How can I find whitespace in a String?

Question

How can I check to see if a String contains a whitespace character, an empty space or \" \". If possible, please provide a Java example.

For example: String

Answer 1

public static void main(String[] args) {
    System.out.println("test word".contains(" "));
}

Answer 2

package com.test;

public class Test {

    public static void main(String[] args) {

        String str = "TestCode ";
        if (str.indexOf(" ") > -1) {
            System.out.println("Yes");
        } else {
            System.out.println("Noo");
        }
    }
}