RandomTest.java

package lianxi;
import java.util.*;
/**
 * @author Pandy
 * @date 2018/5/12 21:01
 */
public class RandomTest {
    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());
        //生成一个在int整数取值范围内的伪随机整数
        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());
    }
}