Random Number Generation

Here You can find how to generate random number in java.
Step-1:
Create Class RandomString.java

Step-2:
Copy and paste following code to your Class.

Step-3:
Now you can use generate(int length) method to create random string.(i.e. 'int length' parameter is use for random number length)

package com.test;

import static java.lang.Math.round;
import static java.lang.Math.random;
import static java.lang.Math.pow;
import static java.lang.Math.abs;
import static java.lang.Math.min;
import static org.apache.commons.lang.StringUtils.leftPad;

public class RandomString {
  public static String generate(int length) {
    StringBuffer sb = new StringBuffer();
    for (int i = length; i > 0; i -= 12) {
      int n = min(12, abs(i));
      sb.append(leftPad(Long.toString(round(random() * pow(36, n)), 36), n, '0'));
    }
    System.out.println("Random String: "+sb.toString());
    return sb.toString();
  }
}

Categories: J2EE, Java, Random Number