TODO java-有疑惑的代码

import java.util.Arrays;
import java.util.function.*;
/**
* Description:
* <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
* <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
* <br/>This program is protected by copyright laws.
* <br/>Program Name:
* <br/>Date:
* @author Yeeku.H.Lee [email protected]
* @version 1.0
*/
public class ArraysTest2
{
public static void main(String[] args)
{
int[] arr1 = new int[]{3, -4 , 25, 16, 30, 18};
// 对数组arr1进行并发排序
Arrays.parallelSort(arr1);
System.out.println(Arrays.toString(arr1));
int[] arr2 = new int[]{3, -4 , 25, 16, 30, 18};
Arrays.parallelPrefix(arr2, new IntBinaryOperator()
{
// left代表数组中前一个所索引处的元素，计算第一个元素时，left为1
// right代表数组中当前索引处的元素
public int applyAsInt(int left, int right)
{
return left * right;
}
});
System.out.println(Arrays.toString(arr2));
int[] arr3 = new int[5];
Arrays.parallelSetAll(arr3 , new IntUnaryOperator()
{
// operand代表正在计算的元素索引
public int applyAsInt(int operand)
{
return operand +1;
}
});
System.out.println(Arrays.toString(arr3));
}
}

　　

chapter4.6