java初學2

標籤：

1、數組操作類Arrays與System

public static void arraycopy(Object src, int srcPos, Object dest,int destPos,int length):用於數組src從第srcPos項元素開始的length個元素拷貝到目標數組dest從destPos開始的length個元素 

2、方法的可變參數

int sum(int a,int ... args){}  

3、類似foreach的for迴圈

public static void main(String[] args) {    String[] itcastNames={"bjit","cdit","gzit"};    for (String name : itcastNames) {        System.out.print(name + " ,");    }}

 

java初學2