System.arraycopy()实现数组复制

System.arraycopy(Object src, int srcPos, Object dest, int destPos, int length)

 

arraycopy()方法的参数含义如下：

src：源数组

srcPos：从源数组中复制的起始位置

dest：目标数组

destPos：目标数组插入的起始位置

length：从源数据复制的元素个数

 

代码示例：

public class TestArrayCopy
{
	public static void test()
	{
		String[] a = {"a1","a2","a3","a4"};
		String[] b = {"b1","b2","b3","b4","b5","b6"};
		System.arraycopy(a, 0, b, 2, 3);
		for (String s:b)
		{
			System.out.print(s + " ");
		}
	}
	
	public static void main(String[] args)
	{
		TestArrayCopy.test();
	}
}

 

输出结果如下：

b1 b2 a1 a2 a3 b6