12321213

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Test8 extends JFrame implements ActionListener
{
//static JFrame myfrm=new JFrame("JButton class"); // Java Class JFrame
//static AwtTestEvent myfrm=new AwtTestEvent("JFrame 1 "); // Java Class JFrame
static JTextField tbx1=new JTextField(2); // 建立1文字方塊物件
static JButton buttons[]=new JButton[10];
static JLabel labels[]=new JLabel [10];
public static void main(String args[])
{
Test8 myfrm=new Test8();

String numbers[] = {"0", "1", "2", "3", "4", "5", "6", "7", "8"};
FlowLayout flow=new FlowLayout();
GridLayout grid12= new GridLayout(1,2);
GridLayout grid33= new GridLayout(3,3);
myfrm.setLayout(grid12);
myfrm.setSize(450,450);
JPanel p1 = new JPanel(grid33); //實作 panel 1
for (int i = 0; i < numbers.length; i++)
{
buttons[i] = new JButton(numbers[i]); // create buttons
p1.add(buttons[i], grid33); // 在 panel 1內加入按鈕陣列
}

myfrm.add(p1); // 在視窗myfrm 內加入 panel 1
JPanel p3 = new JPanel(grid33); //實作 panel 3
for (int i = 0; i < numbers.length; i++)
{
labels[i] = new JLabel(); // create labels
p3.add(labels[i], grid33); // 在 panel 1內加入按鈕陣列
}
myfrm.add(p3); // 在視窗myfrm 內加入 panel 3

JPanel p2 = new JPanel(flow); //實作 panel 2
JButton btn1=new JButton("JButton 1"); // 建立按鈕物件 btn1
btn1.addActionListener(myfrm);
p2.add(tbx1); // 在 panel 2內加入文字方塊
p2.add(btn1); // 在 panel 2內加入按鈕

myfrm.add(p2); // 在視窗myfrm 內加入 panel 2


myfrm.setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
String numbers[]={"0","1","2","3","4","5","6","7","8"};
String stringValue;
//stringValue=tbx1.getText();
//int intValue = Integer.parseInt(stringValue);

int rndno = (int) (Math.random()*9);
System.out.println(rndno);
numbers[0] = String.valueOf(rndno);
tbx1.setText(numbers[0]);
buttons[rndno].setBackground(Color.blue);
labels[rndno].setText(numbers[0]);
System.out.println(rndno);
}
}