Immutable Method in Java
In Java, there is the final keyword in lieu of the const keyword in C and C++.
What’s the difference of an object being final and an object being immutable in java?
final String str = “do not change me”; str = “why not?”; //it will result in compile time error saying that final fields can not be re-assigned once created i.e. the reference cannot be changed String str1 = “hello world”; System.out.println(str1.replaceAll(“h”, “q”)); str1 = str1.replaceAll(“h”, “q”); System.out.println(str1); //An immutable object on the other hand means […]
What’s the difference of an object being final and an object being immutable in java?
final String str = “do not change me”; str = “why not?”; //it will result in compile time error saying that final fields can not be re-assigned once created i.e. the reference cannot be changed String str1 = “hello world”; System.out.println(str1.replaceAll(“h”, “q”)); str1 = str1.replaceAll(“h”, “q”); System.out.println(str1); //An immutable object on the other hand means […]
Why to declare a String (as final) and then use it?
In a typical spring mvc validator class, while inserting an errorCode value in the Errors object, what difference does it make between using a String (props.somefield.req) like so
Naming convention: Final fields (not static)
Today I had a discussion with a co-worker about the naming of final fields in Java classes.
When should a class be final? [duplicate]
This question already has answers here: Object oriented immutability: final classes or final methods (4 answers) Closed 9 years ago. I’ve only really seen this on Java’s wrapper classes (String, Integer, etc.), but never in open-source projects, and I was never taught about it in any books or classes. I know it means the class […]
When should a class be final? [duplicate]
This question already has answers here: Object oriented immutability: final classes or final methods (4 answers) Closed 9 years ago. I’ve only really seen this on Java’s wrapper classes (String, Integer, etc.), but never in open-source projects, and I was never taught about it in any books or classes. I know it means the class […]
When should a class be final? [duplicate]
This question already has answers here: Object oriented immutability: final classes or final methods (4 answers) Closed 9 years ago. I’ve only really seen this on Java’s wrapper classes (String, Integer, etc.), but never in open-source projects, and I was never taught about it in any books or classes. I know it means the class […]
When should a class be final? [duplicate]
This question already has answers here: Object oriented immutability: final classes or final methods (4 answers) Closed 9 years ago. I’ve only really seen this on Java’s wrapper classes (String, Integer, etc.), but never in open-source projects, and I was never taught about it in any books or classes. I know it means the class […]
When should a class be final? [duplicate]
This question already has answers here: Object oriented immutability: final classes or final methods (4 answers) Closed 9 years ago. I’ve only really seen this on Java’s wrapper classes (String, Integer, etc.), but never in open-source projects, and I was never taught about it in any books or classes. I know it means the class […]