java事件处理模型知识点总结

package Swing;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Event_Exam extends JFrame implements ActionListener {
static Event_Exam mainJFrame=new Event_Exam();
static JLabel labl1,labl2;
static JLabel showlb1=new JLabel("0");
static JLabel showlb2=new JLabel("0.0");
static JTextField text1,text2;
public static void main(String[] args) {
// TODO Auto-generated method stub
mainJFrame.setTitle("操作事件示例！");
mainJFrame.setSize(200, 160);
Container container=mainJFrame.getContentPane();
container.setLayout(new FlowLayout());
labl1=new JLabel("输入整数型：");
container.add(labl1);
text1=new JTextField("0",10);
text1.addActionListener(mainJFrame);//把监听者mainJFrame向事件源text1注册
container.add(text1);
labl2=new JLabel("输入浮点数：");
container.add(labl2);
text2=new JTextField("0.0",10);
text2.addActionListener(mainJFrame);//把监听者mainJFrame向事件源text2注册
container.add(text2);
showlb1.setForeground(Color.blue);
showlb1.setHorizontalTextPosition(SwingConstants.LEFT);
showlb2.setForeground(Color.green);
showlb2.setHorizontalTextPosition(SwingConstants.LEFT);
container.add(showlb1);
container.add(showlb2);
mainJFrame.setVisible(true);
}
public void actionPerformed(ActionEvent e) {//事件发生时的处理操作
//提取文本框内容并显示在showlb1、showlb2中
showlb1.setText("整数为"+text1.getText());
showlb2.setText("浮点数为"+text2.getText());
}
}