Thread: small problem to do with 'this.'! help and explanation much appreciated!

So this is my secondary class

public class Tuna{
   private int hour = 2;
   private int minute = 2;
   private int second = 3;
 
   public void setTime(int hour, int minute, int second){
	  this.hour = 4;
	  this.minute = 5;
	  this.second = 6;
 
   }
   	public String toMilitary(){
   		return String.format("%02d:%02d:%02d", hour, minute, second );
   	}
 
   	public String toString(){
   		return String.format("%d:%02d:%02d %s",((hour==0||hour==12)?12:hour%12), minute, second, (hour <12? "AM": "PM"));
   	}
}

and this is my main class

public class Apples{
    public static void main (String args[]){
    	Tuna tunaObject = new Tuna();
    	System.out.println(tunaObject.toMilitary());
    	System.out.println(tunaObject.toString());
    	System.out.println(tunaObject.toMilitary());
    	System.out.println(tunaObject.toString());
 
    }
}

The effect i wanted was (for all the printlns) it would use the numbers in the setTime(method?constructor? im not sure) but it uses the local 'private' variables.

Try calling the setTime() method from your main() method before the println() statements, something like:

tunaObject.setTime( 4, 5, 6 );

Once you see how that works, you may want to change the setTime() method to actually use the parameters passed to it.

thank you