数组的查找，删除 Day07

package com.sxt.arraytest2;
/*
 * 形参列表的作用：1.接受方法调用处传来的实参
 *                2.规定了实参传入数据的类型
 */
import java.util.Arrays;
 
public class TestArrrayDelete {
    public static void main(String[] args) {
        int[] arr = {32,45,76,23,7,13};
        System.out.println("删除前："+Arrays.toString(arr));
        int index = 2;//删除下标为2的元素
        Delete(arr, index);//[32, 45, 23, 7, 13, 0]
        int ele = 45;
        Search(arr,ele);
    }
 
    private static void Search(int[] arr, int ele) {
        int index = -1;//接收下标
        for(int i=0; i<arr.length; i++){
            if(arr[i] == ele){
                index = i;
                break;
            }
        }
        if(index == -1){
            System.out.println("不存在");
        }else{
            System.out.println(ele+"下标："+index);
        }
    }
 
    private static void Delete(int[] arr, int index) {
        for(int i=index; i<arr.length-1; i++){//-1 arr[i+1]否则会越界
            arr[i] = arr[i+1];
        }
        arr[arr.length-1] = 0;
        System.out.println("删除后："+Arrays.toString(arr));
    }
}