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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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