package com.xinhua.testswing;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.WindowConstants;
public class JTextFieldTest extends JFrame {
public JTextFieldTest() {
Container cont = getContentPane();
//此处要使用绝对布局,所以要取消布局管理器
setLayout(null);
//
cont.setLayout(new FlowLayout(3,10,10));
final JTextField jt = new JTextField("aaa", 20);
jt.setBounds(0, 0, 100, 100);
final JButton jb = new JButton("Clear");
jb.setBounds(200, 200, 150, 100);
jt.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
//此处要在文本框中按下回车键才能显示
jt.setText("触发事件");
}
});
jb.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
jt.setText("");
jt.requestFocus();
}
});
cont.add(jt);
cont.add(jb);
JButton jb2 = new JButton("DDDDs");
jb2.setBounds(400, 400, 150, 50);
cont.add(jb2);
//
setSize(800,800);
setBounds(0,0,800,800);
setVisible(true);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new JTextFieldTest();
}
}