What is the difference between static and global variables and also define what are volatile variables?

0 Answers   Flextronics, Hexaware,

---

I have one Shopping cart application, i that i have selected some items, while clicking submit button by mistake i have clicked twice or trice, that time items are selected twice or trice. Actually i want only one copy of items but its selected twice or trice. So how can we avoid this problem?

2 Answers   Honeywell,

---

Java violates few objected oriented concepts. Can you explain in what way?

3 Answers   Ness Technologies,

---

Does java return by reference?

0 Answers  

---

What is Marker interface in java? and what is clone?

16 Answers   Persistent, Wipro,

---

What is a layout manager and what are different types of layout managers available in java awt?

0 Answers  

---

How many bytes is a string?

0 Answers  

---

What does string intern() method do?

0 Answers  

---

What does it mean that strings are immutable?

0 Answers  

---

suppose in a class there is a code like this: { Set hs=new Hashset(); hs.add(new Emp("kathy",1000)); hs.add(new Emp("kathy",2000)); } how can u avoid the above code in your class as set won't allow duplicate objects?

3 Answers  

---

What are the advantages of arraylist over arrays?

0 Answers  

---

What is the maximum size of byte array in java?

0 Answers  

---