CODEWITHSUNDEEP
javaeclipsejscience
pianoisland
pianoisland

Reputation: 173

Strange Javax.measure.quantity.Length Bound Mismatch

I wrote some code using javax.measure, and when I pulled updated code from our repository, I am getting a Bound Mismatch error whenever I try to use <Length> from javax.measure.

Edit The Exact Error Is:

Bound mismatch: The type Length is not a valid substitute for the bounded parameter <Q extends Quantity> of the type BaseUnit<Q>

I moved the code to a clean workspace and everything was just fine, but for some reason in my main workspace it isn't working.

Any ideas to why this is the case? I'm using eclipse and the code in question is below

import javax.measure.Measure;
import javax.measure.quantity.Length;
import javax.measure.unit.BaseUnit;

public class MyUnit{
    BaseUnit<Length> unitType;
    Measure<Length> unitValue;

    public MyUnit(double value, String abbreviation) {
        this.unitType = new BaseUnit<Length>(abbreviation);
        this.unitValue = Measure.valueOf(value, unitType);
    }

    public double getValue() {
        return (double)this.unitValue.getValue();
    }

    public String getUnit() {
        return this.unitType.getSymbol();
    }
}

Upvotes: 1

Views: 392

Answers (1)

trashgod
trashgod

Reputation: 205885

Measure<V,Q extends Quantity> requires two type parameters:

  • V the type of the result returned by getValue().

  • Q the Quantity of the Unit returned by getUnit().

As the MyUnit constructor specifies double, the declaration should be, for example,

Measure<Double, Length> unitValue;

Upvotes: 1

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