Question

Given class Round:

public class Round {

    private int roundNumber;
    private Door door1;
    private Door door2;

    public Round(int _roundNumber)
    {
        this.roundNumber = _roundNumber;
    }


    public void setRoundNumber(int _number) 
    {
        this.roundNumber = _number;
        this.door1 = null;
        this.door2 = null;
    }

    public int getRoundNumber()
    {
        return this.roundNumber;
    }
...

and code in Main:

Round[] gameRounds;  

// manipulations on gameRounds , assume that we put some data into array gameRounds 

...
...
Object ret = null;
for (int i = 0; i < gameRounds.length; i++)
{

    Method roundFunction = Round.class.getMethod("getRoundNumber", new Class[] {});
    ret = roundFunction.invoke(gameRounds[i]);
    // need to put something here 
}

I’m trying to retrieve the field roundNumber with reflection , but the return value is Object type , how can I use its value , i.e. how can I convert it to int roundNumber ? I need to write it into a new XML file …

Thanks

Answer 1

The return value will be an Integer. Cast it to an Integer and then let auto-unboxing take care of it.