CODEWITHSUNDEEP
java
hankbb757
hankbb757

Reputation: 3

Alias for an attribute

what is an alias in java? Lets say I have a class with three attributes as shown below and a constructor. how would I Array[] x an alias for the parameter named x, the attribute y an alias for the parameter y, and the attribute z an alias for the parameter z.

public class Apples
  {
    private  Array[] x;
    private String y;
    private String z;






      public Apples(String y, String z, Array[] x)
      {



        }







    }

Upvotes: 0

Views: 932

Answers (1)

Elliott Frisch
Elliott Frisch

Reputation: 201447

x, y and z are variable shadows (or aliases) in the Apples constructor. And you can use this to resolve it. Like

private  Array[] x;     // <-- attribute named x
private String y;       // <-- attribute named y
private String z;       // <-- attribute named z
public Apples(String y, // <-- parameter named y 
        String z,       // <-- parameter named z 
        Array[] x)      // <-- parameter named x
{
    this.y = y; /* assign parameter y to this instance attribute named y */
    this.z = z; /* assign parameter z to this instance attribute named z */
    this.x = x; /* assign parameter x to this instance attribute named x */
}

Alias

If your constructor omitted this like

public Apples(String y, String z, Array[] x) {
    y = y;
    z = z;
    x = x;
}

You would assign the values back to the parameters (essentially a no-op) because they alias the attributes (and the instance fields would be null).

Upvotes: 1

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