SortAlgorithms/src/Main.java at master · Stackneveroverflow/SortAlgorithms · GitHub

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import java.io.FileOutputStream;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.Random;

/**

* Main

* @author Macer

* @version V1.1

* @date 2018/05/05 16:09

public class Main {

public static void main(String[] args) {

Integer[] a = new Integer[10000000];

Random rand = new Random(System.currentTimeMillis());

// 伪随机数填充数组

for (int i = 0; i < a.length; i++) {

a[i] = rand.nextInt(99999999);

}

// 复制多组相同的原始伪随机序列

Integer[][] aa = new Integer[10][a.length];

for (int i = 0; i < aa.length; i++) {

// System.arraycopy方法是native方法，比clone()更高效，Arrays.copyOf调用该方法

// 传入参数（源数组，源数组起始位置，目的数组，目的数组起始位置，复制长度）都是浅拷贝

System.arraycopy(a, 0, aa[i], 0, a.length);

}

try (

PrintWriter sortResult = new PrintWriter(new FileOutputStream("SortResult.txt"));

) {

SortDemo.print(sortResult, aa);

} catch (IOException ioe) {

ioe.printStackTrace();

}