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                ## 數組的復制: * 定義:從一個數組中復制相關內容到另外一個數組中去 方法:```System.arraycopy(src,srcIndex,des,desIndex,length)``` src:原數組 srcIndex:從原數組哪個位置開始復制 des:目標數組 desIndex:從目標數組哪個位置開始插入 length:復制元素的個數 備注:在復制的時候,復制的元素個數不能超過目標數組的長度 ``` package com.yflad.javase; import java.util.Arrays; public class Demo_Arrays_copy { public static void main(String[] args) { //首先聲明一個原數組 int[] arr1 = {1,2,3,4,5}; //聲明一個目標數組 int[] arr2 = {6,7,8,9,10}; //從arr1中復制2,3,4到arr2 System.arraycopy(arr1, 2, arr2, 2, 3); System.out.println(Arrays.toString(arr2)); } } ```
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