testrandom.java

来自「疯狂Java讲义_源码(含Java设计模式CHM」· Java 代码 · 共 35 行

import java.util.*;
/**
 * Description:
 * <br/>Copyright (C), 2005-2008, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee [e-mail]
 * @version  1.0
 */
public class TestRandom
{
	public static void main(String[] args) 
	{
		Random rand = new Random();
		System.out.println("rand.nextBoolean()：" + rand.nextBoolean());
		byte[] buffer = new byte[16];
		rand.nextBytes(buffer);
		System.out.println(Arrays.toString(buffer));
		//生成0.0~1.0之间的伪随机double数
		System.out.println("rand.nextDouble()：" + rand.nextDouble());
		//生成0.0~1.0之间的伪随机float数
		System.out.println("rand.nextFloat()：" + rand.nextFloat());
		//生成平均值是 0.0，标准差是 1.0的伪高斯数
		System.out.println("rand.nextGaussian()：" + rand.nextGaussian());
		//生成一个处于long整数取值范围的伪随机整数
		System.out.println("rand.nextInt()：" + rand.nextInt());
		//生成0~26之间的伪随机整数
		System.out.println("rand.nextInt(26)：" + rand.nextInt(26));
		//生成一个处于long整数取值范围的伪随机整数
		System.out.println("rand.nextLong()：" +  rand.nextLong());
	}
}