Answer / Ankit Singh

No, in Java, the main method must be public and static. The JVM starts execution from the main method, and if it's declared as private, the JVM will not be able to access or execute it.

Explain about doubly linked list

1 Answers   Aditi Placement Service,

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How many bytes are there?

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How are variables stored in memory?

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How is treeset implemented in java?

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what is encapsulation in java? Explain

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what is mean by ooad? where we are using? can you tell me any real time example?

1 Answers   Eka Software,

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public class AboutStrings{ public static void main(String args[]){ String s1="hello"; String s2="hel"; String s3="lo"; String s4=s2+s3; //to know the hash codes of s1,s4. System.out.println(s1.hashCode()); System.out.println(s4.hashCode()); // these two s1 and s4 are having same hashcodes. if(s1==s4){ System.out.println("s1 and s4 are same."); }else System.out.println("s1 and s4 are not same."); } } Somebody told me that, == operator compares references of the objects. In the above example even though s1 and s4 are refering to same object(having same hash codes), it is printing s1 and s4 are not same. Can anybody explain in detail why it is behaving like this? Thanks in Advance RavuriVinod

4 Answers   TCS,

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How do you use equal in java?

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Is this valid in java ? Can we instantiate interface in java?

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How do you invoke a method?

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What are loops in java? What are three types of loops?

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What are the drawbacks of reflection?

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