How do I validate string within an array to a method in java

How do I verify the input of the user to match the array in the call method, so that it will return the letter and show it along with validated it as a string?

String[] options1 = { "a", "b", "c" };  
choice = getValidString(sIn, "Please enter 'a', 'b' or 'c': ",
             "Invalid response. Only the letters 'a', 'b' or 'c' are acceptable.",
             options1); // call method
System.out.printf("The letter your entered was: %s\n\n", choice);

public static String getValidString(Scanner sIn, String question,
                                    String warning, String[] choices)
    String input = "";
    boolean valid= false;
    do {
        System.out.println(question);
        input = sIn.nextLine();
        try {
            Arrays.asList(choices).contains(input); // this is where the problem resides.
            valid = true;
        } catch(Exception e) {
        System.out.println(warning); } 
    } while (!valid);
    return input ;
}

Desired output:

Please enter 'a', 'b' or 'c': hypotenuse.
Invalid response. Only the letters 'a', 'b' or 'c' are acceptable.
Please enter 'a', 'b' or 'c': b
The letter your entered was: b

A Java array does not have any method like contains. Convert the array into a List using Arrays.asList and then you can apply contains on the resulting List.

import java.util.Arrays;
import java.util.List;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sIn = new Scanner(System.in);
		String[] options1 = { "a", "b", "c" };
		String choice = getValidString(sIn, "Please enter 'a', 'b' or 'c': ",
				"Invalid response. Only the letters 'a', 'b' or 'c' are acceptable.", options1); // call mehtod
		System.out.printf("The letter your entered was: %s\n\n", choice);
	}

	public static String getValidString(Scanner sIn, String question, String warning, String[] choices) {

		String input = "";
		boolean valid = false;
		List<String> choiceList = Arrays.asList(choices);
		do {
			System.out.println(question);
			input = sIn.nextLine();
			try {
				valid = choiceList.contains(input);
				valid = true;
			} catch (Exception e) {
				System.out.println(warning);
			}
		} while (!valid);
		return input;
	}
}

A sample run:

Please enter 'a', 'b' or 'c': 
b
The letter your entered was: b