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Mutator Methods

Mutator Methods

Learn what a mutator method is and how to write one in Java.

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What is a mutator method?

A mutator method is often a void method that changes the values of instance variables or static variables.

A void method does not return a value. Its header contains the void keyword before the method name.

Explanation

Here is an example:

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Person.java
TesterClass.java
public class TesterClass
{
    public static void main(String args[]) 
    {
        Person person = new Person("Mathew");
        person.name = "James";               // ❌ Error: name is private
        System.out.println(person.getName());  
    }
}

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