Example usage for java.lang Math random

Introduction

In this page you can find the example usage for java.lang Math random.

Prototype

public static double random()

Source Link

Document

Returns a double value with a positive sign, greater than or equal to 0.0 and less than 1.0 .

Usage

From source file:Main.java

/**
 * Returns a random color./*from w  ww  .j  av a2 s  .  co m*/
 */
public static Color getRandColor() {
    return new Color((int) (Math.random() * 255), (int) (Math.random() * 255), (int) (Math.random() * 255));
}

From source file:Main.java

public static int getRandomNumber(int max) {
    if (max <= 0)
        return 0;
    int random = (int) (Math.random() * max + 1);
    return random;
}

From source file:Main.java

public static String generateReplyID() {
    long l = System.currentTimeMillis();
    return "RP" + String.valueOf(l) + String.valueOf((int) (1000.0D + Math.random() * 9000.0D));
}

From source file:Main.java

public static int[] getCheckNum() {
    int[] tempCheckNum = { 0, 0, 0, 0 };
    for (int i = 0; i < 4; i++) {
        tempCheckNum[i] = (int) (Math.random() * 10);
    }// w w  w.  j  a va2  s.c om
    return tempCheckNum;
}

From source file:Main.java

public static String generateReplyID() {
    String str = String.valueOf(System.currentTimeMillis());
    return "RP" + str + String.valueOf((int) (1000.0D + 9000.0D * Math.random()));
}

From source file:Main.java

private static String getVirtualImei() {
    StringBuilder result = new StringBuilder("1234567");
    for (int i = 0; i < 8; i++) {
        result.append((int) (Math.random() * 10));
    }/*from   w ww.jav  a2  s.  c  o  m*/
    return result.toString();
}

From source file:Main.java

public static int[] getLine(int height, int width) {
    int[] tempCheckNum = { 0, 0, 0, 0 };
    for (int i = 0; i < 4; i += 2) {
        tempCheckNum[i] = (int) (Math.random() * width);
        tempCheckNum[i + 1] = (int) (Math.random() * height);
    }//from  ww  w  .jav a 2s  . co  m
    return tempCheckNum;
}

From source file:Main.java

public static int[] getLine(int height, int width) {
    int[] tempCheckNum = { 0, 0, 0, 0, 0 };
    for (int i = 0; i < 4; i += 2) {
        tempCheckNum[i] = (int) (Math.random() * width);
        tempCheckNum[i + 1] = (int) (Math.random() * height);
    }//from w ww .ja  va2  s.co  m
    return tempCheckNum;
}

From source file:Main.java

public static long getRandomLong3() {
    Random rd = new Random();
    long l2 = 0;//from w  ww .  ja va 2 s .co  m
    l2 = (int) (Math.random() * 300);
    return l2;
}

From source file:Main.java

public static int[] getCheckNum(int textlength) {
    int[] tempCheckNum = new int[textlength];
    for (int i = 0; i < textlength; i++) {
        tempCheckNum[i] = (int) (Math.random() * 10);
    }//www .  ja  v  a  2  s. co  m
    return tempCheckNum;
}