jbuilder为什么运行程序总是出错????
import java.awt.*;
public class netpp{
public static void main(String args[]){
Frame f=new Frame("aaaa");
f.setSize(200,200);
f.setBackground(Color.blue);
f.setVisible(true);
}
}
选择run ->run "netpp" using defaults
出现错误对话框 could not find the main class,program will exit!
D:\JBuilder9\jdk1.4\bin\javaw -classpath "D:\Documents and Settings\Administrator\jbproject\classes;D:\JBuilder9\jdk1.4\demo\jfc\Java2D\Java2Demo.jar;D:\JBuilder9\jdk1.4\demo\plugin\jfc\Java2D\Java2Demo.jar;D:\JBuilder9\jdk1.4\jre\lib\charsets.jar;D:\JBuilder9\jdk1.4\jre\lib\ext\dnsns.jar;D:\JBuilder9\jdk1.4\jre\lib\ext\ldapsec.jar;D:\JBuilder9\jdk1.4\jre\lib\ext\localedata.jar;D:\JBuilder9\jdk1.4\jre\lib\ext\sunjce_provider.jar;D:\JBuilder9\jdk1.4\jre\lib\im\indicim.jar;D:\JBuilder9\jdk1.4\jre\lib\jaws.jar;D:\JBuilder9\jdk1.4\jre\lib\jce.jar;D:\JBuilder9\jdk1.4\jre\lib\jsse.jar;D:\JBuilder9\jdk1.4\jre\lib\rt.jar;D:\JBuilder9\jdk1.4\jre\lib\sunrsasign.jar;D:\JBuilder9\jdk1.4\lib\dt.jar;D:\JBuilder9\jdk1.4\lib\htmlconverter.jar;D:\JBuilder9\jdk1.4\lib\tools.jar" netpp
java.lang.NoClassDefFoundError: netpp
Exception in thread "main"
这是怎么回事呢?