Is simpledateformat safe to use in the multithreaded program?

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Can we convert stringbuilder to string in java?

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Which is the best approach for creating thread ?

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In which way does a Primitive data type is passed ?

5 Answers   Sun Microsystems,

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we cannot create an object of interface but we can create a variable of it

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Can an integer be null java?

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What is jar?

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When does Exception occurs?

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What is string in java? String is a data type?

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abstract class Demo { public void show() { System.out.println("Hello I am In show method of Abstract class"); } } class Sample extends Demo { public void show() { super.show(); System.out.println("Hello I am In Sample "); } } public class Test { public static void main(String[] args) { //I WANT TO CALL THE METHOD OF BASE CLASS IT IS POSSIBLE OR NOT CAN WE USE SCOPE RESOLUTION OPERATOR TO CALL OR JAVA NOT SUPPORTED THAT :: OPERATORE } }

3 Answers  

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What is a singleton class? Give a practical example of its usage.

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What do you mean by an interface in java?

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