Immutable Method in Java

Posted by Chris Okyen on Programmers See other posts from Programmers or by Chris Okyen
Published on 2012-11-12T01:14:47Z Indexed on 2012/11/12 11:20 UTC
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Filed under:

java

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immutable

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const

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final

In Java, there is the final keyword in lieu of the const keyword in C and C++.

In the latter languages there are mutable and immutable methods such as stated in the answer by Johannes Schaub - litb to the question How many and which are the uses of “const” in C++?

Use const to tell others methods won't change the logical state of this object.

struct SmartPtr {
    int getCopies() const { return mCopiesMade; }
}ptr1;

...

int var = ptr.getCopies(); // returns mCopiesMade and is specified that to not modify objects state.

How is this performed in Java?

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