一、在System类中查看方法的定义

二、示例

1 public class SystemArrayCopyTest { 2  3     /** 4      * @Description: System的arrayCopy方法测试 5      * @param @param args    6      * @return void   7      * @throws 8      * @author liping.sang 9      * @date 2017-6-2110      */11     private  static int COPY_LENTH=3;12     public static void main(String[] args) {13         String [] src = {"Do","More","Think","More"};14         String [] dest= new String[COPY_LENTH];15         System.arraycopy(src, 0, dest, 0, COPY_LENTH);16         for(String s:dest){17             System.out.print(s+" ");18         }19         System.out.println();20         System.out.println("----------------自身拷贝-----------------");21         System.arraycopy(src, 0, src, 1, COPY_LENTH-1);22         for(String s:src){23             System.out.print(s+" ");24         }25     }26 27 }

Do More Think ----------------自身拷贝-----------------Do Do More More