2つの文字列配列aとbがあり、同じ要素(a、bともに大きい)を探しています.
2829 ワード
import java.util.*;
import java.util.logging.Logger;
public class Main {
private Logger logger = Logger.getLogger("ss");
public static void main(String[] args){
Main m = new Main();
m.getSameElementByList();
m.getSameElementByMap();
}
// : = 2-( 2- 1 = )
public void getSameElementByList() {
Long begin=System.currentTimeMillis();
String[] strArr1 = { "xiaoxin", "niutou", "shanqiu", "luobo"};
String[] strArr2 = { "xiaoxin", "ggg", "shanqiu", "meile", "dddsf", "niutou" };
List<String> coll = Arrays.asList(strArr1);
List<String> coll2 = Arrays.asList(strArr2);
List<String> alter0 = new ArrayList<String>(coll2);
List<String> alter1 = new ArrayList<String>(coll);
List<String> alter2 = new ArrayList<String>(coll2);
alter2.removeAll(alter1);
Iterator<String> it1 = alter2.iterator();
while (it1.hasNext())
logger.info(it1.next());
logger.info("------- -----------");
alter0.removeAll(alter2);
Iterator<String> it2 = alter0.iterator();
while (it2.hasNext())
{
logger.info(it2.next());
}
Long end=System.currentTimeMillis();
logger.info(String.valueOf(end-begin));
}
/**
* A map key, value, B , NULL,
*/
public void getSameElementByMap(){
Long begin=System.currentTimeMillis();
logger.info("------- -----------");
String[] strArr1 = { "xiaoxin", "niutou", "shanqiu", "luobo" };
String[] strArr2 = { "xiaoxin", "ggg", "shanqiu", "meile", "dddsf", "niutou" };
HashMap<String,Object> map=new HashMap<String, Object>();
for (String string1 : strArr1) {
map.put(string1, string1);
}
for (String string2 : strArr2) {
Object j=map.get(string2);
if(j!=null){
logger.info(j.toString());
}
}
Long end=System.currentTimeMillis();
logger.info(String.valueOf(end-begin));
}
}// 。 ,
フォーラムからこの招待状の討論を見て、とても良いです...ここに記録する