顺序（线性）查找

很简单值一样传下标

package com.search;

/**
 * @Auther: 大哥的叔
 * @Date: 2019/8/9 16:48
 * @Description:
 */
public class SeqSearch {

    public static void main (String[] args) {

        int[] arr ={1,9,-11,-1,34,89};
        int index = seqsearch(arr,-11);
        if (index==-1){
            System.out.println("没找到");
        }else {
            System.out.println("下标："+index);
        }
    }

    /**
     *
     * @param arr
     * @param value
     * @return
     */
    public static int seqsearch(int[] arr,int value){
        for (int i = 0; i <arr.length ; i++) {
            if (arr[i]==value){
                return i;
            }
        }
        return -1;
    }
}