A model solution for homework 1 is presented below. Please make sure you check out either
Sean's Guide to Programming Styleor Cay Horstmann's more general but equally good Style Guide and think about them and follow them. The (minor) difference between the two, I think, is that Cay will not be grading for A202 this semester.
Here's the solution to assignment 1:
-------( HomeoworkOne.java )------- import java.awt.*; import BreezyGUI.*; /* Class HomeworkOne creates a window which converts kilometers to * nautical miles. */ public class HomeworkOne extends GBFrame { // or other class name Label kmLabel = addLabel ("Kilometers" , 1, 1, 1, 1); IntegerField kmIntField = addIntegerField (0 , 1, 2, 1, 1); Label nmLabel = addLabel ("Nautical Miles", 2, 1, 1, 1); DoubleField nmDblField = addDoubleField (0 , 2, 2, 1, 1); Button computeButton = addButton ("Compute" , 3, 1, 2, 1); int kilometers; double nauticalMiles; /* When the computeButton is pressed, update the nauticalMiles field. */ public void buttonClicked(Button buttonObj) { kilometers = kmIntField.getNumber(); nauticalMiles = 0.54 * km; /* 90 * 60 minutes = 90 * 60 nautical miles between the ecuator and north pole (10,000 kilometers) so 1km is about 90 * 60 / 10000 = 0.54, correct? */ nmDblField.setNumber(nauticalMiles); } /* The main() method creates a new HomeworkOne object when this program * is run. */ public static void main(String[] args) { Frame converter = new HomeworkOne(); // this creates the object converter.setSize(200, 150); converter.setVisible(true); } } ----------------------------Problem 14/58: in file HomeworkTwo.java:
-------( HomeworkTwo.java )------- import java.awt.*; import BreezyGUI.*; /* HomeworkTwo creates a frame which asks for data about a student, and * echos this data to a messageBox. */ public class HomeworkTwo extends GBFrame { Label lastNameLabel = addLabel ("Last Name:" , 1, 1, 1, 1); TextField lastNameField = addTextField ("" , 1, 2, 1, 1); Label firstNameLabel = addLabel ("First Name:", 2, 1, 1, 1); TextField firstNameField = addTextField ("" , 2, 2, 1, 1); Label initialLabel = addLabel ("Middle In.:", 3, 1, 1, 1); TextField initialField = addTextField ("" , 3, 2, 1, 1); Label yearLabel = addLabel ("Class Year" , 4, 1, 1, 1); IntegerField yearField = addIntegerField ( 0, 4, 2, 1, 1); Label phoneLabel = addLabel ("Campus Phone:", 5, 1, 1, 1); TextField phoneField = addTextField ("" , 5, 2, 1, 1); Button displayButton = addButton ("Display" , 6, 1, 2, 1); String output; /* When the displayButton is clicked, pop up a messageBox echoing the * personal data that's been entered. */ public void buttonClicked (Button buttonObj) { output = "Last Name: " + lastNameField.getText() + "\nFirstName: " + firstNameField.getText() + "\nMiddle Initial: " + initialField.getText() + "\nClass year: " + yearField.getText() + "\nCampus Phone: " + phoneField.getText() + "\n"; messageBox(output); } /* The main() method creates a new HomeworkTwo object when this program * is run. */ public static void main(String[] args) { Frame personData = new HomeworkTwo(); personData.setSize(200, 150); personData.setVisible(true); } } ----------------------------