Note on Coherence , Nice Blog Article .

http://horicky.blogspot.in/2010/01/notes-on-oracle-coherence.html

Cheers.,
Kapil

In Java , If two interfaces have same method signature and a class implements both , would it give problem ?

No , it would not give any problem if method is common and same signature it will implement as one within implemented class .
Example : Two interface as below :
Interface 1 :
public interface InterKap {
void show();
void abc();
int show(int k);
}

Interface :2
public interface InterKap2 {
void show();
void xyz();
int show(String k);
}

Implementing Class :
public class TestInerface implements InterKap , InterKap2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub

    }

    @Override
    public void show() {
        // TODO Auto-generated method stub
       
    }

    @Override
    public void xyz() {
        // TODO Auto-generated method stub
       
    }

    @Override
    public void abc() {
        // TODO Auto-generated method stub
       
    }

    @Override
    public int show(String k) {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public int show(int k) {
        // TODO Auto-generated method stub
        return 0;
    }

}

Cheers

Kapil

How many ways we can achieve ordering while adding records in MAP ?

java.util.HashMap is unordered; you can't and shouldn't assume anything beyond that.
    This class makes no guarantees as to the order of the map; in particular, it does not guarantee that the order will remain constant over time.

java.util.LinkedHashMap uses insertion-order.
    This implementation differs from HashMap in that it maintains a doubly-linked list running through all of its entries. This linked list defines the iteration ordering, which is normally the order in which keys were inserted into the map (insertion-order).

java.util.TreeMap, a SortedMap, uses either natural or custom ordering of the keys.
    The map is sorted according to the natural ordering of its keys, or by a Comparator provided at map creation time, depending on which constructor is used.

Cheers

Kapil