Question

How can we create an immutable class in Java?

Answer 1

We can create an immutable class by defining a final class having all of its members as final. Consider the following example.

public final class Employee{  

final String pancardNumber;  

  

public Employee(String pancardNumber){  

this.pancardNumber=pancardNumber;  

}  

  

public String getPancardNumber(){  

return pancardNumber;  

}  

  

}