If the main class is located in the enclosing class of a Java file,  launching debugger will throw error `Failed to resolve classpath 'Main$Main1' doesn't exist in the workspace`. Actually the class exists. 
If the main class is located in the enclosing class of a Java file,
launching debugger will throw error
Failed to resolve classpath 'Main$Main1' doesn't exist in the workspace. Actually the class exists.