mainwindow.java

该文件在eclipse环境上运行

package chat.client;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;

public class MainWindow extends JFrame{
	MainPanel mp;
	LoginPanel lp;
	RegisterPanel rp;
	OnlinePanel op;
	CardLayout cl;
	
	public MainWindow(){
		cl = new CardLayout();
		mp = new MainPanel();
		lp = new LoginPanel();
		rp = new RegisterPanel();
		op = new OnlinePanel();
		this.setLayout(cl);
		this.add(mp, "mp");
		this.add(lp, "lp");
		this.add(rp, "rp");
		this.add(op, "op");
		this.setSize(mp.getWidth(), mp.getHeight());
		this.setVisible(true);
	}
	
	public void show(String name){
		if(name.equals("mp")) {
			this.setSize(mp.getWidth(), mp.getHeight());
		}else if(name.equals("lp")) {
			this.setSize(lp.getWidth(), lp.getHeight());
		}else if(name.equals("rp")){
			this.setSize(rp.getWidth(), rp.getHeight());
		}else{
			this.setSize(op.getWidth(), op.getHeight());
		}
		cl.show(this.getContentPane(), name);
	}
}