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

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IN java collections we have both interfaces and classes. instead of using interfaces why we can't use classes only like that why we can't use interfaces only. why we need two things interface and class.

6 Answers   Accenture, CTS,

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Can java object be locked down for exclusive use by a given thread?

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What is local declaration?

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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 } }

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What are different types of states exist for a thread?

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What is module in project?

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What is a line break example?

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what is anonymous class in java?

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What is casting in java programming?

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What is gui programming?

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What are java packages? What is the significance of packages?

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