What does the exclamation mark mean in java?

0 Answers  

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Explain constructors and types of constructors in java.

0 Answers  

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What is generic type?

0 Answers  

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Difference between hashCode() & equals()?

3 Answers   HCL,

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Name the types of mouse event listeners ?

2 Answers  

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How to call static method?

4 Answers   Epoch,

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Given: 10. interface A { void x(); } 11. class B implements A { public void x() { } public voidy() { } } 12. class C extends B { public void x() {} } And: 20. java.util.List list = new java.util.ArrayList(); 21. list.add(new B()); 22. list.add(new C()); 23. for (A a:list) { 24. a.x(); 25. a.y();; 26. } What is the result? 1 Compilation fails because of an error in line 25. 2 The code runs with no output. 3 An exception is thrown at runtime. 4 Compilation fails because of an error in line 20.

3 Answers  

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What does @override mean?

0 Answers  

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What is the Concept of Encapsulation in OOPS

0 Answers   HCL,

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Can a method be overloaded based on different return type but same argument type?

0 Answers  

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What is the size of int?

0 Answers  

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what is meant by serialization?

7 Answers  

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