Code:
/* 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 * - GREEN: paint a GREEN dot 10* - YELLOW: paint a YELLOW dot 11* - RANDOM: paint a RANDOM dot 12*/ package interpreters; import java.awt.Color; import javax.swing.JOptionPane; import javax.swing.SwingUtilities; import painter.SPainter; import shapes.SCircle; public class Interpreter3 { private void interpreter () { // CREATE OBJECTS TO THINK WITH SPainter miro = new SPainter("Dot Thing",400,400); miro.setWindowLocation(0 ,0); SCircle dot = new SCircle(180); // REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT while ( true ) { String command = JOptionPane.showInputDialog (null,"Command?" ); if (command == null ) { command = "exit"; } // user clicked on Cancel if (command.equalsIgnoreCase( "blue" ) ) { miro.setColor(Color.BLUE); miro.paint(dot); } else if (command.equalsIgnoreCase ("red") ) { miro.setColor(Color.RED); miro.paint(dot); } else if (command.equalsIgnoreCase ( "help" ) ) { JOptionPane.showMessageDialog (null, "Valid commands are: " + "RED | BLUE | GREEN | YELLOW | RANDOM | HELP | EXIT" ); } else if (command.equalsIgnoreCase ( "exit" ) ) { miro.end(); System.out.println( " Thank you for viewing the dots ... " ); break; } else if (command.equalsIgnoreCase ("GREEN") ) { miro.setColor(Color.GREEN); miro.paint(dot); } else if (command.equalsIgnoreCase ("YELLOW") ) { miro.setColor(Color.YELLOW); miro.paint(dot); } else if (command.equalsIgnoreCase("random") ) { miro.setColor (randomColor()); miro.paint(dot); } else { JOptionPane.showMessageDialog(null, "Unrecognizable command: " + command.toUpperCase ()); } } } private static Color randomColor() { int rv = (int)(Math.random()*256); int gv = (int)(Math.random()*256); int bv = (int)(Math.random()*256); return new Color (rv, gv, bv); } // INFRASTRUCTURE FOR SOME SIMPLE PAINTING public Interpreter3() { interpreter(); } public static void main( String [] args ) { SwingUtilities.invokeLater( new Runnable () { public void run() { new Interpreter3(); } }); } }

Output
/usr/lib/jvm/java-1.21.0-openjdk-amd64/bin/java -javaagent:/snap/intellij-idea-community/826/lib/idea_rt.jar=33215 -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath /home/akonysme/IdeaProjects/CS1/out/production/CS1:/home/akonysme/IdeaProjects/CS1/resources/SimplePainter.jar:/home/akonysme/IdeaProjects/CS1/resources/SimpleComposer.jar:/home/akonysme/IdeaProjects/CS1/resources/jfugue-4.0.3-with-musicxml.jar interpreters.Interpreter3 Thank you for viewing the dots ... Process finished with exit code 0

Photo Demo: