Programming Forums > Application Development > Java

kruptof · Nov 28th, 2007, 12:55 PM

I am doing one of my Java assignments and I need to pass a method an int but I am receiving the data as an Object, is it possible to convert an Object to an int.

I will just demonstrate what I mean because I can't post my actual code.

(Toggle Plain Text)

public void A(Object o)
{
      //call B with the given data
      //do something
}
public void B(int i)
{
      //do something
}

titaniumdecoy · Nov 28th, 2007, 1:56 PM

You need to know what the object is an instance of. Assuming it is an Integer, you can call the intValue() method to convert it to an int.

Infinite Recursion · Nov 28th, 2007, 2:14 PM

null_ptr0 · Nov 28th, 2007, 4:26 PM

Object is, haha, an object type, while int is a primitive type. You cannot translate objects to ints through direct casts; but if the object is of Integer, you could access and call the member method intValue() which returns the actual integer value being wrapped.
Example:

(Toggle Plain Text)

public void A(Object o) {
   if(o instanceof Integer)
	B(((Integer) o).intValue());
   else
	throw new IllegalArgumentException();
}

public void B(int i) {
    /*
        code is here
    */
}

Nov 28th, 2007, 1:56 PM	#2
titaniumdecoy Expert Programmer Join Date: Nov 2005 Posts: 856 Rep Power: 3	Re: Object to Int You need to know what the object is an instance of. Assuming it is an Integer, you can call the intValue() method to convert it to an int.

Nov 28th, 2007, 2:14 PM	#3
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	Re: Object to Int test __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Nov 28th, 2007, 4:26 PM	#4
null_ptr0 12 years old Join Date: Nov 2007 Posts: 94 Rep Power: 1	Re: Object to Int Object is, haha, an object type, while int is a primitive type. You cannot translate objects to ints through direct casts; but if the object is of Integer, you could access and call the member method intValue() which returns the actual integer value being wrapped. Example: (Toggle Plain Text) public void A(Object o) { if(o instanceof Integer) B(((Integer) o).intValue()); else throw new IllegalArgumentException(); } public void B(int i) { /* code is here / } public void A(Object o) { if(o instanceof Integer) B(((Integer) o).intValue()); else throw new IllegalArgumentException(); } public void B(int i) { / code is here */ }

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Programming Forums > Application Development > Java

Object to Int