What is static block?

0 Answers  

---

whats the purposr of using serialization?

6 Answers  

---

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  

---

why Interface used?

0 Answers   HCL,

---

Lowest Common ancestor in a Binary Search Tree and Binary Tree.

0 Answers   Amazon,

---

---

Is java platform independent?

0 Answers  

---

What is wrapper class html?

0 Answers  

---

What is classname class in java?

0 Answers  

---

How does the java compiler work?

0 Answers  

---

Which types of exceptions are caught at compile time?

0 Answers  

---

Can a class extend abstract class or interface? why

4 Answers   Wipro,

---

In a container there are 5 components. I want to display the all the components names, how will you do that one?

0 Answers  

---