What are the advantages of exception handling?
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What is singleton class in java and how can we make a class singleton?
Is the empty set a singleton?
Which collection allows duplicate values in java?
What is mean by encoding?
What is method in java with example?
Can you use this() and super() both in a constructor?
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.
Why can't we make jsp as a controller and action servlet in struts?
What are the topics in core java?
Is java developer a good career?
What are the legal operands of the instanceof operator?
why an outer class cannot be declared as private?