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Editor to share with you how to use java arrayCopy (), I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Use arrayCopy ()

Array replication is a frequently used feature, and an efficient API is provided in JDK to implement it:

If you need to do array replication in your application, you should use this function instead of implementing it yourself.

Method code:

Public static native void arraycopy (Object src, int srcPos, Object dest, int destPos, int length)

Its use is to copy the source array src from the index srcPos to the index destPos of the target array dest, with a length of length.

The System.arraycopy () method is the native method, and the performance of the native method is generally better than that of the ordinary method. Just for performance reasons, call the native method whenever possible in software development.

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