java登录界面swing源码实例说明，举例介绍源码注释说明，java图形设计等。

import java.awt.*;
import java.sql.*;
import javax.swing.*;
import java.awt.event.*;

public class Enter extends JFrame
{Frame f;
private  JTextField text=new JTextField();
private JPasswordField txt=new JPasswordField();
private JButton but1=new JButton(“登陆”);
private JButton but2=new JButton(“注册”);
private JButton but3=new JButton(“退出”);
private static ImageIcon imgIcon=new ImageIcon(“enter.jpg”);
private static Image img=imgIcon.getImage();

public Enter(String title){
super (title);
BPanel jp=new BPanel();
jp.setVisible(true); //设置面板可见、不透明
jp.setOpaque(false);

setLayout(null);
but1.setBounds(115,130,60,35);
text.setBounds(115,50,200,25);
txt.setBounds(115,85,200,25);
but2.setBounds(220,135,80,30);
but3.setBounds(280,180,100,25);
jp.setBounds(0,0,400,350);
this.getContentPane().add(text);
this.getContentPane().add(txt);
this.getContentPane().add(but1);
this.getContentPane().add(but2);
this.getContentPane().add(but3);
this.getContentPane().add(jp);
}
static class BPanel extends JPanel{//定义方法BPanel
protected void paintComponent(Graphics g){
super.paintComponent(g);
g.drawImage(img,0,0,this); }//在面板中画图
}
public static void main(String args[]){
Enter en=new Enter(“登陆”);
en.setSize(400,250);
en.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
en.setVisible(true);

}

} 本文链接地址: java登录界面swing源码实例说明