FooBarBazMumble

Language$/$Type: Java classes inheritance mystery polymorphism

Author: Robert Baxter

Consider the following classes:

public class Foo $\{$

public void method$1()\{$

System.out.println$("$foo $1")$;

method$2()$;

$\}$

public void method$2()\{$

System.out.println$("$foo $2")$;

$\}$

$\}$

public class Bar extends Foo $\{$

public void method$2()\{$

System.out.println$("$bar $2")$;

$\}$

public void method$3()\{$

System.out.println$("$bar $3")$;

$\}$

$\}$

public class Baz extends Foo $\{$

public void method$1()\{$

System.out.println$("$baz $1")$;

$\}$

public void method$2()\{$

System.out.println$("$baz $2")$;

method$1()$;

$\}$

$\}$

public class Mumble extends Baz $\{$

public void method$1()\{$

super.method$1()$;

System.out.println$("$mumble $1")$;

$\}$

public void method$3()\{$

System.out.println$("$mumble $3")$;

$\}$

$\}$

Suppose the following variables are defined:

Foo var$1=$ new Bar$()$;

Foo var$2=$ new Mumble$()$;

Bar var$3=$ new Bar$()$;

Baz var$4=$ new Baz$()$;

Baz var$5=$ new Mumble$()$;

Object var$6=$ new Baz$()$;