文本框——TextField 的使用

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
public class Ex_TextField extends Frame{
	TextField t1,t2,t3,t4;
	Panel panel;
	public Ex_TextField(String title) {
		super(title);
		t1 = new TextField();//无初始文本
		t2 = new TextField(20);//仅指文本宽度
		t3 = new TextField("初始文本");//仅指定初始文本
		t4 = new TextField("初始文本",20);//指定初始文本和宽度
		panel =new Panel();
		panel.add(t1);
		panel.add(t2);
		panel.add(t3);
		panel.add(t4);
		add(panel);
		setSize(400,200);
		setVisible(true);
		addWindowListener(new WindowAdapter() {public void windowClosing(WindowEvent e) {System.exit(0);}});
	}
	public static void main(String[] args) {
		new Ex_TextField("文本");//窗体名字
	}
}