What are mutable classes?

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Can you declare an interface method static?

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what is struts-config-xml?and its use?

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What are the advantages of defining packages in java?

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How to sort array of 0 and 1 in java?

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Explain the difference between throw and throws in java?

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What is the difference between error and exception and explain in simple words not whatever is given in the book.

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What is difference between “==” and equals()?

1 Answers   IBM,

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interface X{ void m1(); void m2(); } class Child2 extends Object implements X { public void m1(){ System.out.println("Child2 M1"); } public void m2(){ System.out.println("Child2 M2"); } } public class ParentChildInfterfaceDemo { public static void main(String[] args){ X x = new Child2(); X x1 = new Child2(); x.m1(); x.m2(); x.equals(x1); } } Will the above code work? If yes? Can you please explain why the code x.equals(x1) will work as the equals method is called on interface reference vaiable?

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Define iterator and methods in iterator?

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What is a method declaration?

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can two class in a code be public??if yes then how??

2 Answers  

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