//TimeTest.java // Class TimeTest to exercise class Time1 import javax.swing.JOptionPane; public class TimeTest { public static void main( String args[] ) { Time1 t = new Time1(); // calls Time1 constructor String output; output = "The initial universal time is: " + t.toUniversalString() + "\nThe initial standard time is: " + t.toString() + "\nImplicit toString() call: " + t; t.setTime( 13, 27, 6 ); // call mutator method to set instance variables of class // since they are private and hence can't be accessed by name from outside the class output += "\n\nUniversal time after setTime is: " + t.toUniversalString() + "\nStandard time after setTime is: " + t.toString(); t.setTime( 99, 99, 99 ); // all invalid values output += "\n\nAfter attempting invalid settings: " + "\nUniversal time: " + t.toUniversalString() + "\nStandard time: " + t.toString(); JOptionPane.showMessageDialog( null, output, "Testing Class Time1", JOptionPane.INFORMATION_MESSAGE ); System.exit( 0 ); } }