package bamclient;import javax.swing.*;import javax.swing.border.*;import java.awt.*;public class MainPanel extends JPanel {	JButton registerButton;	JButton loginButton;		public JButton getLoginButton() {		return loginButton;	}	public JButton getRegisterButton() {		return registerButton;	}	//void很重要.	public MainPanel(){		this.registerButton=new JButton("開戶");		this.loginButton=new JButton("登錄");		this.setLayout(new GridLayout(2,1,0,40));		this.setBorder(new EmptyBorder(40,40,40,40));//設置邊框.		add(this.registerButton);		add(this.loginButton);	}}