cardlayout1.java

来自「翁剀JAVA语言那门课程的教案 很多人都看多他的视频教程可惜没有ppt的教案」· Java 代码 · 共 55 行

//: CardLayout1.java
// Demonstrating the CardLayout
import java.awt.*;
import java.applet.Applet;

class ButtonPanel extends Panel {
	ButtonPanel(String id) {
		setLayout(new BorderLayout());
		add("Center", new Button(id));
	}
}

public class CardLayout1 extends Applet {
	Button
		first = new Button("First"),
		second = new Button("Second"),
		third = new Button("Third");
	Panel cards = new Panel();
	CardLayout cl = new CardLayout();
	public void init() {
		setLayout(new BorderLayout());
		Panel p = new Panel();
		p.setLayout(new FlowLayout());
		p.add(first);
		p.add(second);
		p.add(third);
		add("North", p);
		cards.setLayout(cl);
		cards.add("First card",
		new ButtonPanel("The first one"));
		cards.add("Second card",
		new ButtonPanel("The second one"));
		cards.add("Third card",
		new ButtonPanel("The third one"));
		add("Center", cards);
	}
	
	public boolean action(Event evt, Object arg) {
		if (evt.target.equals(first)) {
			cl.first(cards);
		}
		else if (evt.target.equals(second)) {
			cl.first(cards);
			cl.next(cards);
		}
		else if (evt.target.equals(third)) {
			cl.last(cards);
		}
		else
			return super.action(evt, arg);
		return true;
	}
} ///:~

//	<applet code=CardLayout1.class width=200 height=200></applet>