Thread: Problem with adding to a list in a loop

Hi all,

I wrote a code to check if an array is not in a list, then it should add it to another list. I used a linked list for this. But my problem is the program always add multiple copies of the current array and remove what's inside in the list before: My code is as follows:

import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
 
public class Trial {
 
	/**
	 * @param args
	 */
 
	public static void main(String[] args) {
		// TODO Auto-generated method stub
 
		List<int[]> G = new LinkedList<int []>(); 
		List<int []> New = new LinkedList<int []>(); 
 
		int [] f = new int [2];
 
		for(int i=0; i<2; i++){
			for(int j=0; j<2; j++){ 
				f[0] = i;
				f[1] = j;
				//System.out.println("f is "+Arrays.toString(f));
				if(!(G.contains(f))){
					System.out.println("current f is "+Arrays.toString(f));  // I print here in       order to see what is f
					New.add(f);
					System.out.println("content of the list New");
					// I print the list New to see its contents
					for(int k=0; k<New.size(); k++){
						System.out.println(Arrays.toString(New.get(k)));
					}
					System.out.println("finished printing the list New");
				}
			}
		}
 
	}
 
}

And this is the result I got after running:
current f is [0, 0]
content of the list New
[0, 0]
finished printing the list New
current f is [0, 1]
content of the list New
[0, 1]
[0, 1]
finished printing the list New
current f is [1, 0]
content of the list New
[1, 0]
[1, 0]
[1, 0]
finished printing the list New
current f is [1, 1]
content of the list New
[1, 1]
[1, 1]
[1, 1]
[1, 1]
finished printing the list New

Please help!!!!