MyEclipse configuration jdk1.7 run-time error

Question

My operating system is: fedora 18/32 bit
MyEclipse version is: 10
1. First I uninstall the system comes with: open - jdk1.6 [forced discharge]
2. Then from oracle website and download the latest version of the jdk1.7
3. I am in terminal execution javac, and Java compiler take package statement Java files can be normal operation.
4. When I will jdk1.7 [local system, not MyEclipse own] attached to the MyEclipse and no error, when I was in MyEclipse inside implementation class, tip: could not find the main class or unable to load.
Question:
Please inform me about how to install your own MyEclipse additional the JDK. Or how to repair this problem? thank you
The Java file is as follows:
package com.w1520.test
public class Test{
public static void main (String []args){
            System.out.println("Hello World");//
Exception:
Exception in thread "main" java.lang.NoClassDefFoundError: JavaDemo (wrong name: com/w1520/JavaDemo/JavaDemo)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)Edited by: 989477 on 2013-2-21 上午3:15

Answer 1

I agree with gimbal. Find a MyEclipse support forum.
Moderatpr action: I'm locking this thread.