Well-off accompany you to learn the copy operation of the Java--------array

API provides a lot of methods for program developers to use, the next two will share with you two common array operation methods, today to introduce the first method- the copy operation of the array .

Example: Testjava4_4.java

01//The following procedure describes the copy operation of the array

public class Testjava4_4

03 {

public static void Main (string[] args)

05 {

a1[int] = {1,2,3,4,5}; Declares two integer arrays A1, A2, and initializes them statically

-int a2[] = {9,8,7,6,5,4,3};

System.arraycopy (a1,0,a2,0,3); Operations that perform array copies

System.out.print ("contents of the A1 array:");

Ten for (int i=0;i<a1.length;i++)//output A1 The contents of the array

One System.out.print (a1[i]+ "");

System.out.println ();

13

System.out.print ("contents of the A2 array:");

(int i=0;i<a2.length;i++)//Output a2 the contents of the array

System.out.print (A2[i] + "");

System.out.println ("\ n Array copy complete! ");

18}

19}

Output Result:

A1 the contents of the array: 1 2 3 4 5

A2 the contents of the array: 1 2 3 6 5 4 3

Array copy complete!

System.arraycopy (source,0,dest,0,x): The meaning of the statement is: Copy the source array from the subscript 0 starting from the X element to the target array, from the target array of subscript 0 corresponding to the location to start access.