ArrayList Iterator behavior has been changed from jdk6 to jdk7.

Create and compile the below 3 class and then run Main.java.
Using JDK6 it prints the element but JDK7 no element is printed.

// DynamicResult.java
public class DynamicResult {
public Object next() {
return Math.random() * ( 1000 - 1 );
}
}


// DynamicArrayList.java
import java.util.ArrayList;

public class DynamicArrayList extends ArrayList{

private int size;
private DynamicResult dynValues;

public DynamicArrayList(DynamicResult result, int size){
this.dynValues = result;
this.size = size;
}
    
@Override
public int size() {
return super.size() + size;
}

@Override
public Object get(int index) {
if(index < size){
return dynValues.next();
} else {
return super.get(index - size);
}
}
}

// Main.java
import java.util.ArrayList;
import java.util.Iterator;

public class Main {
public static void main(String [] args){
System.out.println("This code does not work in JDK7 but works in JDK6");
System.out.println("Print 1 element as size is 1");
ArrayList list = new DynamicArrayList(new DynamicResult(), 1);

Iterator iter = list.iterator();
if(iter !=null && iter.hasNext()){
System.out.println(iter.next());
}
}
}