[java] コレクションをシンプルに宣言する

Generics.java

public class Generics {

	public static void main(String[] args) {
		List<String> oldList = new ArrayList<String>();
		List<String> newlist = newList();
		
		Map<String, String> oldMap = new HashMap<String, String>();
		Map<String, String> newMap = newMap();
	}
	
	private static <E> List<E> newList() {
		return new ArrayList<E>();
	}

	public static <K, V> Map<K, V> newMap() {
		return new HashMap<K, V>();
	}
}