Arrays.copyOf 和System.arraycopy

import java.util.Arrays;

public class TestArrays
{
    public static void main(String[] args)
    {
        String a[]={"b","a","c","d"};
        String c[]=new String[a.length+1];
        
       String ac[]=Arrays.copyOf(a, 3);  //复制字符   3为数字   拷贝几个字符
       System.out.println(ac.toString());
       for (String v:ac)
    {
        System.out.println("suzu:"+v);
    }
      System.out.println(Arrays.copyOf(a, 3).length);
      //arraycopy(复制数组,第几元素始复制, 要复制数组,第几元素开始粘贴,共需要复制元素 数);
      System.arraycopy(a, 1, c, 2, 3);
      for(String i:c)
      {
          System.out.println(i);
      }
    }
}

[Ljava.lang.String;@1fb8ee3
suzu:b
suzu:a
suzu:c
3
null
null
a
c
d