Description Scott M Stark 2006-06-10 11:13:36 EDT

The following class compiles and runs under eclipse(Version: 3.1.2 Build id: M20060118-1600), but will not even compile under the sun jdk(1.5.0_05-b05).

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

class X
{  
}
class Z
{
   
}
class Y<T>
{
   public T t;
   public Y(T t)
   {
      this.t = t;
   }
   public String toString()
   {
      StringBuffer tmp = new StringBuffer("Y(");
      tmp.append(System.identityHashCode(this));
      tmp.append("),t=");
      tmp.append(System.identityHashCode(t));
      return tmp.toString();
   }
}
public class TestAddAll
{
   private static ArrayList<Y<X>> y = new ArrayList<Y<X>>();
   public static void setY(Y[] array)
   {
      y.addAll(Arrays.asList(array));
      System.out.println("setY: "+y);
      Y<X> ay = y.get(0);
      System.out.println("Y.t instanceof X: "+(ay.t instanceof X));
   }
   public static void main(String[] args)
   {
      ArrayList<Y<Z>> yz = new ArrayList<Y<Z>>();
      yz.add(new Y<Z>(new Z()));
      Y[] array = {};
      array = yz.toArray(array);
      setY(array);
   }
}


The result when run under eclipse is:
setY: [Y(25358555),t=26399554]
Y.t instanceof X: false

The result when trying to compile under the sun jdk is:
[starksm@banshee9100 tests]$ javac TestAddAll.java
TestAddAll.java:28: cannot find symbol
symbol  : method addAll(java.util.List<Y>)
location: class java.util.ArrayList<Y<X>>
      y.addAll(Arrays.asList(array));
       ^
1 error

This error seems correct as I should not be able to add an array of Y<Z> to a List<Y<X>> as I am able to do under eclipse.