indexing array in static class

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danieljay

indexing array in static class

in Programming Questions • 2 months ago

Hey all,

I am having a bit of an issue with indexing a value into an array. I have incoming values that are changing, and I want to store these in a 2 element array and compare. I seem to be getting a token error that is due to my "small class" for the static variable. code below:

static class ID_CHECK{

public static int[] numbers = new int[2];

public static int i = 0;

// " id" is the incoming/changes value

numbers[i] = hand_id; //hand_id is the value comparing. the values change.

i = i + 1;

if (i == 1) {

int ID1 = numbers[0];

int ID2 = numbers[1];

println(ID1 + "..." + ID2 );

}

Replies(3)

GoToLoop

Re: indexing array in static class

2 months ago

How about this?:

static class ID_Check {
  static final int NUMS = 2;
  static final int[] numbers = new int[NUMS];
  static int i;

  static void addValue(int id) {
    if (i < NUMS)  numbers[i++] = id;

    if (i == NUMS) {
      final int ID1 = numbers[0], ID2 = numbers[1];
      println(ID1 + "..." + ID2 );
    }
  }
}

void setup() {
  ID_Check.addValue( (int) random(100) );
  ID_Check.addValue( (int) random(100) );

  exit();
}

danieljay

Re: Re: indexing array in static class

2 months ago

Hey,

thanks for the code. I am going to incorporate it and let you know. Going to try and understand whats going on as well :)

PhiLho

Re: indexing array in static class

2 months ago

A class can contain only variable declarations and function definitions (mostly). These are called respectively fields and methods in Java.

In your code, you tried to put code directly in the class. It must be wrapped in a method. That's, more or less, what GoToLoop did.

Note that such static class isn't very useful in Processing: it is simpler to just add the functions directly in the sketch, and to declare the variables as global.

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