Java example source code file (NestedInnerClassNames.java)

This example Java source code file (NestedInnerClassNames.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

error, nestedinnerclassnames

The NestedInnerClassNames.java Java example source code

/*
 * @test  /nodynamiccopyright/
 * @bug 4037746 4277279 4350658 4785453
 * @summary Verify that an inner class cannot have the same simple name as an enclosing one.
 * @author William Maddox (maddox)
 *
 * @compile/fail/ref=NestedInnerClassNames.out -XDrawDiagnostics NestedInnerClassNames.java
 */

/*
 * This program should compile with errors as marked.
 */

public class NestedInnerClassNames {

    class NestedInnerClassNames {}              // ERROR

    void m1() {
        class NestedInnerClassNames {}          // ERROR
    }

    class foo {
        class foo { }                           // ERROR
    }

    void m2 () {
        class foo {
            class foo { }                       // ERROR
        }
    }

    class bar {
        class foo { }
        class NestedInnerClassNames {}          // ERROR
    }

    void m3() {
        class bar {
            class foo { }
            class NestedInnerClassNames {}      // ERROR
        }
    }

    class baz {
        class baz {                             // ERROR
            class baz { }                       // ERROR
        }
    }

    void m4() {
        class baz {
            class baz {                         // ERROR
                class baz { }                   // ERROR
            }
        }
    }

    class foo$bar {
        class foo$bar {                         // ERROR
            class foo { }
            class bar { }
        }
    }

    void m5() {
        class foo$bar {
            class foo$bar {                     // ERROR
                class foo { }
                class bar { }
            }
        }
    }

    class $bar {
        class foo {
            class $bar { }                      // ERROR
        }
    }

    void m6() {
        class $bar {
            class foo {
                class $bar { }                  // ERROR
            }
        }
    }

    class bar$bar {
        class bar {
            class bar{ }                       // ERROR
        }
    }

    void m7() {
        class bar$bar {
            class bar {
                class bar{ }                   // ERROR
            }
        }
    }

    // The name of the class below clashes with the name of the
    // class created above for 'class foo { class foo {} }'.
    // The clash follows from the naming requirements of the inner
    // classes spec, but is most likely a specification bug.

    // Error may be reported here.  See 4278961.
    // As of Merlin-beta b21, this now results in an error.
    class foo$foo { }                           // ERROR

}