How to change values of a class instance with methods?

I have a class named Time with attributes Hour, Min and Sec:

class Time {
  private int Hour;
  private int Min;
  private int Sec;
}

a constructor:

public Time(int h, int m, int s){
    Hour = h;
    Min = m;
    Sec = s;
}

and an instance time1 of the Time class:

Time time1 = new Time(12, 34, 52);

I wanted to create a method inside that will sum to the Hour attribute of time1 instance and return me the result in Time type, but when I try this it gives me the "Type mismatch: cannot convert from int to Time" error:

     public Time Add(int hrs){
     return Hour + hrs;
 }

what am I doing wrong here?

>Solution :

You need to instanciate a new Time object

public Time Add(int hrs){
    return new Time(this.Hour + hrs, this.Min, this.Sec);
}

Also java naming convention, is lowerCamelCase for methods and attributs so hour, min, sec and add