How can we create an immutable class in java?

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is it mandatory to deaclare all variables public static fianl in interfaces?if i declare like in the below program, public interface A { public static final int I=0; int j=0; } in interface A,what is the difference between I,j?

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What access modifiers can be used for variables?

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Why is the type for real numbers called double?

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what is the difference between String s="hello"; and String s=new String("hello");?

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Does java set allow duplicates?

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while creating thread why we extend thread class

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What is the default initialized value of String type variable?

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What is parseint?

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explain the collection in java

1 Answers   WDC,

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What is defined as false sharing in the context of multithreading?

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What is the default value of the local variables?

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