Question

What will be the name of the .class file when local classes with same name are present in more than one instance method of same class? How can JVM differentiate these local classes?

Answer 1

With both local classes and anonymous classes the compiler adds a number to the generated name.

Compiling the below code produced classes Test.class, Test$1Local.class, Test$2Local.class and Test$1Another.class so the compiler (jdk1.6.0_24) always adds a number to the name (maybe to avoid conflicts with inner classes) and if there are two local classes with the same name then it increments the number to avoid conflicts.

public class Test {
    public void foo() {
        class Local {
        }
    }

    public void bar() {
        class Local {
        }
    }

    public void baz() {
        class Another {
        }
    }
}