To find the first non-repeating number in an array −
import java.util.Arrays; public class NonRpeatingArray { public static void main(String args[]) { int array[] = {114, 225, 669, 996, 336, 6547, 669, 225, 336, 669, 996, 669, 225 }; System.out.println(""); //Creating the count array int countArray[] = new int[array.length]; for(int i=0; i<array.length; i++) { countArray[i] = 0; } for(int i=0; i<array.length; i++) { for(int j=0; j<array.length;j++) { if(i!=j && array[i]==array[j]) { countArray[i]++; } } } System.out.println(Arrays.toString(countArray)); //First non-repeating element in the array for(int i=0; i<array.length; i++) { if(countArray[i]!=0) { System.out.println(array[i]); break; } } } }
[0, 2, 3, 1, 1, 0, 3, 2, 1, 3, 1, 3, 2] 225