Homework SourseMilitary time and Standard time Java One of the assignments
Military time and Standard time, Java
One of the assignments given is to create a program that will essentially test Military time and Standard time. The Guidlines to the problem are as follows:
Each class should be in a separate file. All related classes should be in a package. The main class should not be in the package.
Create a Time class (abstract) that includes the following members:
* hour
* minutes
* seconds
* Include overloaded constructor and accessor/mutator functions
Create a MilTime class derived from Time that includes the following members
* milHours
- stores military time as an integer
- 1:00 PM would be stored as 1300
- 4:30 PM would be stored as 1630
* accessor for MilHour
- override frombase class
- return milHours
* Mutator for milHour
* Overloaded constructor
- accept milHours and seconds
- convert milHours to hours and minutes and store in class variables
* setTime
- same asconstructor
* getStandHr
- return hour instandard format
- call base class accessor
Create a TimeClock class derived from MilTime that includes:
* another milHours and seconds variables
- these hours represent an ending time
- the variables inherited from MilTime represent a starting time
* overloaded constructor
- accept start time and end time
- usebase class constructor to store start time
* accessor and mutator for new class variables
* TimeDifference
- calculate the number of hours betweenstart time and end time
Create a main program that uses a MilTIme object and a TimeClock object
* Test that all class member functions work properly
* Create the objects based on user input
The MilTime and TimeClock classes should validate that the data entered is within the proper ranges
* seconds should be between 0 and 59 (inclusive)
* military time should be between 0 and 2359 (inclusive)
- the last two digits should never be between 60 and 99 (inclusive)
* numbers outside the range should be set to the closest valid number
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I have created a total of 4 .java files so far; main.java, Time.java, MilTime.java, and TimeClock.java
My I decided to work on this problem from top to bottom, starting with Time.java.
/* Time.java */
package demo
abstract public class Time
{
private int hour, minute, second;
// Default constructor.
public Time()
{
hour = 0;
minute = 0;
second = 0;
}
// Overloaded constructor.
public Time(int getHour, int getMinute, int getSecond)
{
hour = getHour;
minute = getMinute;
second = getSecond;
}
// Accessor/Mutator functions.
public int getHour()
{
return hour;
}
public int getMinute()
{
return minute;
}
public int getSecond()
{
return second;
}
public void setHour(int hour)
{
this.hour = hour;
}
public void setMinute(int minute)
{
this.minute = minute;
}
public void setSecond(int second)
{
this.second = second;
}
}
This class I believe I have correct according to the assignment guide. However after this I am completely stuck.
/* MilTime.java */
package demo
public class MilTime extends Time
{
// Private instance variables.
private int milHours;
/**
* Accessor for milHour
* override from base class
* return milHours
* @return
*/
public int getMilHour()
{
return milHours;
}
/**
* Mutator for milHour
* @param milHours
*/
public void setMilHour(int milHours)
{
this.milHours = milHours;
}
/** Overloaded constructor
* Accept milHours and seconds
* convert milHours to hours and minutes and store in class variables
* @param milHours
* @param seconds
*/
public void setTime(int milHours, int seconds)
{
int hours=0, minutes=0;
if (milHours >= 1200) // time is PM
{
hours = ((milHours - 1200) / 100);
}
else
{
hours = (milHours / 100);
}
minutes = (milHours - (hours * 100));
if (hours == 0)
hours = 12;
Time ctime = new Time(){};
ctime.setHour(hours);
ctime.setMinute(minutes);
ctime.setSecond(seconds);
}
// Same as constructor?
public void setTime()
{
Time ctime = new Time(){};
ctime.setHour(milHours);
}
}
I have quickly become lost with how to accomplish certain tasks. mainly how everything is supposed to be properly organized. If I am just going about this the wrong way, please correct me. Thanks.
