Java开发GUI之CardLayout卡片布局

	static Panel cardPannel;
	
	static void CardLayoutTest(){
		Frame frame = new Frame("Label");
		Panel top = new Panel();
		Choice choice = new Choice();
		choice.add("BUTTON");
		choice.add("LABEL");
		choice.addItemListener(new CardLayoutChoiceListener());
		top.add(choice);
		
		CardLayout layout = new CardLayout();
		cardPannel = new Panel(layout);
		Panel p1 = new Panel();
		p1.add(new Button("one"));
		p1.add(new Button("two"));
		p1.add(new Button("three"));
		cardPannel.add("BUTTON", p1);
		Panel p2 = new Panel();
		p2.add(new Label("label"));
		p2.add(new Label("label"));
		p2.add(new Label("label"));
		cardPannel.add("LABEL", p2);
		top.add(cardPannel);
		
		frame.add(top);
		frame.pack();
		frame.show();
	}

class CardLayoutChoiceListener implements ItemListener{

	@Override
	public void itemStateChanged(ItemEvent e) {
		// TODO Auto-generated method stub
		((CardLayout)APP.cardPannel.getLayout()).show(APP.cardPannel, (String) e.getItem());
	}
	
}

//默认的构造方法
public CardLayout();
//构造方法 hgap设置卡片水平间距 vgap设置卡片竖直间距 
public CardLayout(int hgap, int vgap);
//获取水平间距
public int getHgap();
//设置水平间距
public void setHgap(int hgap);
//获取竖直间距
public int getVgap();
//设置竖直间距
public void setVgap(int vgap);
//显示第一个卡片界面 parent为父容器
public void first(Container parent);
//显示下一个卡片界面
public void next(Container parent);
//显示上一个卡片界面
public void previous(Container parent);
//显示最后一个卡片界面
public void last(Container parent);
//显示指定名称的卡片界面
public void show(Container parent, String name);