Answer Posted / qim2010

Using HashSet class we can eliminate duplicates from and
array. Here is a simple example

public class ArrayRemoveDuplicate {
public static void main(String[] args) {
//
// A string array with duplicate values
//
String[] data = {"A", "C", "B", "D", "A", "B", "E",
"D", "B", "C"};
System.out.println("Original array : " +
Arrays.toString(data));

//
// Convert it to list as we need the list object to
create a set object.
// A set is a collection object that cannot have a
duplicate values, so
// by converting the array to a set the duplicate
value will be removed.
//
List<String> list = Arrays.asList(data);
Set<String> set = new HashSet<String>(list);

System.out.print("Remove duplicate result: ");

//
// Create an array to convert the Set back to array.
The Set.toArray()
// method copy the value in the set to the defined
array.
//
String[] result = new String[set.size()];
set.toArray(result);
for (String s : result) {
System.out.print(s + ", ");
}
}
}

When wait(), notify(), notifyall() methods are called does it releases the lock or holds the acquired lock?

1010

---

What is object-oriented paradigm?

1067

---

Why is stringbuffer not immutable?

1082

---

what is the role of xml in core java?? and how we can use it?? can somebody give a sample program with explanation and from where i can read more about xml?????

2271

---

What is a loop java?

1057

---

Explain about join() method?

972

---

Given a singly linked list, how will you print out its contents in the reverse order? Can you do it with consuming any extra space?

994

---

What is the final class modifier?

1041

---

What are the parts of a method?

982

---

What programs use java?

962

---

What is set in java?

1049

---

Can an interface be defined inside a class?

1062

---

What is the difference between ArrayList and Vector? which one is better in Java

1141

---

What is the biggest integer?

1054

---

what is synchronization? : Java thread

1027

---