In Java can I create a data member which assumes a constant value on a per object basis

Question

I want to create a java class with a data member say id such that each object has its own id but the object id is assigned during object creation and then it can not be modified later.

Is the fact that each object must have a *different* `id` part of the problem? — Ray O'Kalahjan, Aug 16 '16 at 08:03

score 5 · Accepted Answer · answered Aug 16 '16 at 08:02

5

public class Test {
  private final int id;

  public Test(int id) {
    this.id = id;
  }

}

A as final declared variable can only be initialized one time. At definition or at constructor.

answered Aug 16 '16 at 08:02

Rene M.

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I think without setter your id will not be changed as only way to supply it is *constructor* :) – akash Aug 16 '16 at 08:09
1

@TAsk That's the point – SamTebbs33 Aug 16 '16 at 08:15

In Java can I create a data member which assumes a constant value on a per object basis

1 Answers1