「Java入門」Mapインタフェースの実装クラスLinkedHashMap、HashMapのサンプル
Javaコード:
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
public class TestLinkedHashMap {
public static void main(String args[])
{
System.out.println(“*************************LinkedHashMap*************");
Map<Integer,String> map = new LinkedHashMap<Integer,String>();
map.put(6, “apple");
map.put(3, “banana");
map.put(2,"pear");
for (Iterator it = map.keySet().iterator();it.hasNext();)
{
Object key = it.next();
System.out.println( key+"="+ map.get(key));
}
System.out.println(“*************************HashMap*************");
Map<Integer,String> map1 = new HashMap<Integer,String>();
map1.put(6, “apple");
map1.put(3, “banana");
map1.put(2,"pear");
for (Iterator it = map1.keySet().iterator();it.hasNext();)
{
Object key = it.next();
System.out.println( key+"="+ map1.get(key));
}
}
}
実行結果
*************************LinkedHashMap*************
6=apple
3=banana
2=pear
*************************HashMap**************************
2=pear
6=apple
3=banana