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java for foreach whileÑ­»·µÄ±È½Ï
¹Ø¼ü×Ö: java
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public static void main(String[] args) {
 
List<Integer> map = new ArrayList<Integer>();
for (int i = 0; i < 100000; i++) {
map.add(i);
}
 
 
long currTime = System.currentTimeMillis();
 
//»ù±¾µÄfor
int z = map.size();
// for (int i = 0; i < z; i++) {
// int tmp = map.get(i);
// System.out.println(tmp);
// }
//foreach
// for (Integer integer : map) {
// int tmp = integer;
// System.out.println(tmp);
// }
//while
// int i = 0 ;
// while(i<z){
// int tmp = map.get(i);
// System.out.println(tmp);
// i++;
// }
//
// long time = System.currentTimeMillis() - currTime ;
// System.out.println(time);
//
// }
ÏÂÃæÊÇ3ÖÖÑ­»·µÃ³öµÄÊý¾Ý(ʱ¼äµ¥Î»ÎªºÁÃë)
      for                   foreach                    while      
µÚÒ»×é±È½Ï(4´Î)
      1313                  1329                       1219
      1266                  1063                       1156
      1078                  1109        


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