JAVA EE: Java Tutorial : Java String(What is an immutable object)

Friday, 26 February 2016

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Java Tutorial : Java String(What is an immutable object)

Person.java

/*
 * Person is an immutable class. Person's 
 * state cannot be changed once it is created.
 * 
 * We can't subclass the final class and 
 * alter the behavior.
 */
public final class Person
{

    final String name;

    public Person(String name)
    {
        this.name = name;
    }

    public String getName()
    {
        return name;
    }

}

ImmutableTest.java

public class ImmutableTest
{

    public static void main(String[] args)
    {

        Person personObj = new Person("Peter");
        System.out.println(personObj.name);
        System.out.println(personObj.getName());

        //personObj.name = "Dave";

    }

}