Using variable as array index

[SalParadise]

Hello,
I am having a spot of trouble using a vaiable as the address to an array.

I have an array which holds a number of hours & minutes for a race time. The array represents the days of the week and i want to have the day number (0 monday, 1 tuesday etc) as the index of the address. How would i implement this, so far i have just got the array itself

public class RunWeek {
    
private RunTime RunTimeList[] = new RunTime[5];

public RunWeek(){
    
    this.RunTimeList[0] = null;
    this.RunTimeList[1] = null;
    this.RunTimeList[2] = null;
    this.RunTimeList[3] = null;
    this.RunTimeList[4] = null;
}
    
public void addDay(int dayNo, int hours, int mins){

...

so it will add the hours/minutes to the array index specified by the dayNo

Any help would be greatly appreciated

Sal

[Iron Lion]

Would it not be simpler just to pass minutes to the method as a single variable, instead of hours and minutes? That way, you could just have an array of ints instead of RunTimes.

[SalParadise]

i can add the minutes to the hours and have an array of doubles but it needs to be returning hours

[Iron Lion]

As far as your program's concerned, working with a single variable for minutes is preferable to two. For human readability, to get output in the form of "1 hour and 4 minutes" from an input of 64 minutes, try a method like:

public void minutesToHours(int minutes) {
    System.out.println(minutes/60 + 
    (minutes >= 120 || minutes < 60) ? " hours" : " hour" + //Prints "hour" for 1 hour, or "hours" for 0 or >=2
    " and " + minutes%60 + " minutes");
}

(I'm pretty new myself so that might not be exactly right, and there might be a method to do something similar in one of the standard classes, but hopefully it should help)

[SalParadise]

ahh thankyou thats much easier to handle. Do you know how to use a variable as the index of the array? there is an input of days as a number then this will be the array index but im unsure how to code it.

Many Thanks

[Iron Lion]

Using a modified version of the method you provided:

public void addDay(int dayNo, int mins) {
    runTimeList[dayNo] = mins;
}

[SalParadise]

thats throwing an 'incompatible types' error saying requires classes.runtime found int
:S

[Iron Lion]

It's still expecting a RunTime instead of an int. You'll need to amend the array declaration to:

private int runTimeList[] = new int[5];

[SalParadise]

will that not remove the connection to the runTime class?

[Iron Lion]

What does your RunTime class do? I'm assuming it just acted as a container for your hours and minutes variables, in which case it's no longer needed.