1 /* 2 * This interpreter is intended to paint different colored dots in a window. 3 * 4 * The commands that the interpreter can recognize and respond to are: 5 * - BLUE: paint a blue dot 6 * - RED: paint a red dot 7 * - HELP: show a list of the commands in a dialog message box 8 * - EXIT: terminate the program 9 */ 10 11 package interpreters; 12 13 import java.awt.Color; 14 import javax.swing.JOptionPane; 15 import javax.swing.SwingUtilities; 16 import painter.SPainter; 17 import shapes.SCircle; 18 19 public class Interpreter1{ 20 21 private void interpreter() { 22 // CREATE OBJECTS TO THINK WITH 23 SPainter miro = new SPainter("Dot Thing", 400, 400); 24 miro.setScreenLocation(0, 0); 25 SCircle dot = new SCircle(180); 26 27 // REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT 28 while (true) { 29 String command = JOptionPane.showInputDialog(null, "Command?"); 30 if (command == null) { 31 command = "exit"; 32 } // user clicked on Cancel 33 if (command.equalsIgnoreCase("blue")) { 34 miro.setColor(Color.BLUE); 35 miro.paint(dot); 36 } else if (command.equalsIgnoreCase("red")) { 37 miro.setColor(Color.RED); 38 miro.paint(dot); 39 } else if (command.equalsIgnoreCase("help")) { 40 JOptionPane.showMessageDialog(null, "Valid commands are: " 41 + "RED | BLUE | HELP | EXIT "); 42 } else if (command.equalsIgnoreCase("exit")) { 43 miro.end(); 44 System.out.println("Thank you for viewing the dots ..."); 45 break; 46 } else { 47 JOptionPane.showMessageDialog(null, "Unrecognizable command: " 48 + command.toUpperCase()); 49 } 50 } 51 } 52 // INFRASTRUCTURE FOR SOME SIMPLE PAINTING 53 54 public Interpreter1() { 55 interpreter(); 56 } 57 58 public static void main(String[] args) { 59 SwingUtilities.invokeLater(new Runnable() { 60 public void run() { 61 new Interpreter1(); 62 } 63 }); 64 } 65 } 66 67