java 可視化界面編程

import java.awt.Color;

import java.awt.Frame;

import java.awt.GridLayout;

import java.awt.Label;

import java.awt.TextField;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

public class awttest

{

TextField id,pw;

TextField printid,printpw;

public awttest(){

Frame f=new Frame("用戶登錄");

f.setLayout(new GridLayout(4,2));

id=new TextField("輸入用戶名",10);

pw=new TextField(10);

pw.setEchoChar('*');

f.add(new Label("用戶名:",Label.CENTER));

f.add(id);

f.add(new Label("密碼:",Label.CENTER));

f.add(pw);

Button b1=new Button("登陸");

Button b2=new Button("取消");

f.add(b1);

f.add(b2);

String str1=id.getText();

String str2=pw.getText();

printid=new TextField(str1,10);

printpw=new TextField(str2,10);

f.add(printid);

f.add(printpw);

f.pack();

printid.setBackground(new Color(220,0,0));

printpw.setBackground(new Color(220,0,0));

f.setSize(250,120);

f.setVisible(true);

b1.addActionListener(new ActionListener() { // 點擊“顯示窗口”菜單後將窗口顯示出來

public void actionPerformed(ActionEvent e) {

printid.setText(id.getText());

printpw.setText(pw.getText());

}

});

f.addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent args)

{

System.exit(0);

}

}

);

}

public static void main(String[] args){

new awttest();

}

}

OK！！可以運行