ハッシュ(連想配列)
public class hash { public static void main(String[] args) { Hashtable HashPoints=new Hashtable(); String lbl1="p1"; Point pt1=new Point(0,0); HashPoints.put(lbl1,pt1); String lbl2="p2"; Point pt2=new Point(0,0); HashPoints.put(lbl2,pt2); // pt1=(Point)HashPoints.get(lbl1); System.out.println(pt1); // HashPoints.remove(lbl1); pt1=(Point)HashPoints.get(lbl1); System.out.println(pt1); } }