This program compiles fine, but when I try to enter any values I get this error message:

End of the programException in thread "AWT-EventQueue-1"

java.lang.NumberFormatException: For input string: "mi"

at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2043)

at sun.misc.FloatingDecimal.parseDouble(FloatingDecimal.java:110)

at java.lang.Double.parseDouble(Double.java:538)

at TripComputer.actionPerformed(TripComputer.java:128)

at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)

at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)

at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)

at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)

at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)

at java.awt.Component.processMouseEvent(Component.java:6533)

at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)

at java.awt.Component.processEvent(Component.java:6298)

at java.awt.Container.processEvent(Container.java:2236)

at java.awt.Component.dispatchEventImpl(Component.java:4889)

at java.awt.Container.dispatchEventImpl(Container.java:2294)

at java.awt.Component.dispatchEvent(Component.java:4711)

at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)

at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)

at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)

at java.awt.Container.dispatchEventImpl(Container.java:2280)

at java.awt.Component.dispatchEvent(Component.java:4711)

at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)

at java.awt.EventQueue.access$500(EventQueue.java:97)

at java.awt.EventQueue$3.run(EventQueue.java:709)

at java.awt.EventQueue$3.run(EventQueue.java:703)

at java.security.AccessController.doPrivileged(Native Method)

at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)

at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)

at java.awt.EventQueue$4.run(EventQueue.java:731)

at java.awt.EventQueue$4.run(EventQueue.java:729)

at java.security.AccessController.doPrivileged(Native Method)

at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)

at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)

at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)

at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)

at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

Can you please fix the code so that it works properly? There are 3 seperate java files posted below and the assignment is posted under them.

//TripComputer.java

import javax.swing.JButton; import javax.swing.JLabel; import javax.swing.JApplet; import javax.swing.JFrame; import javax.swing.JTextField; import java.awt.Color; import java.awt.Container; import java.awt.FlowLayout; import java.awt.Graphics; import java.awt.event.ActionEvent; import java.awt.event.ActionListener;

public class TripComputer extends JApplet implements ActionListener { //constants and instance variables private double totalTime; private boolean restStopTaken; public static final int CHAR_PER_LINE = 4; private JTextField stop, distance, time, speed; private JButton stopButton, legButton; private JLabel stopLabel, distanceLabel, timeLabel1, timeLabel2, speedLabel;

/** * Displays the applet. */ public void init() { Container contentPane = getContentPane();//obtain a content pane window this.setSize(230,230); contentPane.setBackground(Color.CYAN); contentPane.setLayout(new FlowLayout());

JLabel program = new JLabel("TRIP TIME CALCULATOR"); contentPane.add(program); //add the label to the content pane JLabel line = new JLabel(" "); contentPane.add(line); stopButton = new JButton("ADD STOP");//create a button to add a rest stop stopButton.addActionListener(this);//listen to events from the button contentPane.add(stopButton);//add the stopButton to the content Pane legButton = new JButton("ADD LEG"); legButton.addActionListener(this); contentPane.add(legButton);

stopLabel = new JLabel("STOP TIME "); distanceLabel = new JLabel("DISTANCE"); contentPane.add(stopLabel); contentPane.add(distanceLabel);

stop = new JTextField(" " + 0.0, CHAR_PER_LINE);//create a textbox for the user to enter //the amount of rest time and initialize it to 0.0 contentPane.add(stop);//add the text box to the content pane JLabel space1 = new JLabel(" "); contentPane.add(space1); distance = new JTextField(" mi",CHAR_PER_LINE);//the distance should be in miles contentPane.add(distance);

timeLabel1 = new JLabel("YOUR TRIP TIME "); contentPane.add(timeLabel1); timeLabel2 = new JLabel("SO FAR: "); contentPane.add(timeLabel2); speedLabel = new JLabel("SPEED "); contentPane.add(speedLabel);

time = new JTextField(" hr:min", CHAR_PER_LINE); contentPane.add(time); JLabel space2 = new JLabel(" "); contentPane.add(space2); speed = new JTextField(" mi/h",CHAR_PER_LINE);//the speed should be expressed in miles per hour contentPane.add(speed); }

