[rhm54]

It should look something like this:

Code:

public class numbert {

	
	public static void main(String[] args) {
		String inData;
		int num ,num2;
		int sum;
		int avg;

		inData = JOptionPane.showInputDialog (null, "Enter an Integer Value.") ;
		num = Integer.parseInt (inData); // convert inData to int

		inData = JOptionPane.showInputDialog (null, "Enter another Integer Value.");
		num2 = Integer.parseInt (inData);
		
		sum=num + num2;
		avg= sum/2;
		System.out.println ("Sum of both numbers:" +sum);
		System.out.println ("The average is:" +avg);

		System.out.println ("Good-bye for now, suckahfish!"); //always executed 

	}

}

The problem was you were trying to intialize sum and avg with the variables num and num2 before you had values there.