Java图形界面编程

一、个人用户界面

package 个人信息;

import java.awt.*;
//import java.awt.event.ActionEvent;
//import java.awt.event.WindowEvent;
//import java.awt.event.WindowListener;
//import java.awt.Button;
//import java.awt.Color;
//import java.awt.FlowLayout;
//import java.awt.Frame;
//import java.awt.Label;
//import java.awt.TextField;
import java.awt.event.*;

public class 个人信息 {

 public static void main (String arg[])
{
 Frame f1=new Frame("我的信息");
 f1.setSize(300,200);
 f1.setLocation(300, 240);
 f1.setBackground(Color.magenta);
 f1.setLayout(new FlowLayout());
 
 f1.add(new Label("姓名"));
 f1.add(new TextField("莫颜",25));
 f1.add(new Label("学号"));
 f1.add(new TextField("123456789",25));
 f1.add(new Label("性别"));
 f1.add(new TextField("女",25));
 Button button1=new Button("OJBK");
 button1.addActionListener((ActionListener) new 个人信息());
 f1.add( button1,BorderLayout.SOUTH);
 Button button2=new Button("EXIT");
 f1.add(button2,BorderLayout.EAST);
 button2.addActionListener((ActionListener) new 个人信息());
 
 f1.addWindowListener(new Close());
 f1.setVisible(true);
 
}

}

 

package 个人信息;

import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

public class Close implements WindowListener {

 public void windowActivated(WindowEvent arg0) {
  // TODO Auto-generated method stub
  System.out.println("激活成功");
 }

 public void windowClosed(WindowEvent arg0) {
  // TODO Auto-generated method stub
  System.out.println("关闭成功");

 }

 public void windowClosing(WindowEvent arg0) {
  // TODO Auto-generated method stub
  System.out.println("程序关闭");

 }

 public void windowDeactivated(WindowEvent arg0) {
  // TODO Auto-generated method stub
  System.out.println("不活动");

 }

 public void windowDeiconified(WindowEvent arg0) {
  // TODO Auto-generated method stub
  System.out.println("最小化再恢复");

 }

 public void windowIconified(WindowEvent arg0) {
  // TODO Auto-generated method stub
  

 }

 public void windowOpened(WindowEvent arg0) {
  // TODO Auto-generated method stub

 }

}

 

package 个人信息;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class Hello implements ActionListener {

 public void actionPerformed(ActionEvent arg0) {
  
  // TODO Auto-generated method stub
  System.out.println("Hello");

 }

 /**
  * @param args
  */
 public static void main(String[] args) {
  // TODO Auto-generated method stub

 }

}

 

 

 

二、计算器

package 计算器; 
import java.awt.BorderLayout; 
import java.awt.GridLayout; 
import java.awt.Image; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.util.ArrayList; 
import java.util.List; 
import javax.swing.*; 
public class 计算器 extends JFrame { 
    private JFrame jf=new JFrame("Calculator"); //窗口 
    private JPanel centerPanel=new JPanel();    //中间面板 
    private JPanel bottomPanel=new JPanel();    //底部面板 
     
    //中间三个按钮 
    private JButton Backbtn=new JButton("Back"); 
    private JButton CEbtn=new JButton("CE"); 
    private JButton Cbtn=new JButton("C"); 
     
    //初始化功能键 
    String[] nums={"7","8","9","+","4","5","6","-","1","2","3","*","0",".","=","/"}; 
    private JButton btn7=new JButton(nums[0]); 
    private JButton btn8=new JButton(nums[1]); 
    private JButton btn9=new JButton(nums[2]); 
    private JButton btnAdd=new JButton(nums[3]); 
    private JButton btn4=new JButton(nums[4]); 
    private JButton btn5=new JButton(nums[5]); 
    private JButton btn6=new JButton(nums[6]); 
    private JButton btnMimus=new JButton(nums[7]); 
    private JButton btn1=new JButton(nums[8]); 
    private JButton btn2=new JButton(nums[9]); 
    private JButton btn3=new JButton(nums[10]); 
    private JButton btnMultipus=new JButton(nums[11]); 
    private JButton btn0=new JButton(nums[12]); 
    private JButton btnDot=new JButton(nums[13]); 
    private JButton btnResult=new JButton(nums[14]); 
    private JButton btnDivide=new JButton(nums[15]); 
     
    //单行输入文本框 
    private JTextField txt=new JTextField(15); 
    private Listlists=new ArrayList(); //用来记录用户输入的数字和操作符 
     
    //主函数，程序入口 
    public static void main(String[] args){ 
        try { 
            new 计算器().init(); 
        } catch (Exception e) { 
            System.out.println("程序异常终止"); 
            System.exit(0);   //退出虚拟机 
        } 
    } 
    //初始化 
    public void init() throws Exception{ 
        //使用网格布局方式 
        bottomPanel.setLayout(new GridLayout(4,4,3,3)); //左右上下间隔是3 
        //将功能键添加到底部面板中 
        bottomPanel.add(btn7); 
        bottomPanel.add(btn8); 
        bottomPanel.add(btn9); 
        bottomPanel.add(btnAdd); 
        bottomPanel.add(btn4); 
        bottomPanel.add(btn5); 
        bottomPanel.add(btn6); 
        bottomPanel.add(btnMimus); 
        bottomPanel.add(btn1); 
        bottomPanel.add(btn2); 
        bottomPanel.add(btn3); 
        bottomPanel.add(btnMultipus); 
        bottomPanel.add(btn0); 
        bottomPanel.add(btnDot); 
        bottomPanel.add(btnResult); 
        bottomPanel.add(btnDivide); 
         