/** * Precondition: distance and speed are parameters of double values. * Computes the time for a leg of the trip given a distance in miles and speed in miles per hour. * Throws an exception when if either the distance or the speed is negative. */ public void computeLegTime(double distance, double speed) throws NegativeNumberException { if ((distance

totalTime = distance/speed; }

/** * Precondition: time is a double value. * Takes a rest stop for the given amount of time. * Throws an exception if the time is negative. * Throws an exception if the client code attempts to take two rest stops in a row. */ public void takeRestStop(double time) throws NegativeNumberException, TwoRestStopsException { if (restStopTaken == false) { if (time >= 0) { totalTime = totalTime + time; } else throw new NegativeNumberException(); } else if (restStopTaken == true) throw new TwoRestStopsException(); }

/** * Returns the current total time for the trip. */ public double getTripTime() { return totalTime; }

/** * Implements the listener interface. */ public void actionPerformed(ActionEvent e) { //implement the program that might encounter exceptions try { String distanceInput = distance.getText();//retrieve the value from the distance textfield double d = Double.parseDouble(distanceInput);//convert the String input to a double value String speedInput = speed.getText(); double s = Double.parseDouble(speedInput); //computes the trip time when the the legButton fires an event if (e.getActionCommand().equals("ADD LEG")) { restStopTaken = false;//once the client starts a new leg, he is able to take a rest stop again. computeLegTime(d,s);//invoke the computeLegTime method to calculate the trip time double totalTime = getTripTime();//return the current trip time int hour = (int)totalTime; //cast the total trip time from a double to an integer value //this gives the number of hours int minute = (int)((totalTime - hour)*60);//calculates the number of minutes time.setText(" " + hour + ":" + minute);//digital time display }

String stopInput = stop.getText();//the user should enter the rest time using numbers only double r = Double.parseDouble(stopInput); //computes the total time after a rest stop is added and the stopButton fires an event if (e.getActionCommand().equals("ADD STOP")) { takeRestStop(r);//invoke the takeRestStop method to take a rest stop of a specified amount of time restStopTaken = true;//the user cannot attempt two rest stops in a row. double totalTime = getTripTime(); int hour2 = (int)totalTime; int minute2 = (int)((totalTime - hour2)*60); time.setText(" " + hour2 + ":" + minute2); }

}

catch(NegativeNumberException c)//handle the exception for negative value { time.setText(c.getMessage()); //display the message for this exception }

catch(TwoRestStopsException c) //handle the exception for attempted two rest stops { time.setText(c.getMessage()); } finally//this part is executed regardless of the exceptions in the try block { System.out.println("End of the program"); } } }

**************************************************************************************

// NegativeNumberException.java

public class NegativeNumberException extends Exception

{

/**

* Default constructor.

*/

public NegativeNumberException()

{

super("Negative Value!");//call the constructor of the base class Exception

}

/**

* Precondition: message is a String value.

* Constructor to define the exception.

*/

public NegativeNumberException(String message)

{

super(message);

}

}

*********************************************************************************

//TwoRestStopsException.java

public class TwoRestStopsException extends Exception

{

/**

* Default constructor.

*/

public TwoRestStopsException()

{

super("You cannot take two rest stops in a row!");//call the constructor of the base class

}

/**

* Precondition: message is a String value.

* Constructor to define the exception.

*/

public TwoRestStopsException(String message)

{

super(message);

}

}

Write an application or applet that implements a trip-time calculator. Define and use a class TripComputer to compute the time of a trip. TripComputer should have the private attributes totalTime-the total time for the trip restStop Taken a boolean flag that indicates whether a rest stop has been taken at the end of the current leg and the following methods: computeLegTime(distance, speed)-computes the time for a leg of the trip having a given distance in miles and speed in miles per hour. If either the distance or the speed is negative, throws an exception. takeRestStop (time)-takes a rest stop for the given amount of time. If the time is negative, throws an exception. Also throws an exception if the client code attempts to take two rest stops in a row. getTrip Time-returns the current total time for the trip Here is one possible configuration of the labels, buttons, and text fields required by the trip- time calculator: TRIP TifE CALCULATOR ADD LEG ADD STOP STOP TIME DISTANCE yoUR TRIP TIME SPEED 50 FAR