java使用array.copy复制数组

总结：理解理解。重要啊

package com.a;

import java.util.Arrays;

public class FJKDLS {
	public static void main(String[] args) {

		int[] a = { 12, 3, 35, 43 };
		int b[] = new int[a.length];
		System.arraycopy(a, 0, b, 0, a.length);
		for (int i = 0; i < b.length; i++) {
			System.out.println(b[i] + " ");

		}
		System.out.println();

	}

}