        //将中间的三个按钮添加到中间面板 
        centerPanel.add(Backbtn); 
        centerPanel.add(CEbtn); 
        centerPanel.add(Cbtn); 
         
        jf.add(txt,BorderLayout.NORTH);   //将单行文本框添加到窗口的 北部 
        jf.add(centerPanel);              //将中间面板添加到窗口中间（默认是中间） 
        jf.add(bottomPanel,BorderLayout.SOUTH);  //将底部面板添加到窗口的南部 
         
    
        //为数字按钮添加监听事件     使用匿名内部类 
        ActionListener numBtnListener=new ActionListener(){ 
            @Override 
            public void actionPerformed(ActionEvent e) { 
                //得到输入文本框的内容 
                String text=txt.getText(); 
                //判断有没有这句话 （0不能做分母，请清零后重试）,如果有 ，当点击数字按钮的时候要它消失 
                if("除数不能为0".equals(text)){ 
                    txt.setText(e.getActionCommand()); 
                    return; 
                } 
                //如果第一个数是0，就不能输入其他数字了，只能输入小数点了 
                if("0".equals(text)){ 
                    return; 
                } 
                if("".equals(text)){  //当文本域中没数据的时候，把当前点击的数字显示上去 
                    txt.setText(e.getActionCommand()); 
                }else{ 
                    //如果当前输入框有数据，并且是操作符时，记录下该操作符 
                    if(text.equals("+") || text.equals("-") || text.equals("*") || text.equals("/")){ 
                        lists.add(text);  //将操作符添加到集合中 
                        txt.setText(""); 
                        text=""; //将得到的文本符空，也就是将+或-或 *或/赋空值 
                    } 
                    text+=e.getActionCommand(); 
                    txt.setText(text); 
                } 
            } 
        }; 
        //为数字注册 监听器 
        btn1.addActionListener(numBtnListener); 
        btn2.addActionListener(numBtnListener); 
        btn3.addActionListener(numBtnListener); 
        btn4.addActionListener(numBtnListener); 
        btn5.addActionListener(numBtnListener); 
        btn6.addActionListener(numBtnListener); 
        btn7.addActionListener(numBtnListener); 
        btn8.addActionListener(numBtnListener); 
        btn9.addActionListener(numBtnListener); 
         
     
         
        //为+-*/添加事件监听    使用匿名内部类   
        ActionListener operationBtnListener=new ActionListener(){ 
            @Override 
            public void actionPerformed(ActionEvent e) { 
                //获取输入文本框内的内容 
                String text=txt.getText(); 
                if("".equals(text)){ 
                    return; 
                } 
                if("+".equals(text) || "-".equals(text) || "*".equals(text) || "/".equals(text)){ 
                    return; 
                } 
                //将内容添加到集合中 
                lists.add(text); 
                //将输入框清空 
                txt.setText(""); 
                //把按钮上面的字显示进去 
                txt.setText(e.getActionCommand()); 
            } 
        }; 
        //为* - + /注册监听器 
        btnAdd.addActionListener(operationBtnListener); 
        btnMimus.addActionListener(operationBtnListener); 
        btnMultipus.addActionListener(operationBtnListener); 
        btnDivide.addActionListener(operationBtnListener); 
         
        //为 =按钮添加事件监听 
        ActionListener resultBtnListener=new ActionListener(){ 
            @Override 
            public void actionPerformed(ActionEvent e) { 
                //判断集合中的数据 
                if(lists.isEmpty()){ 
                    return; 
                } 
                //获取文本输入框的内容 
                String text=txt.getText(); 
                if("".equals(txt) || "+".equals(text) || "-".equals(text) || "*".equals(text) || "/".equals(text)){ 
                    return; 
                } 
                //将其添加到集合中 
                lists.add(text); 
                if(lists.size()<3){ 
                    return; 
                } 
                String one=lists.get(0);  //得到集合中的第一个数 
                String two=lists.get(1); //得到集合中的第二个数 
                String three=lists.get(2); //得到集合中的第三个数 
                switch(two){ 
                case "+": 
                    double i=Double.parseDouble(one); 
                    double j=Double.parseDouble(three); 
                    txt.setText((i+j)+""); //显示结果 
                    break; 
                case "-": 
                    double x=Double.parseDouble(one); 
                    double y=Double.parseDouble(three); 
                    txt.setText((x-y)+""); //显示结果 
                    break; 
                     
                case "*": 
                    double a=Double.parseDouble(one); 
                    double b=Double.parseDouble(three); 
                    txt.setText((a*b)+""); 
                    break; 
                case "/": 
                    double k=Double.parseDouble(one); 
                    double h=Double.parseDouble(three); 
                    if(h==0){ 
                        txt.setText("除数不能为0"); 
                        lists.clear(); 
                        return; 
                    } 
                    txt.setText((k/h)+""); 
                    break; 
                } 
                //将集合中的数据清空 
                lists.clear(); 
            } 
        }; 
        //为=等号按钮注册监听器 
        btnResult.addActionListener(resultBtnListener); 
        //自定义窗口的图标 
        ImageIcon image=new ImageIcon("image/girl.jpg"); //图片位置 
        image.setImage(image.getImage().getScaledInstance(30,30,Image.SCALE_DEFAULT)); 
        jf.setIconImage(image.getImage()); 
        //设置UI的风格为Nimbus 
        UIManager.setLookAndFeel("javax.swing.plaf.nimbus.NimbusLookAndFeel"); 
        //更新f窗口内所有组件的UI 
        SwingUtilities.updateComponentTreeUI(jf.getContentPane()); 
        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//点X关闭窗口 
        jf.setLocation(400, 200); //初始化时定位 
        jf.setResizable(false);   //禁止拖曳改变窗口大小 
        jf.pack();               //让窗口的大小自适应 
        jf.setVisible(true);  //显示窗口 
    } 
}