java课程程序设计-----一个类似QQ登录的界面

import javax.swing.JFrame;//框架
import javax.swing.JPanel;//面板
import javax.swing.JButton;//按钮
import javax.swing.JLabel;//标签
import javax.swing.JTextField;//文本框
import java.awt.Font;//字体
import java.awt.Color;//颜色
import javax.swing.JPasswordField;//密码框
import java.awt.event.ActionListener;//事件监听
import java.awt.event.ActionEvent;//事件处理
import javax.swing.JOptionPane;//消息窗口
public class UserLogIn extends JFrame{
public JPanel p1;
public JLabel p2;
public JLabel p3;
public JLabel p4;
public JTextField p5;
public JPasswordField p6;
public JButton p7;
public JButton p8;

public UserLogIn(){
p1 = new JPanel();
p2 = new JLabel();
p3 = new JLabel();
p4 = new JLabel();
p5 = new JTextField();
p6 = new JPasswordField();
p7 = new JButton();
p8 = new JButton();
userInit();
}

public void userInit(){
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置关闭框架的同时结束程序
this.setSize(300,200);//设置框架大小为长300,宽200
this.setResizable(false);//设置框架不可以改变大小
this.setTitle("登录");//设置框架标题
this.p1.setLayout(null);//设置面板布局管理
this.p1.setBackground(Color.yellow);//设置面板背景颜色
this.p2.setText("用户登录");//设置标签标题
this.p2.setFont(new Font("宋体",Font.BOLD | Font.ITALIC,14));//设置标签字体
this.p2.setForeground(Color.blue);//设置标签字体颜色
this.p3.setText("用户名:");
this.p4.setText("密    码:");
this.p7.setText("登录");
this.p8.setText("重置");
this.p2.setBounds(130,20,60,20);//设置标签x坐标130,y坐标20,长60,宽20
this.p3.setBounds(50,55,60,20);
this.p4.setBounds(50,85,60,25);
this.p5.setBounds(110,55,120,20);
this.p6.setBounds(110,85,120,20);
this.p7.setBounds(85,120,60,20);
this.p7.addActionListener(new ActionListener()//匿名类实现ActionListener接口
{
public void actionPerformed(ActionEvent e){
p7_ActionEvent(e);
}
}
);
this.p8.setBounds(190,120,60,20);
this.p8.addActionListener(new ActionListener()//匿名类实现ActionListener接口
{
public void actionPerformed(ActionEvent e){
p8_ActionEvent(e);
}
}
);
this.p1.add(p2);//加载标签到面板
this.p1.add(p3);
this.p1.add(p4);
this.p1.add(p5);
this.p1.add(p6);
this.p1.add(p7);
this.p1.add(p8);
this.add(p1);//加载面板到框架
this.setVisible(true);//设置框架可显
}

public void p7_ActionEvent(ActionEvent e){
String name = p5.getText();
String pwd = String.valueOf(p6.getPassword());
if(name.equals("")){
JOptionPane.showMessageDialog(null,"账号不能为空","错误",JOptionPane.ERROR_MESSAGE);
return;
}else
if (pwd.equals("")){
JOptionPane.showMessageDialog(null,"密码不能为空","错误",JOptionPane.ERROR_MESSAGE);
return;

}else
if(p5.getText().trim().equals("abc")&&(p6.getText().trim().equals("123"))){

JOptionPane.showMessageDialog(null, "恭喜您登陆成功!", "消息", JOptionPane.INFORMATION_MESSAGE);
this.dispose();
}else{
JOptionPane.showMessageDialog(null,"账号或密码错误","错误",JOptionPane.ERROR_MESSAGE);
return;
}	}
public void p8_ActionEvent(ActionEvent e){
p5.setText("");
p6.setText("");
}
public static void main(String[] args){
new UserLogIn();
}
}