Java: What modifier makes the object readable outside the class, but not writable?

Question

Java: What modifier makes the object readable outside the class, but not writable? And the object can be changed within the class.

Make a private setter and public getter – that other guy Dec 19 '17 at 22:54 — that other guy, Dec 19 '17 at 22:54
@thatotherguy That's not a modifier – Titan Dec 19 '17 at 23:01 — Titan, Dec 19 '17 at 23:01
There's no such modifier. Do what Zamrony suggests. – Dawood ibn Kareem Dec 19 '17 at 23:06 — Dawood ibn Kareem, Dec 19 '17 at 23:06
@DawoodibnKareem Well that's disappointing. – Titan Dec 19 '17 at 23:09 — Titan, Dec 19 '17 at 23:09

score 2 · Answer 1 · answered Dec 19 '17 at 23:02

2

To make public read-only field, you can make field private and a public getter for this field.

public class Example {
       private  int myExample=1;
       public int getMyExample() {
              return myExample;
       }
}

answered Dec 19 '17 at 23:02

Zamrony P. Juhara

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Yes I already know how to do that, I am looking for a _modifier_. – Titan Dec 19 '17 at 23:05
AFAIK, there are only `private`, `protected` and `public` for scope modifiers in Java – Zamrony P. Juhara Dec 19 '17 at 23:08

score 1 · Accepted Answer · answered Dec 19 '17 at 23:13

For a field to be modifiable by its class's methods, it must be non-final. There is no modifier or combination of modifiers that grants read access to such a field without granting write access as well. Access-control modifiers (public, protected, private, or the absence of any of those) control the visibility of a field or method for all purposes at once. They do not discriminate between different types of access.

If you want a modifiable field to be readable but not writable, then the only alternative is to protect it behind a getter method, without providing a corresponding setter, as another answer already describes.

Java: What modifier makes the object readable outside the class, but not writable?

2 Answers2