程序写不下去了，求高人帮忙

[caoliang3621]

这个程序是随机产生两个数字，求他们的乘法，要求输入答案到jtextfield，如果正确，使用paint方法显示成功，才能继续下一个题，如果输入错误，则显示失败，继续做这个题，只有成功才能继续下一题，我写的代码如下，后面的写不下去了，请大家帮帮忙
现在不知道如何对两个jbutton 如何监听，以及点击button后如何调用paint方法

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

public class TextMath extends JApplet implements ActionListener{
 JLabel jlabel1,jlabel2,jlabel3;
 JTextField jtext1,jtext2,jtext3;
 JButton rollButton,rollButton1;
 int num,count;
 

 public void init(){
  Container container = getContentPane();
  container.setLayout(new FlowLayout());
  
  jlabel1 = new JLabel("First number");
  jtext1 = new JTextField(10);
  jtext1.setEditable(false);
  container.add(jlabel1);
  container.add(jtext1);
  
  jlabel2 = new JLabel("scond number");
  jtext2 = new JTextField(10);
  jtext2.setEditable(false);
  container.add(jlabel2);
  container.add(jtext2);
  
  jlabel3 = new JLabel("sum is");
  jtext3 = new JTextField(10);
  container.add(jlabel3);
  container.add(jtext3);
  
  rollButton = new JButton("next");
  rollButton.addActionListener(this);
  container.add(rollButton);
  rollButton1 = new JButton("确定");
  rollButton1.addActionListener(this);
  container.add(rollButton1);
  
  
 }
 public void actionPerformed(ActionEvent actionevent){
  
  if(actionevent.getActionCommand().equals("next")){
   num = rollDice();
   showStatus("How much is"+jtext1.getText()+"time"+jtext2.getText()+"?");
  }
  if(actionevent.getActionCommand().equals("确定")){
  }

 }
 public int rollDice(){
  int die1,die2,sum;
  
  die1 = 1 + (int)(Math.random()*10);
  die2 = 1 + (int)(Math.random()*10);
  sum = die1*die2;
  jtext1.setText(Integer.toString(die1));
  jtext2.setText(Integer.toString(die2));
  return sum;
 }
public void paint(Graphics g){
  num = rollDice();
  super.paint(g);
  count = Integer.parseInt(jtext3.getText().trim());
  if(count == num){
  g.drawString("Very good", 50, 50);
  }
 }
} 

[捏造的信仰]

不会用 paint，直接显示在 JLabel 上不行啊？

[都市巴巴]

JApplet 没用过，不过可以回答两个东东
1、 rollButton.addActionListener(this);
这个其实就是增加监听器 ，只有加了这个，actionPerformed里面的相应事件才会被监听到。
2、及点击button后如何调用paint方法，Canvas里面可以用repaint方法。。这个里面可以试试

[daisycool]

帮你写了这个，其中添加按钮监听的方法有些特别，但是我觉得这样能使代码好看些。虽然在我的代码里你可以用Button来paint，但是1楼的方法更简单些，直接改变JLable的值然不是更好吗。供你参考吧，方法你自己选择决定。

import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class TwoButtons extends JPanel{
	
	public static void main(String args[]) {
		JFrame frame = new JFrame();
		
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		TwoButtons tb = new TwoButtons();
		frame.add(tb);
		frame.setPreferredSize(new Dimension(800, 600));
		frame.setBounds(0, 0, 800, 600);
		frame.validate();
		
		frame.setVisible(true);
	}
	
	public TwoButtons() {
		initComp();
	}

	public void initComp() {
		this.setLayout(new FlowLayout());
		this.setPreferredSize(new Dimension(800, 600));
		
		JButton b1 = new JButton("Button1");
		JButton b2 = new JButton("Button2");
		
		b1.addActionListener(new TwoButtons_button1_actionAdapter(this));
		b2.addActionListener(new TwoButtons_button2_actionAdapter(this));
		
		this.add(b1);
		this.add(b2);
	}
	
	public void paintWithoutPassingInGraphics1() {
		Graphics g = this.getGraphics();
		g.drawLine(0, 0, 300, 300);
	}
	
	public void paintWithoutPassingInGraphics2() {
		Graphics g = this.getGraphics();
		g.drawLine(300, 300, 500, 300);
	}
	
	/** Action Handlers **/
	public void b1_actionPerformed(ActionEvent e) {
		paintWithoutPassingInGraphics1();
	}
	
	public void b2_actionPerformed(ActionEvent e) {
		paintWithoutPassingInGraphics2();
	}
}

class TwoButtons_button1_actionAdapter implements ActionListener {
	
	private TwoButtons adaptee;
	
	TwoButtons_button1_actionAdapter(TwoButtons adaptee) {
		this.adaptee = adaptee;
	}

	public void actionPerformed(ActionEvent e) {
		adaptee.b1_actionPerformed(e);
	}
	
}

class TwoButtons_button2_actionAdapter implements ActionListener {
	
	private TwoButtons adaptee;
	
	TwoButtons_button2_actionAdapter(TwoButtons adaptee) {
		this.adaptee = adaptee;
	}

	public void actionPerformed(ActionEvent e) {
		adaptee.b2_actionPerformed(e);
	}
	
}