// FIELD
private ArrayList<Item> owned = new ArrayList<Item>(); // in the Constructor I inizialize this field to null
// GETTER
public ArrayList<Item> getOwned() { return owned; }
// METHOD*
public void addOwned(Item item) {
this.getOwned().add(item); //why this line returns a java.lang.NullPointerException?
}
Refactorings
No refactoring yet !
bob
May 25, 2009, May 25, 2009 20:50, permalink
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"in the Constructor I inizialize this field to null" <- well that's the problem. The constructor runs after the field initializer, so you initialize it to a new object and then set it to null.
okram87.myopenid.com
May 25, 2009, May 25, 2009 22:02, permalink
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thank you!
why this.getOwned().add(item); returns a java.lang.NullPointerException?