importjavax.swing.*;importjava.util.Random;importjava.awt.*;importjava.awt.event.*;importjavax.swing.JLabel.*;publicclassMultiextendsJFrameimplementsActionListener{privat...import javax.swing.*;import java.util.Random;import java.awt.*;import java.awt.event.*;import javax.swing.JLabel.*;public class Multi extends JFrame implements ActionListener{private JLabel label;private JLabel label1;private JTextField field;private JButton button;public Random random= new Random();//随机变量int a=1+random.nextInt(9);int b=1+random.nextInt(9);public static void main(String args[])//main方法{Multi frame=new Multi();frame.setSize(400,400);frame.createGUI();frame.show();}private void createGUI()//建立用户界面{setDefaultCloseOperation(EXIT_ON_CLOSE);Container window=getContentPane();window.setLayout(new FlowLayout());label=new JLabel("how much is "+a+" times "+b+"");window.add(label);field=new JTextField(20);window.add(field);field.addActionListener(this);button=new JButton(" OK ");window.add(button);button.addActionListener(this);//label1=new JLabel("");//window.add(label1);}public void actionPerformed(ActionEvent event)//静态方法play{int e=1;while(e==1){int d=1;while(d==1){int number = Integer.parseInt(field.getText());int c=a*b;if (c==number){d=0;//结束本循环}else{d=1;String message1=String.format("No.Please try again!");JOptionPane.showMessageDialog( null, message1 );}}String message2=String.format( "very good!");JOptionPane.showMessageDialog( null, message2 );}}}展开
}

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}