What is substring 1 in java?

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What is the syntax and characteristics of a lambda expression? Explain

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which of tha following is not a thread safe class? a) ArrayList b)Vector c)HashTable d)None

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I want to re-reach and use an object once it has been garbage collected. How it's possible?

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Can classes declared using the abstract keyword cab be instantiated?

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Why is a singleton bad?

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interface X{ void m1(); void m2(); } class Child2 extends Object implements X { public void m1(){ System.out.println("Child2 M1"); } public void m2(){ System.out.println("Child2 M2"); } } public class ParentChildInfterfaceDemo { public static void main(String[] args){ X x = new Child2(); X x1 = new Child2(); x.m1(); x.m2(); x.equals(x1); } } Will the above code work? If yes? Can you please explain why the code x.equals(x1) will work as the equals method is called on interface reference vaiable?

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What is an object in java and how is it created?

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What is a java developer salary?

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Which is faster call by value or call by reference?

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What does \ mean in regex?

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Which list is sorted in java?

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