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Count the no. of duplicates in an array

I need to find the no. of duplicates in this array. There is something wong in the loop, can anyone please look at it and point me towards right direction.


public class duplicate {
int temp, true_count;
int ar[] = { 1, 2, 3, 4, 1 };
int count;

public void find() {
for (int i = 0; i < ar.length - 1; i++) {
temp = ar[i];
for (int j = i; j <= ar.length-1 ; j++) {

if (temp == ar[j]) {

count += 1;



public static void main(String args[]) {
duplicate dup = new duplicate();

System.out.println("The No of duplicates is :" + dup.count);


Sep 4 '09 #1
3 15194
13,262 8TB
Are you in the same class with this guy?
Sep 4 '09 #2
hey thanks for the reply. It is my post there. I could not see u there. btw I am trying to do it using hashmap
Sep 4 '09 #3
13,262 8TB
Don't cross post questions all over the forums then.
It's very confusing and annoying for people trying to help.
Sep 4 '09 #4

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