JAVA中GUI登錄界面設計源代碼是什么？

import java.awt.BorderLayout;

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import java.awt.Container;

import java.awt.FlowLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JPasswordField;

import javax.swing.JTextField;

public class Login {

private JFrame frame = new JFrame("登錄");

private Container c = frame.getContentPane();

private JTextField username = new JTextField();

private JPasswordField password = new JPasswordField();

private JButton ok = new JButton("確定");

private JButton cancel = new JButton("取消");

public Login(){

frame.setSize(300,200);

c.setLayout(new BorderLayout());

initFrame();

frame.setVisible(true);

}

private void initFrame() {

//頂部

JPanel titlePanel = new JPanel();

titlePanel.setLayout(new FlowLayout());

titlePanel.add(new JLabel("系統管理員登錄"));

c.add(titlePanel,"North");

//中部表單

JPanel fieldPanel = new JPanel();

fieldPanel.setLayout(null);

JLabel l1 = new JLabel("用戶名:");

l1.setBounds(50, 20, 50, 20);

JLabel l2 = new JLabel("密 碼:");

l2.setBounds(50, 60, 50, 20);

fieldPanel.add(l1);

fieldPanel.add(l2);

username.setBounds(110,20,120,20);

password.setBounds(110,60,120,20);

fieldPanel.add(username);

fieldPanel.add(password);

c.add(fieldPanel,"Center");

//底部按鈕

JPanel buttonPanel = new JPanel();

buttonPanel.setLayout(new FlowLayout());

buttonPanel.add(ok);

buttonPanel.add(cancel);

c.add(buttonPanel,"South");

}

public static void main(String[] args){

new Login();

}

}

JAVA GUI 代碼問題

因為你在主線程中調用了Threed.sleep(1000) 那么主線程就一直在這里暫停.沒機會顯示數字.

然后當主線程恢復的時候, 如果你設置shuzi.setVisible(true);那么就直接消失了

修改參考,

Thread?t?=?new?Thread(new?Runnable()?{

public?void?run()?{

try?{

Thread.sleep(1000);

shuzi.setVisible(false);//設置不可見

}?catch?(Exception?e1)?{

return;

}

}

});

t.start();//啟動

JAVA GUI代碼問題

import?java.awt.*;

import?java.awt.event.*;

import?javax.swing.*;

class?aa?implements?ActionListener?{

JButton?jb;

public?aa(JButton?jb)?{//構造器,把JButton傳遞進來,

this.jb?=?jb;

}

public?void?actionPerformed(ActionEvent?e)?{

jb.setVisible(false);//設置jbutton不可見

}

}

public?class?J1?extends?JFrame{

JButton?j1?=?new?JButton("Game1");

JButton?j2?=?new?JButton("Game2");

J1(){

setTitle("Game");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container?c?=?getContentPane();

c.setLayout(new?FlowLayout());

c.add(j1);

c.add(j2);

j1.addActionListener(new?aa(j1));//把j1這個按鈕傳遞進過去

j2.addActionListener(new?aa(j2));//把j2這個按鈕傳遞進過去

setSize(400,400);

setVisible(true);

}

public?static?void?main(String[]?args)?{

new?J1();

}

}

效果圖