logo Practice-It logo

FooBarBazMumble

Author: Robert Baxter

Consider the following classes:

public class Foo {
    public void method1() {
        System.out.println("foo 1");
        method2();
    }

    public void method2() {
        System.out.println("foo 2");
    }
}

public class Bar extends Foo {
    public void method2() {
        System.out.println("bar 2");
    }

    public void method3() {
        System.out.println("bar 3");
    }
}

public class Baz extends Foo {
    public void method1() {
        System.out.println("baz 1");
    }

    public void method2() {
        System.out.println("baz 2");
        method1();
    }
}

public class Mumble extends Baz {
    public void method1() {
        super.method1();
        System.out.println("mumble 1");
    }

    public void method3() {
        System.out.println("mumble 3");
    }
}

Suppose the following variables are defined:

Foo var1 = new Bar();
Foo var2 = new Mumble();
Bar var3 = new Bar();
Baz var4 = new Baz();
Baz var5 = new Mumble();
Object var6 = new Baz();

Indicate on each line below the output produced by each statement shown. If the statement produces more than one line of output indicate the line breaks with slashes as in a/b/c to indicate three lines of output with a followed by b followed by c. If the statement causes an error, write the word error to indicate this.

var1.method1();
var2.method1();
var3.method1();
var4.method1();
var5.method1();
var6.method1();
var1.method2();
var2.method2();
var3.method2();
var4.method2();
var5.method2();
var6.method2();
var3.method3();
var5.method3();
((Bar) var1).method3();
((Mumble) var4).method3();
((Mumble) var5).method3();
((Baz) var2).method3();
((Baz) var2).method2();
((Mumble) var6).method2();

You must log in before you can solve this problem.


Log In

If you do not understand how to solve a problem or why your solution doesn't work, please contact your TA or instructor.
If something seems wrong with the site (errors, slow performance, incorrect problems/tests, etc.), please

Is there a problem? Contact a site administrator.