Collection »ý¼º
CollectionTest.java
import java.util.*;
public class CollectionTest {
public static void main( String [] args ) {
HashSet collection = new HashSet();
String person1 = "È«±æµ¿";
String person2 = "±è»ñ°«";
String person3 = "À̸ù·æ";
collection.add(person1);
collection.add(person2);
collection.add(person3);
System.out.println("Ä÷º¼Ç »ý¼ºÅ©±â:" + collection.size());
System.out.println(person3 + "Àº Ä÷º¼Ç¿¡ Æ÷ÇԵǾî Àִ°¡:" + collection.contains( person3 ));
System.out.println("Ä÷º¼Ç ³»¿ë:");
Iterator iterator = collection.iterator();
while (iterator.hasNext()){
System.out.println(iterator.next());
}
collection.clear();
}
}
D:\java\util\>javac CollectionTest.java
D:\java\util\>java CollectionTest
Ä÷º¼Ç »ý¼ºÅ©±â:3
À̸ù·æÀº Ä÷º¼Ç¿¡ Æ÷ÇԵǾî Àִ°¡:true
Ä÷º¼Ç ³»¿ë:
È«±æµ¿
±è»ñ°«
À̸ù·æ
HashSetÀ» ÀÌ¿ëÇÑ °£´ÜÇÑ Ä÷º¼Ç »ý¼º
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