turing514
发贴: 2
积分: 0
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于 2006-07-27 14:00
package map; import java.awt.event.*; import java.awt.*; import javax.swing.*; /** * <p>Title: </p> * * <p>Description: </p> * * <p>Copyright: Copyright 2006</p> * * <p>Company: </p> * * @author not attributable * @version 1.0 */ public class test extends JFrame { public test() { super("Map"); setSize(500,500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); MapPane map1=new MapPane(); Container content =(JPanel)getContentPane(); content.add(map1); }
public static void main(String[] args) { test Frame = new test(); Frame.show(); } } class MapPane extends JFrame{ public void paintComponent(Graphics comp){ Graphics comp2D =(Graphics2D)comp; comp2D.drawString("haiwang",100,100); } } 编译是老出现错误(本程序是21天学通java的现成的程序): java.lang.IllegalArgumentException: adding a window to a container at java.awt.Container.addImpl(Container.java:616) at java.awt.Container.add(Container.java:307) at map.test.<init>(test.java:24) at map.test.main(test.java:28) Exception in thread "main" 各个大虾给说说为什么?
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