Hi Friend,

To make a class immutable we must restrict changing the state of the class object.We can achieve this through a final and private modifier.Therefore,make all fields final and private.Don't provide any methods that modify the object.

for example,

final class ImmutableClass{
private final int count;
public ImmutableClass(int cout){
count = cout;
}
public int getCount(){
return count;
}
}
public class Immutable{
public static void main(String[] args) {
ImmutableClass cl = new ImmutableClass(5);
System.out.println(cl.getCount());
}
}

Thanks

Please see here **Deleted**