用Java实现简单的用户登录界面

一个用Java实现简单的用户登录界面：
成效：

具体代码：

package Code.a;
import java.awt.*;
import javax.swing.*;
import javax.swing.border.Border;
public class LogIn {
	JFrame logframe;
	JPanel panel1,panel2,panel3;
	JLabel labelusername,labelpassword;
	JTextField username;
	JPasswordField password;
	JButton logbutton;
	JButton resetbutton;
	public LogIn() {
		//创建*容器；
		logframe = new JFrame("登录");
		logframe.setSize(300,200);
		//创建三个中间容器panel1，panel2，panel3；
		//panel1包括一个label、一个text；
		panel1 = new JPanel();
		panel1.setSize(300,50);										//设置大小
		panel1.setBackground(Color.white);							//设置背景颜色
		panel1.setBorder(BorderFactory.createLoweredBevelBorder()); //设置边框
		panel1.setLayout(new FlowLayout()); 						//设置布局为流式布局
		labelusername = new JLabel("用户名");						
		labelusername.setSize(80,40);
		username = new JTextField(20);
		username.setSize(200,40);
		panel1.add(labelusername);
		panel1.add(username);
		//panel2包括一个label、一个text；
		panel2 = new JPanel();
		panel2.setSize(300,50);
		panel2.setBackground(Color.white);
		panel2.setBorder(BorderFactory.createLoweredBevelBorder());
		panel2.setLayout(new FlowLayout());
		labelpassword = new JLabel("密码");
		labelpassword.setSize(80,40);
		password = new JPasswordField(20);
		password.setEchoChar('*');
		password.setSize(200,40);
		panel2.add(labelpassword);
		panel2.add(password);
		//panel3包括一个label、一个text；
		panel3 = new JPanel();
		panel3.setSize(300,50);
		panel3.setBackground(Color.white);
		panel3.setBorder(BorderFactory.createLoweredBevelBorder());
		panel3.setLayout(new FlowLayout());
		logbutton = new JButton("登录");
		logbutton.setSize(50,30);
		resetbutton = new JButton("重置");
		resetbutton.setSize(50,30);
		panel3.add(logbutton);
		panel3.add(resetbutton);
		//*容器添加三个中间容器
		logframe.add(panel1);
		logframe.add(panel2);
		logframe.add(panel3);
		logframe.setLayout(new FlowLayout());						//设置布局为流式布局
		logframe.setVisible(true);									//设置可见
		logframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		new LogIn();

	}

}