Thread: Urgent! - How To Increment Value

Hi Kevin,

Sorry if this seems like a silly question but how would I do that?

Cheers,
Steven

Hi,

I am having real problems being able to do this as I have spent two days on this and have not got anywhere with it.

What I want to do is take the constructor to set the number instance variable of a newly created Runner object to the value of the class variable nextNumber and then increment the value held by nextNumber by 1, so that it will hold the number of the next Runner object to be created.

[code/Java]
public class Runner
{

/* instance variables */

private static int number; // runner's number
private String name; // runner's name
private String ageGroup; // standard, junior or senior
private int time; // runner's marathon time in minutes
public static int nextNumber; // next avaliable number


/**
* Default constructor for objects of class Runner.
*/
public Runner()
{
super();
this.name = "";
this.ageGroup = "standard";
this.time = 0;
this.nextNumber = 1;

this.number = nextNumber;
this.nextNumber = number + 1;

}

/* instance methods */

/**
* Returns the receiver's number.
*/
public int getNumber()
{
return this.number;
}

public static int getNextNumber()

{
return Runner.nextNumber;
}

/**
* Sets the receiver's name.
*/
public void setName(String aName)
{
this.name = aName;
}


/**
* Returns the receiver's name.
*/
public String getName()
{
return this.name;
}


/**
* Sets the receiver's ageGroup.
*/
public void setAgeGroup(String group)
{
this.ageGroup = group;
}

/**
* Returns the receiver's ageGroup.
*/
public String getAgeGroup()
{
return this.ageGroup;
}


/**
* Sets the receiver's time.
*/
public void setTime(int aTime)
{
this.time = aTime;
}


/**
* Returns the receiver's time.
*/
public int getTime()
{
return this.time;
}

}
[/code]

Anybody know how to get it to do this lost is an understatement as the moment!

Thanks.

Since you weren't specific, for the first approach Kevin recommended, review the tutorial Understanding Class Members. For the second, what don't you understand about passing a number to a constructor? Something like:

    // this is a constructor that accepts the parameter value
    public MyClass( int value )
    {
        // assigns MyClass.value to the parameter value
        this.value = value;
 
        // the rest as needed
    }

--- Update ---

Please post your code correctly and don't post duplicate topics.

Duplicate threads merged.