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java_rqKDiW.java

import java.util.Arrays;
public class MyClass {

    
    public static int nextGreaterElement(int n) {

        char[] cArr = String.valueOf(n).toCharArray();

        // i is the leftmost digit that should be exchanged
        int i = cArr.length - 1;
        while (i > 0 && cArr[i] <= cArr[i-1]) i--;

        if (i <= 0) return -1;

        // j is the digit that should be exchanged with digit at i
        int j = cArr.length - 1;
        while (j >= i && cArr[j] <= cArr[i-1]) j--;

        // Exchange the digits at location i and j
        char tmp = cArr[j];
        cArr[j] = cArr[i-1];
        cArr[i-1] = tmp;

        // Sort the digits from location i to the end
        Arrays.sort(cArr, i, cArr.length);

        try {
           return Integer.parseInt(String.valueOf(cArr));
        } catch (Exception e) {
            // Intentionally left blank
        }
        return -1;
    }
    
    public static void main(String args[]) {
        int x=10;
        int y=25;
        int z=x+y;

        System.out.println("Sum of x+y = " + nextGreaterElement(19999999));
    }
}