Question

setLayout(new BorderLayout());报错，一下是代码，在myeclipse中运行

import java.applet.Applet;
import java.awt.*;

public class BorderLayout extends Applet {
private Button centerButton, eastButton, northButton, westButton, southButton;

public void init(){
setLayout(new BorderLayout());

centerButton = new Button("center Button");
westButton = new Button("west Button");
eastButton = new Button("east Button");
southButton = new Button("south Button");
northButton = new Button("north Button");

add("South", southButton);
add("North", northButton);
add("East", eastButton);
add("West", westButton);
add("Center", centerButton);
}
}
结果java.lang.ClassCastException: dy0415.BorderLayout
at dy0415.BorderLayout.init(BorderLayout.java:10)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Answer 1

你看看setLayout()方法要求传什么类型值进去，然后再看看你传的是什么类型。