i;
            }
        }
        return k;
    }

}

　　实验结果：

 

练习3：采用GUI界面设计以下程序

l 编写一个计算器类，可以完成加、减、乘、除的操作

l 利用计算机类，设计一个小学生100以内数的四则运算练习程序，由计算机随机产生10道加减乘除练习题，学生输入答案，由程序检查答案是否正确，每道题正确计10分，错误不计分，10道题测试结束后给出测试总分；

l 将程序中测试练习题及学生答题结果输出到文件，文件名为test.txt。

package math;

import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Toolkit;

import javax.swing.JFrame;

public class math {

    public static void main(String args[]) {
        Toolkit t = Toolkit.getDefaultToolkit();
        Dimension s = t.getScreenSize();
        EventQueue.invokeLater(() -> {
            JFrame frame = new main();
            frame.setBounds(0, 0, (int) s.getWidth() / 2, (int) s.getHeight() / 2);
            frame.setTitle("算术测试");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setVisible(true);
        });
    }

}

　　

package math;

import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Collections;
import java.util.Scanner;

import javax.swing.*;

import java.math.*;

public class main extends JFrame {

    private String[] c = new String[10];
    private String[] c1 = new String[10];
    private int[] list = new int[10];
    int i = 0, i1 = 0, sum = 0;

    private PrintWriter out = null;
    private JTextArea text, text1;
    private int counter;

    public main() {
        JPanel Panel = new JPanel();
        Panel.setLayout(null);
        JLabel JLabel1 = new JLabel("");
        JLabel1.setBounds(500, 800, 400, 30);
        JLabel1.setFont(new Font("Courier", Font.PLAIN, 20));
        JButton Button = new JButton("生成题目");
        Button.setBounds(50, 150, 150, 50);
        Button.setFont(new Font("Courier", Font.PLAIN, 20));
        Button.addActionListener(new Action());
        JButton Button2 = new JButton("确定答案");
        Button2.setBounds(300, 150, 150, 50);
        Button2.setFont(new Font("Courier", Font.PLAIN, 20));
        Button2.addActionListener(new Action1());
        JButton Button3 = new JButton("读出文件");
        Button3.setBounds(500, 150, 150, 50);
        Button3.setFont(new Font("Courier", Font.PLAIN, 20));
        Button3.addActionListener(new Action2());
        text = new JTextArea(30, 80);
        text.setBounds(30, 50, 200, 50);
        text.setFont(new Font("Courier", Font.PLAIN, 30));
        text1 = new JTextArea(30, 80);
        text1.setBounds(270, 50, 200, 50);
        text1.setFont(new Font("Courier", Font.PLAIN, 30));

        Panel.add(text);
        Panel.add(text1);

        Panel.add(Button);
        Panel.add(Button2);
        Panel.add(Button3);
        Panel.add(JLabel1);
        add(Panel);

    }

    private class Action implements ActionListener {
        public void actionPerformed(ActionEvent event) {
            text1.setText("");
            if (i <= 10) {

                int a = (int) Math.round(Math.random() * 100);
                int b = (int) Math.round(Math.random() * 100);
                int m = (int) Math.round(Math.random() * 3);
                switch (m) {
                case 0:
                    while (a % b != 0) {
                        a = (int) Math.round(Math.random() * 100);
                    }
                    while (b == 0) {
                        b = (int) Math.round(Math.random() * 100);
                    }
                    c[i] = (i + ":" + a + "/" + b + "=");
                    list[i] = Math.floorDiv(a, b);
                    text.setText(i + ":" + a + "/" + b + "=");
                    i++;

                    break;
                case 1:
                    c[i] = (i + ":" + a + "*" + b + "=");
                    list[i] = Math.multiplyExact(a, b);
                    text.setText(i + ":" + a + "*" + b + "=");
                    i++;
                    break;
                case 2:
                    c[i] = (i + ":" + a + "+" + b + "=");
                    list[i] = Math.addExact(a, b);
                    text.setText(i + ":" + a + "+" + b + "=");
                    i++;
                    break;
                case 3:
                    while (a < b) {
                        b = (int) Math.round(Math.random() * 100);
                        a = (int) Math.round(Math.random() * 100);
                    }
                    c[i] = (i + ":" + a + "-" + b + "=");
                    text.setText(i + ":" + a + "-" + b + "=");
                    list[i] = Math.subtractExact(a, b);
                    i++;

                    break;
                }
            }
        }
    }

    private class Action1 implements ActionListener {
        public void actionPerformed(ActionEvent event) {

            if (i < 10) {
                text.setText(null);
                String z = text1.getText().toString().trim();
                int a = Integer.parseInt(z);
                if (text1.getText() != "") {
                    if (list[i1] == a)
                        sum += 10;
                }

                c1[i1] = z;

                i1++;

            }
        }

    }

    private class Action2 implements ActionListener {
        public void actionPerformed(ActionEvent event) {

            try {
                out = new PrintWriter("text.txt");
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            for (int counter = 0; counter < 10; counter++) {
                out.println(c[counter] + c1[counter]);
            }
            out.println("成绩" + sum);
            out.close();

        }

    }
}

　　实验结果：

 

 

 

任务3：本学期课程已结束，请汇总《面向对象程序设计课程学习进度条》的数据，统计个人专业能力提升的数据。并从学习内容、学习方法、学习心得几个方面进行课程学习总结，也希望你对课程的不足提出建议和意见。

学习内容：

 

学习内容：我们学习的内容就是十四章，老师采用我们自主学习，带领学习，实验演示以及周末完成博客作业的方式。即内容分为主次关系，如前三章，基于学习了C语言，自主学习，从4章开始正式讲授，继承，接口和异常处理，是我们学习的重要内容，这三章概念很多，要会使用具体的API，还有lambda表达式可以简化代码，掌握这一方法是作为一个程序员必掌握。图形用户界面以及线程的模块的学习，老师花了大量精力。在学习Java的过程中，我们不断完善：身份证查询，四则运算和图形用户界面的三个大实验，在学长周五晚上的带领下，最后基本完成了用户使用的要求。

 

学习方法：我的学习方法就是课上听老师讲解理论的概念，实验课上老师和助教的演示，在周末完成博客作业。暂时还没有遇到一个问题自行处理的能力，力不从心，老师推荐了慕课平台的课程，但是由于时间和自己懒惰的原因，没有坚持下来，我会选择在假期去完成，以便提升自己。

 

学习心得：领到又厚又重的Java书，就像是昨天一样。转眼间，这本《面向对象程序设计书》在老师的分配任务下，总算是完成了。我们的助教非常负责，在他身上看到了许多优点，比如：坚持，问心无愧，默默无闻，非常认可老师的这种方案，同时也很感谢学长。