Java

Generating Random ASCII Strings

See more PRNG Examples

Demonstrates how to generate random us-ascii strings. Chilkat2 Java

import com.chilkatsoft.chilkat2.Prng;

public class ChilkatExample {

    public static void main(String[] args) {
        boolean success = false;

        // This example assumes the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        success = false;

        Prng fortuna = new Prng();

        // Generate random strings having only lowercase chars (a-z)
        // Disallow digits and uppercase and only allow lowercase
        boolean bDigits = false;
        boolean bUppercase = false;
        boolean bLowercase = true;

        System.out.println("-- only lowercase alpha (a-z)");
        for (int i = 1; i <= 10; i++) {
            // Generate 20-character strings.
            System.out.println(fortuna.randomString(20, bDigits, bLowercase, bUppercase));
        }

        // Allow both lowercase and uppercase alpha chars
        bUppercase = true;
        System.out.println("-- lower and uppercase alpha (a-zA-Z)");
        for (int i = 1; i <= 10; i++) {
            // Generate 20-character strings.
            System.out.println(fortuna.randomString(20, bDigits, bLowercase, bUppercase));
        }

        // Allow digits (0-9)
        bDigits = true;
        System.out.println("-- digits and lower/uppercase alpha (0-9a-zA-Z)");
        for (int i = 1; i <= 10; i++) {
            // Generate 20-character strings.
            System.out.println(fortuna.randomString(20, bDigits, bLowercase, bUppercase));
        }

        // Allow only digits (0-9)
        bUppercase = false;
        bLowercase = false;
        System.out.println("-- only digits (0-9)");
        for (int i = 1; i <= 10; i++) {
            // Generate 20-character strings.
            System.out.println(fortuna.randomString(20, bDigits, bLowercase, bUppercase));
        }
    }
}