FULL PRODUCT VERSION :
java version "1.7.0_03"
Java(TM) SE Runtime Environment (build 1.7.0_03-b05)
Java HotSpot(TM) Client VM (build 22.1-b02, mixed mode, sharing)


ADDITIONAL OS VERSION INFORMATION :
Windows Vista Home Premium

A DESCRIPTION OF THE PROBLEM :
No compile time error is thrown on changing an instance method in superclass the to a class method in subclass.

Basically this table in the Summary section of following link does not hold true anymore :-
http://docs.oracle.com/javase/tutorial/java/IandI/override.html



REGRESSION. Last worked in version 6u29

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1.create superclass with instance method.
2.create subclass and override the instance method.
3.change type of this method to static.
4.try to compile.


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
compile time error.
ACTUAL -
No compile time error.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package HidingAndOverriding;

public class Animal {
    public static void testClassMethod() {
        System.out.println("The class" +
            " method in Animal.");
    }
    public void testInstanceMethod() {
        System.out.println("The instance "
            + " method in Animal.");
    }
}


package HidingAndOverriding;

public class Cat extends Animal {
    public void testClassMethod() {
        System.out.println("The class method" +
                           " in Cat.");
    }
    public static void testInstanceMethod() {
        System.out.println("The instance method" +
                           " in Cat.");
    }

    public static void main(String[] args) {
        Cat myCat = new Cat();
        Animal myAnimal = myCat;
        Animal.testClassMethod();
        myAnimal.testInstanceMethod();
        new Animal().testInstanceMethod();
    }
}

---------- END SOURCE ----------