Here is an example of a program in Java that prompts the user for 10 numbers, one at a time, and prints out the decoded message based on the code you provided:
import java.util.Scanner;
public class DecodeMessage {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
// Create a mapping of numbers to letters
char[] letters = {'D', 'W', 'E', 'L', 'H', 'O', 'R'};
int[] numbers = {1, 2, 3, 4, 5, 6, 7};
// Prompt the user for 10 numbers
StringBuilder decodedMessage = new StringBuilder();
for (int i = 0; i < 10; i++) {
System.out.print("Enter a number: ");
int input = scanner.nextInt();
// Check if the input is a valid number
boolean valid = false;
for (int j = 0; j < numbers.length; j++) {
if (input == numbers[j]) {
decodedMessage.append(letters[j]);
valid = true;
break;
}
}
// If the input is not a valid number, prompt the user again
if (!valid) {
System.out.println("Invalid number. Please enter a valid number.");
i--;
}
}
// Print the decoded message
System.out.println("Decoded message: " + decodedMessage.toString());
}
}
This program uses a Scanner to prompt the user for input, a StringBuilder to construct the decoded message, and two arrays letters and numbers to store the mapping of letters and numbers. The program uses a for loop to prompt the user for 10 numbers, and inside the loop, it checks if the input is a valid number (by checking if it exists in the numbers array) and, if it is, it appends the corresponding letter to the decoded message. If the input is not a valid number, the program prints an error message and the loop iterates again, prompting the user for a new number. Finally, it prints the decoded message.
The test input you provided will output "HELHOR"