reverse numbers in an array java code example

Example 1: reverse array in java

int length = array.length;
		for(int i=0;i<length/2;i++) {
			int swap = array[i];
			array[i] = array[length-i-1];
			array[length-i-1] = swap;
		}
or
Collections.reverse(Arrays.asList(array));

Example 2: reverse number in java

public class ReverseNumber {
    public static void main(String[] args) {
        int num = 1234, reversed = 0;

        while(num != 0) {
            int digit = num % 10;
            reversed = reversed * 10 + digit;
            num = num / 10;
        }
        System.out.println("Reversed Number: " + reversed);
}}

Example 3: how to reverse a number in java

int rev= 0;
while(num > 9)
{
  rev= rev*10 + num%10;
  num/= 10;
}