Deleting an object in java

Question

I want to delete an object I created   a oval which follows you   but how would I do this    delete follower1    didn t work   EDIT   Okay  I ll give some more context  I m making a small game with a oval you can control  and a oval which follows you  Now I ve got files named  DrawPanel class  this class draws everything on the screen  and handles collisions  sounds  etc  I got an enemy class  which is the oval following the player  I got an entity class  which is the player you can control  And if the player intersects with the follower  I want my player object to get deleted  The way I m doing it       public void checkCollisions        if player getBounds   intersects follower1 getBounds              Follower1Alive   false          player health   player health - 10

User · Answer

Just use a List   create the list public final List lt Object gt  myObjects     instantiate the list myObjects   new ArrayList lt Object gt        add objects to the list Object object   myObject  myObjects add object      remove the object calling this method if you have more than 1 objects still works with 1   object too   private void removeObject    int len   myObjects size    for int i   0 i lt len  i     Objects object   myObjects get i   myObjects remove object

User · Answer

Your C   is showing   There is no delete in java  and all objects are created on the heap  The JVM has a garbage collector that relies on reference counts   Once there are no more references to an object  it becomes available for collection by the garbage collector    myObject   null may not do it  for example   Foo myObject   new Foo       1 reference Foo myOtherObject   myObject     2 references myObject   null     1 reference   All this does is set the reference myObject to null  it does not affect the object myObject once pointed to except to simply decrement the reference count by 1  Since myOtherObject still refers to that object  it is not yet available to be collected

User · Answer

You don t need to delete objects in java  When there is no reference to an object  it will be collected by the garbage collector automatically

User · Answer

Yea  java is Garbage collected  it will delete the memory for you

User · Answer

You should remove the references to it by assigning null or leaving the block where it was declared  After that  it will be automatically deleted by the garbage collector  not immediately  but eventually    Example 1   Object a   new Object    a   null     after this  if there is no reference to the object               it will be deleted by the garbage collector   Example 2   if  something        Object o   new Object          as you leave the block  the reference is deleted       Later on  the garbage collector will delete the object itself    Not something that you are currently looking for  but FYI  you can invoke the garbage collector with the call System gc

User · Answer

If you want help an object go away  set its reference to null   String x    sadfasdfasd      do stuff x   null    Setting reference to null will make it more likely that the object will be garbage collected  as long as there are no other references to the object

User · Answer

You can remove the reference using null   Let s say You have class A   A a   new A    a null    last statement will remove the reference of the object a and that object will be  garbage collected  by JVM  It is one of the easiest ways to do this

[java] Deleting an object in java?

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