Explain Public static void main?

2 Answers   IBM, Vetech,

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explain different ways of using thread? : Java thread

0 Answers  

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suppose in a class there is a code like this: { Set hs=new Hashset(); hs.add(new Emp("kathy",1000)); hs.add(new Emp("kathy",2000)); } how can u avoid the above code in your class as set won't allow duplicate objects?

3 Answers  

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what are the oops concept in java explain with real time examples

24 Answers   Accenture, Bosch, Consummate Technologies, CTS, Current Technologies, iNautix, Infosys, Kekran Mekran, QA InfoTech, RTRT, SofTech, Tech Mahindra, Thorogood, Timios, Wipro,

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Can a static class have a constructor?

0 Answers  

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How many static init can you have?

0 Answers  

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What is a nullable field?

0 Answers  

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What is comparator in java?

0 Answers  

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what do you mean by classloader?

0 Answers  

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What is difference between equal and == in java?

0 Answers  

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Which class is the superclass of all classes?

0 Answers  

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public class Garbage { int a=0; public void add() { int c=10+20; System.out.println(c); System.out.println(a); } public static void main(String args[]) { Garbage obj=new Garbage(); System.gc(); System.out.println("Garbage Collected"); obj.add(); } } Above is a code in java used for garbage collection. object obj has been created for the class Garbage and system.gc method is called. Then using that object add method is called.System.gc method if called the obj should be garbage collected?

6 Answers  

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