Common Tool Code

This page places some common tool codes or classes that need to be used in the process of algorithm implementation;

InputOutputTools

import cn.hutool.core.util.RandomUtil;
import java.util.Scanner;
/**
 * Email: love1208tt@foxmail.com
 * Copyright (c)  2019. missbe
 * @author lyg   2019/9/21 下午5:01
 * description:公共输入输出类.
 **/
public class InputOutputTools {
    public static int[] instanceArray(int length){
        int[] arr = new int[length];
        for (int i = 0; i < length; i++) {
            arr[i] = RandomUtil.randomInt(1000);
        }
        System.out.println("instance arr:");
        InputOutputTools.outputArray(arr);
        return arr;
    }
    public static void outputArray(int[] arr) {
        System.out.println("start output arr.");
        int i =0;
        for (int value : arr) {
            System.out.print(i + ":" +value + "\t");
            System.out.print(value + "\t");
            i++;
        }
        System.out.println();
        System.out.println("\nend output arr.");
    }
    public static int inputInteger() {
        System.out.println("please input find num:");
        Scanner sc = new Scanner(System.in);
        return sc.nextInt();
    }
}