Assigning objects to variables in java -

Assigning objects to variables in java -

hi im making game of breakout , im having problem getting ball bounce off paddle or bricks.

heres code create ball bounce off bricks , paddle.

private void checkforhit(){ gobject collider = getelementat( ballx, ballspeed); if(collider == paddle){ ballspeed = -ballspeed; } }

i don't know why not working, small.

update

when set set if(collider.equals(paddle))

i java.lang.nullpointerexception error when run game.

it's because trying utilize == signs on objects. normal syntax when comparing objects codechimp explained:

<objectname>.equals( <otherobject> )

you have create sure objects using (if made them yourself) has equal method utilize , compares right fields values etc. other objects. it's of import part of oop larn how objects work together.

you might wanna take @ keyword: instanceof while @ it.

also if looking compare 2 different field values, both fx integer values in each of 2 classes have. create getter method field values , simple compare specific values.

if ( collider.getspecificvalue() == paddle.getspecificvalue() ) { }

java object breakout