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 * - YELLOW: paint a yellow dot 8 * - GREEN: paint a green dot 9 * - RANDOM: paint a random colored dot 10 * - HELP: show a list of the commands in a dialog message box 11 * - EXIT: terminate the program 12 */ 13 14 package interpreters; 15 16 import painter.SPainter; 17 import shapes.SCircle; 18 19 import javax.swing.*; 20 import java.awt.*; 21 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("yellow") ) { 43 miro.setColor(Color.YELLOW); 44 miro.paint(dot); 45 } else if ( command.equalsIgnoreCase("green") ) { 46 miro.setColor(Color.GREEN); 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 | YELLOW | GREEN | 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: " + command.toUpperCase()); 60 } 61 } 62 } 63 64 private static Color randomColor() { 65 int rv = (int)(Math.random()*256); 66 int gv = (int)(Math.random()*256); 67 int bv = (int)(Math.random()*256); 68 return new Color(rv,gv,bv); 69 } 70 71 //INFRASTRUCTURE FOR SOME SIMPLE PAINTING 72 73 public Interpreter3() { 74 interpreter(); 75 } 76 77 public static void main(String[] args) { 78 SwingUtilities.invokeLater(new Runnable() { 79 public void run() { 80 new Interpreter3(); 81 } 82 }); 83 } 84 85 } 86