2019.11.28

Posted 2021-03-17 quan-2723365710

（三）键盘事件
1、键盘弹颜色KeyColor。运行结果如下，当按下1/2/3个键时，按钮的颜色分别为蓝黄绿。试用普通当前类和匿名内部类两种方式分别实例化监听器对象。最后，请把它扩展到7个键，颜色分别为：赤橙黄绿青蓝紫。（40分）

代码1：
package MyAdvancedEvent;
import java.awt.Color;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.*;
public class MyKeyEvent_Example {
    JFrame f;
    JPanel p;
    JButton b1,b2,b3;
    public MyKeyEvent_Example() {
        f=new JFrame();
        p=new JPanel();
        b1=new JButton("1");
        b2=new JButton("2");
        b3=new JButton("3");
        b1.addKeyListener(new KeyAdapter() {
            public void keyPressed(KeyEvent e) {
                if(e.getKeyChar()=='1') {
                    b1.setBackground(Color.BLUE);
                }else if(e.getKeyChar()=='2') {
                    b2.setBackground(Color.YELLOW);
                }else {
                    b3.setBackground(Color.GREEN);
                }
            }
            public void keyReleased(KeyEvent e) {
                b1.setBackground(null);
                b2.setBackground(null);
                b3.setBackground(null);
            }
        });
        p.add(b1);
        p.add(b2);
        p.add(b3);
        f.add(p);
        f.setSize(300,200);
        f.setLocationRelativeTo(null);
        f.setVisible(true);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new MyKeyEvent_Example();
    }
}
代码2：
package MyAdvancedEvent;
import java.awt.Color;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.*;
public class MyKeyEvent_Example1 implements KeyListener{
    JFrame f;
    JPanel p;
    JButton b1,b2,b3;
    public MyKeyEvent_Example1() {
        f=new JFrame();
        p=new JPanel();
        b1=new JButton("1");
        b1.addKeyListener(this);
        b2=new JButton("2");
        b2.addKeyListener(this);
        b3=new JButton("3");
        b3.addKeyListener(this);
        p.add(b1);
        p.add(b2);
        p.add(b3);
        f.add(p);
        f.setSize(300,200);
        f.setLocationRelativeTo(null);
        f.setVisible(true);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new MyKeyEvent_Example1();
    }
    public void keyTyped(KeyEvent e) {
        
    }
    public void keyPressed(KeyEvent e) {
        char str=e.getKeyChar();
        if(str=='1') {
            b1.setBackground(Color.BLUE);
        }else if(str=='2') {
            b2.setBackground(Color.YELLOW);
        }else {
            b3.setBackground(Color.GREEN);
        }
    }
    public void keyReleased(KeyEvent e) {
        b1.setBackground(null);
        b2.setBackground(null);
        b3.setBackground(null);
    }
}
代码3：
package MyAdvancedEvent;
import java.awt.Color;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.*;
public class MyKeyEvent_Example2 {
    JFrame f;
    JPanel p;
    JButton b1,b2,b3,b4,b5,b6,b7;
    public MyKeyEvent_Example2() {
        f=new JFrame();
        p=new JPanel();
        b1=new JButton("1");
        b2=new JButton("2");
        b3=new JButton("3");
        b4=new JButton("4");
        b5=new JButton("5");
        b6=new JButton("6");
        b7=new JButton("7");
        b1.addKeyListener(new KeyAdapter() {
            public void keyPressed(KeyEvent e) {
                if(e.getKeyChar()=='1') {
                    b1.setBackground(Color.RED);
                }else if(e.getKeyChar()=='2') {
                    b2.setBackground(Color.ORANGE);
                }else if(e.getKeyChar()=='3') {
                    b3.setBackground(Color.YELLOW);
                }else if(e.getKeyChar()=='4') {
                    b4.setBackground(Color.GREEN);
                }else if(e.getKeyChar()=='5') {
                    b5.setBackground(Color.CYAN);
                }else if(e.getKeyChar()=='6') {
                    b6.setBackground(Color.BLUE);
                }else {
                    b7.setBackground(new Color(138,43,226));
                }
            }
            public void keyReleased(KeyEvent e) {
                b1.setBackground(null);
                b2.setBackground(null);
                b3.setBackground(null);
                b4.setBackground(null);
                b5.setBackground(null);
                b6.setBackground(null);
                b7.setBackground(null);
            }
        });
        p.add(b1);
        p.add(b2);
        p.add(b3);
        p.add(b4);
        p.add(b5);
        p.add(b6);
        p.add(b7);
        f.add(p);
        f.setSize(300,200);
        f.setLocationRelativeTo(null);
        f.setVisible(true);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new MyKeyEvent_Example2();
    }
}
代码4：
package MyAdvancedEvent;
import java.awt.Color;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.*;
public class MyKeyEvent_Example4 implements KeyListener{
    JFrame f;
    JPanel p;
    JButton b1,b2,b3,b4,b5,b6,b7;
    public MyKeyEvent_Example4() {
        f=new JFrame();
        p=new JPanel();
        b1=new JButton("1");
        b2=new JButton("2");
        b3=new JButton("3");
        b4=new JButton("4");
        b5=new JButton("5");
        b6=new JButton("6");
        b7=new JButton("7");
        b1.addKeyListener(this);
        b2.addKeyListener(this);
        b3.addKeyListener(this);
        b4.addKeyListener(this);
        b5.addKeyListener(this);
        b6.addKeyListener(this);
        b7.addKeyListener(this);
        p.add(b1);
        p.add(b2);
        p.add(b3);
        p.add(b4);
        p.add(b5);
        p.add(b6);
        p.add(b7);
        f.add(p);
        f.setSize(300,200);
        f.setLocationRelativeTo(null);
        f.setVisible(true);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new MyKeyEvent_Example4();
    }
    public void keyTyped(KeyEvent e) {
        
    }
    public void keyPressed(KeyEvent e) {
        if(e.getKeyChar()=='1') {
            b1.setBackground(Color.RED);
        }else if(e.getKeyChar()=='2') {
            b2.setBackground(Color.ORANGE);
        }else if(e.getKeyChar()=='3') {
            b3.setBackground(Color.YELLOW);
        }else if(e.getKeyChar()=='4') {
            b4.setBackground(Color.GREEN);
        }else if(e.getKeyChar()=='5') {
            b5.setBackground(Color.CYAN);
        }else if(e.getKeyChar()=='6') {
            b6.setBackground(Color.BLUE);
        }else {
            b7.setBackground(new Color(138,43,226));
        }
    }
    public void keyReleased(KeyEvent e) {
        b1.setBackground(null);
        b2.setBackground(null);
        b3.setBackground(null);
        b4.setBackground(null);
        b5.setBackground(null);
        b6.setBackground(null);
        b7.setBackground(null);
    }
}

运行截图：

（四）窗体事件
2、P463【例25.3】捕获和处理窗体焦点变化事件示例WindowFocusListener_Example（书上有完整代码！）（10分）

代码：
package MyAdvancedEvent;
import java.awt.event.WindowEvent;
import java.awt.event.WindowFocusListener;

import javax.swing.*;
public class WindowFocusListener_Example extends JFrame{
    public static void main(String[] atrgs) {
        WindowFocusListener_Example frame=new WindowFocusListener_Example();
        frame.setVisible(true);
    }
    public WindowFocusListener_Example() {
        super();
        addWindowFocusListener(new myWindowFocusListener());
        setTitle("捕获窗体焦点事件");
        setBounds(100,100,500,375);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    private class myWindowFocusListener implements WindowFocusListener{
        public void windowGainedFocus(WindowEvent e) {
            System.out.println("窗口获得焦点");
        }
        public void windowLostFocus(WindowEvent e) {
            System.out.println("窗口失去焦点");
        }
    }
}

截图：

3、P464【例25.4】捕获窗体状态变化事件典型示例WindowStateListener_Example（书上有完整代码！）（10分）

代码：
package MyAdvancedEvent;

import java.awt.Frame;
import java.awt.event.WindowEvent;
import java.awt.event.WindowStateListener;

import javax.swing.*;

public class WindowStateListener_Example extends JFrame{
    public static void main(String[] args) {
        WindowStateListener_Example frame=new WindowStateListener_Example();
        frame.setVisible(true);
    }
    public WindowStateListener_Example() {
        super();
        addWindowStateListener(new MyWindowStateListener());
        setTitle("捕获窗体状态事件");
        setBounds(100,100,500,375);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    private class MyWindowStateListener implements WindowStateListener{
        public void windowStateChanged(WindowEvent e) {
            int oldstate=e.getOldState();
            int newstate=e.getNewState();
            String from="";
            String to="";
            switch(oldstate) {
            case Frame.NORMAL:
                from="正常化";break;
            case Frame.MAXIMIZED_BOTH:
                from="最大化";break;
            default:
                from="最小化";break;
            }
            switch(newstate) {
            case Frame.NORMAL:
                to="正常化";break;
            case Frame.MAXIMIZED_BOTH:
                to="最大化";break;
            default:
                to="最小化";
            }
            System.out.println(from+"---->"+to);
        }
    }
}

截图：

4、P465【例25.5】捕获和处理其它窗体事件示例WindowListener_Example（书上有完整代码！）（10分）

代码：
package MyAdvancedEvent;

import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import javax.swing.*;
public class WindowListener_Example extends JFrame{
    public static void main(String[] args) {
        WindowListener_Example frame=new WindowListener_Example();
        frame.setVisible(true);
    }
    public WindowListener_Example() {
        super();
        addWindowListener(new MyWindowListener());
        setTitle("捕获其他窗体事件");
        setBounds(100,100,500,375);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    private class MyWindowListener implements WindowListener{
        public void windowOpened(WindowEvent e) {
            System.out.println("窗口被打开！");
        }
        public void windowClosing(WindowEvent e) {
            System.out.println("窗口将要被关闭！");
        }
        public void windowIconified(WindowEvent e) {
            System.out.println("窗口被最小化！");
        }
        public void windowDeiconified(WindowEvent e) {
            System.out.println("窗口被非最小化！");
        }
        public void windowActivated(WindowEvent e) {
            System.out.println("窗口被激活！");
        }
        public void windowDeactivated(WindowEvent e) {
            System.out.println("窗口不在处于激活状态！");
        }
        public void windowClosed(WindowEvent e) {
            System.out.println("窗口已经被关闭！");
        }
    }
}

截图：

（五）选项事件
6、P467【例25.6】捕获和处理选项事件的示例ItemEvent_Example（20分）

代码：
package MyAdvancedEvent;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.*;
public class ItemEvent_Example {
    JFrame f;
    JPanel p;
    JComboBox combobox;
    public ItemEvent_Example() {
        f=new JFrame("选项事件实例");
        p=new JPanel();
        combobox=new JComboBox();
        for(int i=1;i<6;i++) {
            combobox.addItem("选项"+i);
        }
        combobox.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {
                int statechange=e.getStateChange();
                String item=e.getItem().toString();
                if(statechange==ItemEvent.SELECTED) {
                    System.out.println("此次事件由    选中   选项"+"“"+item+"”"+"触发！");
                }else if(statechange==ItemEvent.DESELECTED) {
                    System.out.println("此次事件由    取消选中   选项"+"“"+item+"”"+"触发！");
                }else {
                    System.out.println("此次事件由其他原因触发！");
                }
            }
        });
        p.add(combobox);
        f.add(p);
        f.setVisible(true);
        f.setSize(400,200);
        f.setLocationRelativeTo(null);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new ItemEvent_Example();
    }
}

