Hi,
when i try to call the following class function "set_world(String w)"
from my main class, i am always getting error "error found". it looks
like the problem is with String array "worlds". but i cannot understand.
   can anyone figure out the problem and explain little bit.

Thanks alot.

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import java.io.*;
import java.lang.*;
import java.util.*;

class operations
{
    private String[] worlds;
    operations(){ }
    public void set_world(String w)
    {
        int count = 0;
        try
        {
        worlds[count] = "ABCD";
        }catch ( Exception ee)
        {System.out.println("error found"); }   
   
    }
   
    public String[] get_world()
    {
        return worlds;   
    }

   
}