1 2 /* 3 * This interpreter is intended to paint different colored dots in a window 4 * 5 * The commands that the interpreter can recognize and respond to are: 6 * - BLUE: paint a blue dot 7 * - RED: paint a red dot 8 * - GREEN: paint a green dot 9 * - YELLOW: paint a yellow dot 10 * - RANDOM: paint a random color dot 11 * - HELP: show a list of the commands in a dialog message box 12 * - EXIT: terminate the program 13 */ 14 15 package interperpreters; 16 17 import java.awt.Color; 18 import javax.swing.JOptionPane; 19 import javax.swing.SwingUtilities; 20 import painter.SPainter; 21 import shapes.SCircle; 22 23 public class Interpreter3 { 24 25 private void interpreter() { 26 27 // CREATE OBJECTS TO THINK WITH 28 SPainter miro = new SPainter("Dot Thing",400,400); 29 miro.setScreenLocation(0,0); 30 SCircle dot = new SCircle(180); 31 32 // REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT 33 while ( true ) { 34 String command = JOptionPane.showInputDialog(null,"Command?"); 35 if ( command == null ) { command = "exit"; } // user clicked on cancel 36 if ( command.equalsIgnoreCase("blue") ) { 37 miro.setColor(Color.BLUE); 38 miro.paint(dot); 39 } else if ( command.equalsIgnoreCase("red") ) { 40 miro.setColor(Color.RED); 41 miro.paint(dot); 42 } else if ( command.equalsIgnoreCase("green") ) { 43 miro.setColor(Color.GREEN); 44 miro.paint(dot); 45 } else if ( command.equalsIgnoreCase("yellow") ) { 46 miro.setColor(Color.YELLOW); 47 miro.paint(dot); 48 } else if ( command.equalsIgnoreCase("random") ) { 49 miro.setColor(randomColor()); 50 miro.paint(dot); 51 } else if ( command.equalsIgnoreCase("help") ) { 52 JOptionPane.showMessageDialog(null, "Valid commands are: " 53 + "RED | BLUE | GREEN | YELLOW | RANDOM | HELP | EXIT "); 54 } else if ( command.equalsIgnoreCase("exit") ) { 55 miro.end(); 56 System.out.println("Thank you for viewing the dots ... "); 57 break; 58 } else { 59 JOptionPane.showMessageDialog(null, "Unrecognizable command: " 60 + command.toUpperCase()); 61 } 62 63 } 64 65 } 66 67 private static Color randomColor() { 68 int rv = (int)(Math.random()*256); 69 int gv = (int)(Math.random()*256); 70 int bv = (int)(Math.random()*256); 71 return new Color(rv,gv,bv); 72 } 73 74 // INFRASTRUCTURE FOR SOME SIMPLE PAINTING 75 76 public Interpreter3() { 77 interpreter(); 78 } 79 public static void main(String[] args) { 80 SwingUtilities.invokeLater(new Runnable() { 81 public void run() { 82 new Interpreter3(); 83 } 84 }); 85 } 86 } 87