Are all final class immutable?

Question

Are all final classes in Java immutable. String and Integer both are final classes and both are immutable i beleive.

Answer 1

A final immutable classes cannot be mutated. Here below it shows a non-final immutable class being mutated:

// a class not intended to be mutated 
public class GoodClass{

   private String name;

   public GoodClass() {
       this.name = "Good Class Neme";
   }

   public String getName() {
       return name;
   }
}

public class BadClass extends GoodClass {

   private String name;

   public String getName() {
       return name;
   }

   // mutating state
   public void setName(String name) {
       this.name = name;
   }
}