截图：

（六）选作题
7、九宫格井字棋游戏JFxunhuanT（10分）
效果如下图：

package MyAdvancedEvent;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MyChessEvent implements ActionListener{
    JFrame f1,f2;
    JPanel p;
    JButton b1,b2;
    JButton[]button=new JButton[9];
    JLabel l1,l2;
    int flag;
    int []a=new int[9];
    int []b=new int[9];
    int count;
    public MyChessEvent(){
        f1=new JFrame("游戏提示");
        f2=new JFrame("九宫格/井字棋");
        p=new JPanel(new GridLayout(3,3));
        l1=new JLabel("游戏开始，请选定先手。");
        l1.setFont(new Font("",Font.BOLD,20));
        l2=new JLabel("                  游戏开始");
        l2.setFont(new Font("",Font.BOLD,20));
        b1=new JButton("红0方");
        b1.addActionListener(this);
        b2=new JButton("蓝×方");
        b2.addActionListener(this);
        f1.add(l1,BorderLayout.NORTH);
        f1.add(b1,BorderLayout.WEST);
        f1.add(b2,BorderLayout.EAST);
        f1.setVisible(true);
        f1.setSize(250, 120);
        f1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f1.setLocationRelativeTo(null);
        for(int i=0;i<9;i++){
            button[i]=new JButton();
            button[i].addActionListener(this);
            p.add(button[i]);
        }
        f2.add(l2,BorderLayout.NORTH);
        f2.add(p,BorderLayout.CENTER);
        f2.setVisible(false);
        f2.setSize(300, 300);
        f2.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f2.setLocationRelativeTo(null);
    }
    public static void main(String[] args){
        new MyChessEvent();
    }
    public void actionPerformed(ActionEvent e) {
        String str=e.getActionCommand();
        if(str.equals("红0方")){
            f1.setVisible(false);
            f2.setVisible(true);
            flag=1;
        }else if(str.equals("蓝×方")){
            f1.setVisible(false);
            f2.setVisible(true);
            flag=2;
        }
        if(e.getSource()==button[0]&&flag==1) {
            button[0].setText("0");
            button[0].setFont(new Font("",Font.BOLD,50));
            button[0].setBackground(Color.red);
            button[0].setEnabled(false);
            count++;
            a[0]=1;
            flag=2;
        }else if(e.getSource()==button[1]&&flag==1) {
            button[1].setText("0");
            button[1].setFont(new Font("",Font.BOLD,50));
            button[1].setBackground(Color.red);
            button[1].setEnabled(false);
            count++;
            a[1]=1;
            flag=2;
        }else if(e.getSource()==button[2]&&flag==1) {
            button[2].setText("0");
            button[2].setFont(new Font("",Font.BOLD,50));
            button[2].setBackground(Color.red);
            button[2].setEnabled(false);
            count++;
            a[2]=1;
            flag=2;
        }else if(e.getSource()==button[3]&&flag==1) {
            button[3].setText("0");
            button[3].setFont(new Font("",Font.BOLD,50));
            button[3].setBackground(Color.red);
            button[3].setEnabled(false);
            count++;
            a[3]=1;
            flag=2;
        }else if(e.getSource()==button[4]&&flag==1) {
            button[4].setText("0");
            button[4].setFont(new Font("",Font.BOLD,50));
            button[4].setBackground(Color.red);
            button[4].setEnabled(false);
            count++;
            a[4]=1;
            flag=2;
        }else if(e.getSource()==button[5]&&flag==1) {
            button[5].setText("0");
            button[5].setFont(new Font("",Font.BOLD,50));
            button[5].setBackground(Color.red);
            button[5].setEnabled(false);
            count++;
            a[5]=1;
            flag=2;
        }else if(e.getSource()==button[6]&&flag==1) {
            button[6].setText("0");
            button[6].setFont(new Font("",Font.BOLD,50));
            button[6].setBackground(Color.red);
            button[6].setEnabled(false);
            count++;
            a[6]=1;
            flag=2;
        }else if(e.getSource()==button[7]&&flag==1) {
            button[7].setText("0");
            button[7].setFont(new Font("",Font.BOLD,50));
            button[7].setBackground(Color.red);
            button[7].setEnabled(false);
            count++;
            a[7]=1;
            flag=2;
        }else if(e.getSource()==button[8]&&flag==1) {
            button[8].setText("0");
            button[8].setFont(new Font("",Font.BOLD,50));
            button[8].setBackground(Color.red);
            button[8].setEnabled(false);
            count++;
            a[8]=1;
            flag=2;
        }else {
            if(e.getSource()==button[0]&&flag==2) {
                button[0].setText("×");
