Java学习笔记（AWT组件 之 按钮）

没什么说的，就是当按钮被按下后，会产生ActionEvent 事件，需要用 ActionListener 接口进行监听和处理事件。

下面是一个菜数字大小的游戏

package frame;import java.awt.event.*;import java.awt.*;class WindowButton extends Frame implements ActionListener{int number;Label  prompt = new Label("提示条");TextField inputs = new TextField("输入框");Button buttonGetNumber, buttonEnter;WindowButton(String str){super(str);setLayout(new FlowLayout());buttonGetNumber = new Button(" 得到一个随机数");add(buttonGetNumber);prompt = new Label(" 输入你行猜的数字", Label.CENTER);prompt.setBackground(Color.cyan);inputs = new TextField("0",10);add(prompt);add(inputs);buttonEnter = new Button("确定");add(buttonEnter);buttonEnter.addActionListener(this);buttonGetNumber.addActionListener(this);setBounds(100, 100, 150, 150);setVisible(true);validate();}public void actionPerformed(ActionEvent e) {if(e.getSource() == buttonGetNumber){number = (int) (Math.random() * 100) + 1;prompt.setText("输入你的猜测");}else if(e.getSource() == buttonEnter){int guess = 0;try{guess = Integer.parseInt(inputs.getText());if(guess == number){prompt.setText("你才对了");}else if(guess > number){prompt.setText("你猜小了");}else if(guess < number){prompt.setText(" 你才打了");}}catch (NumberFormatException event){prompt.setText("请输入数字");}}}}public class Fra{public static void main(String ars[]){WindowButton win = new WindowButton("窗口");}}