return 和编辑多个变量 [JAVA]

Question

我的第一个游戏引擎有问题所以请帮助我:(

有两个部分，第一部分我将解释问题，第二部分我将解释我的问题。

第一部分：

i have an array (named "World") of object class
public Object World[] = new Object[500];
the object have many properties (name,x,y,animation,length,width ....)

i want to make condition of collession for example
if( Function_to_detect_collessions("object1_name","object2_name") ){
object2.Animation = "new value" ;
} 
and with these lines you will understand me :

1- many object can get the same name

2- if more than one collession happened with more than two objects with the same names (object1_name and object2_name) then the modification for the object2.animation will be on all the touched objects
example :
if( collesion("ball","ground") ){
ball.movement = stop;
}
//Now imagine that there is two objects (two Balls) on the ground

第二部分：

i think that you understand me what i mean and now i will explain my question. questions :

1- if i can detect all the collessions how to make the modification on all the objects with one line like
object2.prop = "something"
2- is it possible in java to make modification on an object and with some functions make the same modification on more than one object automatically .

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我抱歉我的英语不好，但我试图用我脑海中的所有词来解释这个问题，我希望我做到了（any答案甚至可以帮助我解决部分问题，所以请帮助)

Answer 1

您可以像这样尝试使用 Java 集合：

public ArrayList<Object> World= new ArrayList<>();

for (int i =0; i<500; i++)
  World.add(new Object(i));

// Update all objects
for (Object myObject : World) myObject.prop = "Something";

编辑：

根据您随后的问题。如果您只需要遍历特定列表，您可以这样做：

public ArrayList<Object> MoversAndShakers = new ArrayList<>();

MoversAndShakers.add(World.get(3));
MoversAndShakers.add(World.get(5));
MoversAndShakers.add(World.get(9));

// Update all MoversAndShakers
for (Object myObject : MoversAndShakers) myObject.prop = "Something";

或者更好的是你可以将它封装在一个函数中以检测碰撞（你可能想看看这个问题如何做到这一点 Simple and fast collision algorithm in java for non-axis aligned boxes）：

public ArrayList<Object> MoversAndShakers = new ArrayList<>();

ArrayList<Object>  getMovingObjects(ArrayList<Object> World)
{
  ArrayList<Object> MoversAndShakers = new ArrayList<>();

  for(Object currentObj : World)
  {
     if (currentObj.velocity > 0)
          MoversAndShakers.add(currentObj);
  }
  return MoversAndShakers;
}

然后上面减少到这个

// Update all moving objects
for (Object myObject : getMovingObjects(World)) 
   myObject.prop = "Something";

return 和编辑多个变量 [JAVA]

return and edit of multiple variables [JAVA]

java

arrays

multiple-value

game-engine

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