You have 3 numbers as user input. WAP in Java to output their values in descending order.

Here is a simple Java program that takes three numbers as input and outputs them in descending order:

import java.util.Scanner;
import java.util.Arrays;
import java.util.Collections;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        Integer[] numbers = new Integer[3];

        System.out.println("Enter 3 numbers:");
        for (int i = 0; i < 3; i++) {
            numbers[i] = scanner.nextInt();
        }

        Arrays.sort(numbers, Collections.reverseOrder());

        System.out.println("Numbers in descending order:");
        for (int i = 0; i < 3; i++) {
            System.out.println(numbers[i]);
        }
    }
}

Here's how this program works:

1. We first import the necessary classes from the Java standard library.
2. We then define a Main class with a main method, which is the entry point of our program.
3. Inside the main method, we create a Scanner object to read user input.
4. We also create an array of Integer objects to store the numbers.
5. We then prompt the user to enter 3 numbers, and we read each number using the nextInt method of our Scanner object, storing them in our array.
6. We then sort the array in descending order using the sort method of the Arrays class, passing Collections.reverseOrder() as the comparator to sort in reverse order.
7. Finally, we print the numbers in descending order.