are getters and setters necessary?
237984
Getters and setters are used to protect your data, particularly when creating classes. For each instance variable, a getter method returns its value while a setter method sets or updates its value. ... Getters and setters allow control over the values.
1408337
Getters and setters are a part of computed properties. They are close relatives to the property observers didSet and willSet . As you may remember didSet and willSet are there to perform extra tasks when a computed property is about to change or has changed.
984820
SET is the ANSI standard way of assigning values to variables, and SELECT is not. But you can use SELECT to assign values to more than one variable at a time. SET allows you to assign data to only one variable at a time. So that in performance is where SELECT will be a winner.
198372
So we can say that class variables and instance variables are fields while local variables and parameter variables are not. The question is old but another important difference between a variable and a field is that a field gets a default value when it's declared. A variable, on the other hand, must be initialized.
356939
2 Answers. Getter and Setter methods are used for encapsulate the data. it means wrapping the data into single unit. For example create a ListView with 3 TextView who has different-different value.
1057179
Description. In JavaScript, a setter can be used to execute a function whenever a specified property is attempted to be changed. Setters are most often used in conjunction with getters to create a type of pseudo-property. It is not possible to simultaneously have a setter on a property that holds an actual value.
32124
The main difference between List and Set interface in Java is that List allows duplicates while Set doesn't allow duplicates. All implementation of Set honor this contract. While a Map holds two objects per Entry e.g. a key and a value and It may contain duplicate values but keys are always unique.
1030523
A getter method allows you to get the value of a field while an accessor method sets the value of the field. b. A getter method allows you to get the value of a field while an accessor method is not often used in Java. ... A getter method gets the name of the class while an accessor method gets the value of the field.
1433468
Explicitly defining a default constructor is not necessary unless you provide another constructor for the entity. ... Since JPA implementations rely upon the existence of a default constructor it is then necessary to include the default constructor that will be omitted.
433957
In Java, getter and setter are two conventional methods that are used for retrieving and updating value of a variable. So, a setter is a method that updates value of a variable. And a getter is a method that reads value of a variable. Getter and setter are also known as accessor and mutator in Java.
128354
It looked like some kind of weird syntax to me. I learned that through the public access modifier, one field of a class is accessible to any packages, and with getters/setters, I am actually doing the same thing — making the field private while the getter/setter method is public, so it can be accessed by any packages.
1430538
Field is generally a private variable on an instance class. It does not mean there is a getter and a setter. Attribute is a vague term. It can easily be confused with XML or Java Naming API.
14296
In C# any "variable" that has a getter and setter is referred to as a property. A variable has no getters and setters or so that is what the text books say. ... The real things about getters and setters are that they more than likely do more than just set an internal variable.
915052
for-each is syntactic sugar for using iterators (approach 2). You might need to use iterators if you need to modify collection in your loop. First approach will throw exception. The difference is largely syntactic sugar except that an Iterator can remove items from the Collection it is iterating.
1134106
Instance variables hold values that must be referenced by more than one method, constructor or block, or essential parts of an object's state that must be present throughout the class. Instance variables can be declared at the class level before or after use. Access modifiers can be given for instance variables.
980276
Getters and Setters Are Not Evil. Every now and then some OOP purist comes and tells us that getters and setters are evil, because they break encapsulation. And you should never, ever use getters and setters because this is a sign of a bad design and leads to maintainability nightmares.
1319163
No, Constructors can be public , private , protected or default (no access modifier at all). Making something private doesn't mean nobody can access it. It just means that nobody outside the class can access it. So private constructor is useful too.