Question

Goodday everybody,

So I made a class Temperature, which has a constructor to make the temperature.
Temperature is an arraylist of 2 numbers [coldness, hotness].

    public int hotness;
public int coldness;
public int[] temperature;
public int maxTemperature = 10000;


//Constructor Temperature
public Temperature(int hotness, int coldness) {
    /**
     * A constructor for the Array Temperature
     */
    maxTemperature = getMaxTemperature();
        if(hotness <= maxTemperature && coldness <= maxTemperature)
        temperature[0] = coldness;
        temperature[1] = hotness;
        }

and now I want to go into another class and use that object Temperature to do some calculations. Here is the code for it.

    //Variabels

public int volatility;
private static Temperature temperature;
private static int intrensicExplosivity;

    public static int standardVolatility(){
    if(temperature[0] == 0){
        int standardVolatility = 100 * intrensicExplosivity * (0.10 * temperature[1]);
    }

so now I get the error: The type of the expression must be an array type but it resolved to “Temperature”

any solutions?

I’m quite new to Java, so it’s probably just some synthax errors, but I just can’t find it.

thanks in advance.
David

Answer 1

Instead of

public static int standardVolatility() {
    if(temperature[0] == 0) {

try

public static int standardVolatility() {
    if(tepmerature.temperature[0] == 0) {
       ^^^^^^^^^^^^

Note that the temperature in your second snippet is of type Temperature which itself has an int-array called temperature. To access the temperature-array of the Temperature object, you’ll have to do temperature.temperature.

---

As @Marko Topolnik points out, you may also want to change

public int[] temperature;

to

public int[] temperature = new int[2];

in order to make room for the two temperature values.