CODEWITHSUNDEEP
java
John Wickerson
John Wickerson

Reputation: 1232

Synonym for Integer type?

I'm writing a Java program that implements some program analysis. As part of this, I want a type for representing "values" in the programs that I'm analysing. Values, for my purposes, are just integers. However, I would rather not use the int/Integer types in my code, because int/Integer are not a very descriptive names. I would rather write Value. I would then like to write

class Value extends Integer {}

and be done. But this doesn't work because Integer is a final class. So my current solution is to give my Value class an int field and then manually implemented all the various standard methods:

class Value {
  int val;
  public String toString() {...}
  public int hashCode() {...}
  public boolean equals(...) {...}
  ...
}

This feels like overkill when I'm really just looking for class that behaves like Integer but has a more descriptive name.

What are my options here?

Upvotes: 0

Views: 376

Answers (1)

OldCurmudgeon
OldCurmudgeon

Reputation: 65811

You can wrap almost anything in a proxy:

class Value<T extends Number> extends Number {

    final T v;

    public Value(T v) {
        this.v = v;
    }

    @Override
    public int intValue() {
        return v.intValue();
    }

    @Override
    public long longValue() {
        return v.longValue();
    }

    @Override
    public float floatValue() {
        return v.floatValue();
    }

    @Override
    public double doubleValue() {
        return v.doubleValue();
    }

    @Override
    public String toString() {
        return v.toString();
    }

    @Override
    public int hashCode() {
        return v.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        return v.equals(obj);
    }

}

Upvotes: 1

Related Questions