Java Program to find duplicate elements in an array?

[@indiantourism975]

It's useful for me.... Thank you sir

[@indlasubramanyam9510]

Sandeep please cover all the scenarios .then only it will helped

[@shariefrana]

just say "!set.add(e)", the add method on set return false if the element already exists, this will simplify code further.

[@akashnalawade4447]

Try this one if you want to print no. of times of Duplicate element came
public class Repeating {
public static void main(String[] args) {
int arr[] = { 10, 20, 30, 10, 10, 20, 40, 10 };

Integer temp;
HashMap map = new HashMap();
for (int i = 0; i < arr.length; i++) {
temp = (Integer) arr[i];
if (map.get(temp) != null) {
map.put(temp, map.get(temp) + 1);
} else {
map.put(temp, 1);
}
}
for (Entry entry : map.entrySet()) {
{
if (entry.getValue() > 1) {
System.out.print(entry.getKey());
System.out.print("-:");
System.out.print(entry.getValue());
System.out.print("");

}
}
}
}
}

[@tejaswiadepu604]

If we have more than one duplicate, it will print double times.

[@bhargavikasturi2027]

Screen was not clear

[@springhibernatetutes]

Probably issue with your data