制作数组的副本 [英] Make copy of array

问题描述

我有一个数组 a ，它不断被更新。让我们说 a = [1,2,3,4,5] 。我需要制作 a 的完全重复副本，并将其命名为 b 。如果 a 要更改为[6,7,8,9,10]， b 仍应为[1 ，2,3,4,5]。做这个的最好方式是什么？我尝试了一个for循环，如：

I have an array a which is constantly being updated. Lets say a = [1,2,3,4,5]. I need to make an exact duplicate copy of a and call it b. If a were to change to [6,7,8,9,10], b should still be [1,2,3,4,5]. What is the best way to do this? I tried a for loop like:

for(int i=0; i<5; i++){
   b[i]=a[i]
}

但这似乎无法正常工作。请不要使用深层复制等高级术语，因为我不知道这意味着什么。

but that doesn't seem to work correctly. Please don't use advanced terms like deep copy etc because I do not know what that means.

推荐答案

您可以尝试使用< a href =http://docs.oracle.com/javase/7/docs/api/java/lang/System.html#arraycopy%28java.lang.Object,%20int,%20java.lang.Object,%20int ，％20int％29rel =noreferrer> System.arraycopy（）

int[] src  = new int[]{1,2,3,4,5};
int[] dest = new int[5];

System.arraycopy( src, 0, dest, 0, src.length );

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