Take a look at following Class file.
package com.test;
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello World! How are you?");
}
}
Following are steps to reproduce the java.lang.NoClassDefFoundError.
java.lang.NoClassDefFoundError: HelloWorld (wrong name: com/test/HelloWorld)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Following happens when you start JVM using “java HelloWorld.java”:
Take a look at following Class file.
package com.test;
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello World! How are you?");
}
}
Do following to print “Hello World! How are you?”:
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