In this post, we will look at how to print random characters from a String in Java.

Logic:

• Generate a random index using the Math.random()
• Convert index to int
• Find the character at that index from the String and print it

Program

Let’s have a look at the program.

// Java program to
// demonstrate how to find
// random character in a String
public class RandomCharacter {

        public static void main(String[] args) {

                String str = "StringToFindCharacter";

                // generate random index
                int index = (int) (Math.random() * (str.length() - 1));

                // get the character at that index
                char ch = str.charAt(index);

                System.out.println("Random Character from " + str + " at index (" + index + ") is " + ch);
        }
}

Output:

Random Character from StringToFindCharacter at index (5) is g