How to use arrayCopy() in java

Using arrayCopy()

Array copy is a frequently used function, and the JDK provides an efficient API to implement it:

If When an application needs to copy an array, this function should be used instead of implementing it yourself.

Method code:

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

Its usage is to copy the source array src from the index srcPos to the index destPos of the target array dest, and the length of the copy is length.

System.arraycopy() method is a native method, and usually the performance of native methods is better than ordinary methods. For performance reasons only, in software development, call native methods whenever possible.

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