Solution
PROGRAM CODE:
Time.java
package time;
public class Time {
private int hours;
private int minutes;
private int seconds;
public Time(int hrs, int mins, int secs)
{
hours = hrs;
minutes = mins;
seconds = secs;
}
public Time(int hrs)
{
hours = hrs;
minutes = 0;
seconds = 0;
}
public int getHours() {
return hours;
}
public void setHours(int hours) {
this.hours = hours;
}
public int getMinutes() {
return minutes;
}
public void setMinutes(int minutes) {
this.minutes = minutes;
}
public int getSeconds() {
return seconds;
}
public void setSeconds(int seconds) {
this.seconds = seconds;
}
}
MilTime.java
package time;
public class MilTime extends Time{
private int milHours;
public MilTime(int milHours, int seconds) {
super(0,0,seconds);
this.milHours = milHours;
int hours=0, minutes=0;
if (milHours >= 1200) // time is PM
{
hours = ((milHours - 1200) / 100);
}
else
hours = (milHours / 100);
minutes = (milHours %100);
if (hours == 0)
hours = 12;
setHours(hours);
setMinutes(minutes);
}
public int getMilHours() {
return this.milHours;
}
public void setMilHours(int milHours) {
this.milHours = milHours;
int hours=0, minutes=0;
if (milHours >= 1200) // time is PM
{
hours = ((milHours - 1200) / 100);
}
else
hours = (milHours / 100);
minutes = (milHours - (hours * 100));
if (hours == 0)
hours = 12;
setHours(hours);
setMinutes(minutes);
}
public int getStandHr()
{
return getHours();
}
}
TimeClock.java
package time;
public class TimeClock extends MilTime{
private int milHours;
private int seconds;
public TimeClock(int startMilHours, int startSeconds, int endMiltime, int endSecondsTime) {
super(startMilHours, startSeconds);
this.milHours = endMiltime;
this.seconds = endSecondsTime;
}
public int getEndMilHours() {
return milHours;
}
public void setEndMilHours(int milHours) {
this.milHours = milHours;
}
public int getEndSeconds() {
return seconds;
}
public void setEndSeconds(int seconds) {
this.seconds = seconds;
}
public int getStartMilHours() {
return getMilHours();
}
public void setStartMilHours(int milHours) {
super.setMilHours(milHours);
}
public int getStartSeconds() {
return getSeconds();
}
public void setStartSeconds(int seconds) {
super.setSeconds(seconds);
}
public double timeDifference()
{
return (getEndMilHours() - getStartMilHours())/100;
}
}
TimeTester.java
import java.util.Scanner;
public class TimeTester {
public static int getHours()
{
int hrs;
Scanner keyboard = new Scanner(System.in);
System.out.print(\"Enter the military hours: \");
hrs = keyboard.nextInt();
if(hrs < 0)
hrs = 0;
else if(hrs > 2359)
hrs = 2359;
return hrs;
}
public static int getSeconds()
{
int sec;
Scanner keyboard = new Scanner(System.in);
System.out.print(\"Enter the seconds: \");
sec = keyboard.nextInt();
if(sec < 0)
sec = 0;
else if(sec > 59)
sec = 59;
return sec;
}
public static void main(String args[])
{
int hrs = -1, sec = -1, smilHours = -1, sseconds = -1, emilHours = -1, eseconds = -1;
MilTime miltime;
TimeClock clock;
hrs = getHours();
sec = getSeconds();
miltime = new MilTime(hrs, sec);
System.out.println(\"Military time: \"+ miltime.getMilHours());
System.out.println(\"Hours: \" + miltime.getStandHr());
System.out.println(\"Minutes: \" + miltime.getMinutes());
System.out.println(\"Seconds: \" + miltime.getSeconds());
System.out.println(\"Enter start time: \");
smilHours = getHours();
sseconds = getSeconds();
System.out.println(\"Enter the end time: \");
emilHours = getHours();
eseconds = getSeconds();
clock = new TimeClock(smilHours, sseconds, emilHours, eseconds);
System.out.println(\"Start Time is \" + clock.getStartMilHours());
System.out.println(\"End Time is \" + clock.getEndMilHours());
System.out.println(\"Time difference: \" + clock.timeDifference());
}
}
OUTPUT:
Enter the military hours: 2345
Enter the seconds: 3
Military time: 2345
Hours: 11
Minutes: 45
Seconds: 3
Enter start time:
Enter the military hours: 1200
Enter the seconds: 20
Enter the end time:
Enter the military hours: 1300
Enter the seconds: 20
Start Time is 1200
End Time is 1300
Time difference: 1.0
