package test;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;

public class Test {
  
  class Thing 
  {
    public ArrayList<Object> x, y;
    
    Thing(ArrayList<Object> x, ArrayList<Object> y) {
      this.x = x;
      this.y = y;
    }
    
    public boolean equals(Object obj) {
      return this.x==((Thing)obj).x && this.y==((Thing)obj).y;
    }
    
    public int hashCode() {
      return 1; // tmp
    }
    
  }
  
  public void test(){
    ArrayList<Object> a1 = new ArrayList<Object>(Arrays.asList(new Integer[]{1}));
    ArrayList<Object> a2 = new ArrayList<Object>(Arrays.asList(new Integer[]{2}));
    Thing r1 = new Thing(a1,a2);
    Thing r2 = new Thing(a1,a2);
    HashMap<Thing, Object> m = new HashMap<Thing, Object>();
    m.put(r1,new String("xx"));
    
    System.out.println(r1.equals(r2));
    System.out.println(m.get(r2));
    System.out.println(m.containsKey(r2));
  }
  
  public static void main( String[] args ) {
    Test t = new Test();
    t.test();
  }
}