java how to write a number backwards code example

Example 1: 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 2: reverse sentence in java

// INPUT: "you shall not pass"
// OUTPUT: "pass not shall you"
  
String s[] = "you shall not pass".split(" "); 
String ans = ""; 
for (int i = s.length - 1; i >= 0; i--) {
  ans += s[i] + " ";
}
System.out.println(ans);