import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.Label;
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 QQ {
	public static void main(String[] args) {
		JFrame frame=new JFrame("QQ");
		JPanel jp=new JPanel();
		jp.setLayout(new BorderLayout());
	    jp.add(new JLabel("登入介面",JLabel.CENTER),BorderLayout.NORTH);
	    
	    JPanel jp2=new JPanel();
	    JTextField text=new JTextField();
	    JPasswordField pass=new JPasswordField();
	    
	    jp2.setLayout(new GridLayout(2,2,8,8));
	    jp2.add(new JLabel("UserName",JLabel.CENTER));
	    jp2.add(text);
	    text.setHorizontalAlignment(JTextField.CENTER);

	    jp2.add(new JLabel("Password",JLabel.CENTER));
	    jp2.add(pass);
		pass.setHorizontalAlignment(JTextField.CENTER);
	    jp.add(jp2,BorderLayout.CENTER);
	    
	    JPanel jp1=new JPanel();
	    jp1.add(new JButton("登入"));
	    jp1.add(new JButton("註冊"));
	    jp1.add(new JButton("取消"));
	    jp.add(jp1,BorderLayout.SOUTH);
	    
	    frame.setContentPane(jp);
	    frame.pack();
	    frame.setVisible(true);
	}
}
 

<img src="https://img-blog.csdn.net/20150713203141853" alt="" />