CODEWITHSUNDEEP
java
Kid Diamond
Kid Diamond

Reputation: 2301

Use method from another Class in Object from ArrayList

    ListIterator litr = PuntenLijst.listIterator();

    while(litr.hasNext()){
       Object Punt = litr.next();
       Punt.print();
    }

PuntenLijst is an ArrayList that contains object instances from another Class.

Now I have made a method print() that prints out something from that object (of the other class).

With this loop I try to loop through the ArrayList, and then use the print() method from the other class, but it doesn't not seem to be working.

Can anybody help me out?

Upvotes: 0

Views: 148

Answers (5)

taufique
taufique

Reputation: 2751

You need to cast Object type to the type your actual object is.

Upvotes: 0

Rohit Jain
Rohit Jain

Reputation: 213253

   Object Punt = litr.next();
   Punt.print();

You need to cast your Punt to appropriate class, of which you have the ArrayList.

Of course print() is not a method of Object class

Suppose you have ArrayList like this: -

ArrayList<YourClass> PuntenLijst

Change your invocation to: -

Object Punt = litr.next();
((YourClass)Punt).print();

Or: -

   YourClass Punt = litr.next();
   Punt.print();

Upvotes: 3

fvarg00
fvarg00

Reputation: 220

Why dont you just use for:each loop? The casting is taken care by the JVM provided you've defined PuntenLijst with the correct Type.

Upvotes: 0

Colin D
Colin D

Reputation: 5661

Cast Punt to the type that contains the Print() method.

while(litr.hasNext()){
       TYPE_THAT_HAS_PRINT Punt = (TYPE_THAT_HAS_PRINT) litr.next();
       Punt.print();
    }

Upvotes: 2

kosa
kosa

Reputation: 66637

Cast the object you get as response for litr.next() to corresponding type and call method on that type.

Example:

     Punt puntObj =(Punt) litr.next();
       puntObj.print();

Upvotes: 2

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