print duplicate number

how can write java program for print this array {1,1,2,5,7,7,8,0,9,9};
Duplicate number????

Answer:int[] numbers = { 1, 5, 23, 2, 1, 6, 3, 1, 8, 12, 3 };
Arrays.sort(numbers);
for(int i = 1; i < numbers.length; i++) {
if(numbers[i] == numbers[i - 1]) {
System.out.println("Duplicate: " + numbers[i]);
}
}