Example usage for java.util Random Random

Introduction

In this page you can find the example usage for java.util Random Random.

Prototype

public Random()

Source Link

Document

Creates a new random number generator.

Usage

From source file:Main.java

private static byte[] getIV() {
    String base = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    Random random = new Random();
    StringBuffer sb = new StringBuffer();
    for (int i = 0; i < 16; i++) {
        int number = random.nextInt(base.length());
        sb.append(base.charAt(number));//ww  w.  j ava  2s.co  m
    }
    return sb.toString().getBytes();
}

From source file:Main.java

public static <T> T random(Collection<T> coll) {
    int num = (new Random().nextInt(coll.size()));
    for (T t : coll) {
        if (--num < 0) {
            return t;
        }//  w w w.  ja  v  a2s.c o m
    }

    return null;
}

From source file:Main.java

public static String generateRandomStrs(int strCount) {
    StringBuilder randomStrs = new StringBuilder();
    Random randomGenerator = new Random();
    for (int i = 1; i < strCount; i++) {
        int randomInt = randomGenerator.nextInt(26);
        randomStrs.append((char) (randomInt + 'a'));
    }//from w w  w. ja va 2  s  .  c o m

    return randomStrs.toString();
}

From source file:Main.java

public static int getRandomRoll(int min, int max) {
    Random random = new Random();
    return random.nextInt((max - min) + 1) + min;
}

From source file:Main.java

public static String get_random_relax_message() {
    int idx = new Random().nextInt(rm.length);
    return (rm[idx]);
}

From source file:Main.java

public static int[] randomIntArray(int length) {
    int[] ran = new int[length];
    Random random = new Random();
    for (int n = 0; n < ran.length; n++) {
        ran[n] = random.nextInt(100);/*from   w ww .  j  ava 2  s.co m*/
    }
    return ran;
}

From source file:Main.java

public static String getRandomString(int length) {
    Random random = new Random();
    StringBuffer sb = new StringBuffer();
    for (int i = 0; i < length; i++) {
        int number = random.nextInt(3);
        long result = 0;
        switch (number) {
        case 0:// w w w  . j ava2s .  c o  m
            result = Math.round(Math.random() * 25 + 65);
            sb.append(String.valueOf((char) result));
            break;
        case 1:
            result = Math.round(Math.random() * 25 + 97);
            sb.append(String.valueOf((char) result));
            break;
        case 2:
            sb.append(String.valueOf(new Random().nextInt(10)));
            break;
        }

    }
    return sb.toString();
}

From source file:Main.java

/**
 * @param min/* www  . ja  va2  s . com*/
 * @param max
 * @return
 */
public static String getYZM(final int min, final int max) {
    Random random = new Random();
    int randomnum = 0;
    int tmp = Math.abs(random.nextInt());
    randomnum = tmp % (max - min + 1) + min;
    return randomnum + "";
}

From source file:Main.java

public static final String encodeInterfereWord(String src) {
    String base = "abcdefghijklmnopqrstuvwxyz0123456789";
    Random random = new Random();
    StringBuffer sb = new StringBuffer();
    int len = base.length();
    for (int index = 0, size = src.length(); index < size; index++) {
        sb.append(base.charAt(random.nextInt(len)));
        sb.append(src.charAt(index));// w  w  w . j  av  a 2  s  . c  o  m
    }
    sb.append(base.charAt(random.nextInt(len)));
    return sb.toString();
}

From source file:Main.java

public static int getRandom(int min, int max) {
    if (max == min) {
        min = 0;/*from   www  . j  ava  2 s .c  om*/
        max = 100;
    }
    Random random = new Random();

    return random.nextInt(max) % (max - min + 1) + min;
}