                button[0].setFont(new Font("",Font.BOLD,50));
                button[0].setBackground(Color.blue);
                button[0].setEnabled(false);
                count++;
                b[0]=1;
                flag=1;
            }else if(e.getSource()==button[1]&&flag==2) {
                button[1].setText("×");
                button[1].setFont(new Font("",Font.BOLD,50));
                button[1].setBackground(Color.blue);
                button[1].setEnabled(false);
                count++;
                b[1]=1;
                flag=1;
            }else if(e.getSource()==button[2]&&flag==2) {
                button[2].setText("×");
                button[2].setFont(new Font("",Font.BOLD,50));
                button[2].setBackground(Color.blue);
                button[2].setEnabled(false);
                count++;
                b[2]=1;
                flag=1;
            }else if(e.getSource()==button[3]&&flag==2) {
                button[3].setText("×");
                button[3].setFont(new Font("",Font.BOLD,50));
                button[3].setBackground(Color.blue);
                button[3].setEnabled(false);
                count++;
                b[3]=1;
                flag=1;
            }else if(e.getSource()==button[4]&&flag==2) {
                button[4].setText("×");
                button[4].setFont(new Font("",Font.BOLD,50));
                button[4].setBackground(Color.blue);
                button[4].setEnabled(false);
                count++;
                b[4]=1;
                flag=1;
            }else if(e.getSource()==button[5]&&flag==2) {
                button[5].setText("×");
                button[5].setFont(new Font("",Font.BOLD,50));
                button[5].setBackground(Color.blue);
                button[5].setEnabled(false);
                count++;
                b[5]=1;
                flag=1;
            }else if(e.getSource()==button[6]&&flag==2) {
                button[6].setText("×");
                button[6].setFont(new Font("",Font.BOLD,50));
                button[6].setBackground(Color.blue);
                button[6].setEnabled(false);
                count++;
                b[6]=1;
                flag=1;
            }else if(e.getSource()==button[7]&&flag==2) {
                button[7].setText("×");
                button[7].setFont(new Font("",Font.BOLD,50));
                button[7].setBackground(Color.blue);
                button[7].setEnabled(false);
                count++;
                b[7]=1;
                flag=1;
            }else if(e.getSource()==button[8]&&flag==2) {
                button[8].setText("×");
                button[8].setFont(new Font("",Font.BOLD,50));
                button[8].setBackground(Color.blue);
                button[8].setEnabled(false);
                count++;
                b[8]=1;
                flag=1;
            }
        }
        if((a[0]==1&&a[1]==1&&a[2]==1)||(a[0]==1&&a[3]==1&&a[6]==1)||(a[0]==1&&a[4]==1&&a[8]==1)||(a[1]==1&&a[4]==1&&a[7]==1)
        ||(a[2]==1&&a[5]==1&&a[8]==1)||(a[3]==1&&a[4]==1&&a[5]==1)||(a[2]==1&&a[4]==1&&a[6]==1)||(a[6]==1&&a[7]==1&&a[8]==1))
        {
            JLabel l=new JLabel();
            l.setText("红方获胜，是否再来一局？");
            l.setFont(new Font("",Font.BOLD,20));
            int i=JOptionPane.showConfirmDialog(f2, l,"游戏结束",JOptionPane.YES_NO_OPTION,JOptionPane.PLAIN_MESSAGE);
            if(i==JOptionPane.YES_NO_OPTION) {
                f2.setVisible(false);
                new MyChessEvent();
            }
        }
        else if((b[0]==1&&b[1]==1&&b[2]==1)||(b[0]==1&&b[3]==1&&b[6]==1)||(b[0]==1&&b[4]==1&&b[8]==1)||(b[1]==1&&b[4]==1&&b[7]==1)
        ||(b[2]==1&&b[5]==1&&b[8]==1)||(b[3]==1&&b[4]==1&&b[5]==1)||(b[2]==1&&b[4]==1&&b[6]==1)||(b[6]==1&&b[7]==1&&b[8]==1))
        {
            JLabel l=new JLabel();
            l.setText("蓝方获胜，是否再来一局？");
            l.setFont(new Font("",Font.BOLD,20));
            int i=JOptionPane.showConfirmDialog(f2, l,"游戏结束",JOptionPane.YES_NO_OPTION,JOptionPane.PLAIN_MESSAGE);
            if(i==JOptionPane.YES_NO_OPTION) {
                f2.setVisible(false);
                new MyChessEvent();
            }
        }
        else if(count==9){
            JLabel l=new JLabel();
            l.setText("平局，是否再来一局？");
            l.setFont(new Font("",Font.BOLD,20));
            int i=JOptionPane.showConfirmDialog(f2, l,"游戏结束",JOptionPane.YES_NO_OPTION,JOptionPane.PLAIN_MESSAGE);
            if(i==JOptionPane.YES_NO_OPTION) {
                f2.setVisible(false);
                new MyChessEvent();
            }
        }
    }
}

运行截图: