[Java] We have learned the class Clock, which was designed to implement the time of day...
[Java]
We have learned the class Clock, which was designed to implement the time of day in a program. Certain application in addition to hours, minutes, and seconds might require you to store the time zone. Please do the following:
- Derive the class ExtClock from the class Clock by adding a data member to store the time zone. Add necessary methods and constructors to make the class functional. Also write the definitions of the methods and constructors.
- Write a test program to test your new class.
Clock.Java:
public class Clock
{
private int hr;
private int min;
private int sec;
public Clock()
{
setTime(0, 0, 0);
}
public Clock(int hours, int minutes, int seconds)
{
setTime(hours, minutes, seconds);
}
public void setTime(int hours, int minutes, int seconds)
{
if (0 <= hours && hours < 24)
hr = hours;
else
hr = 0;
if (0 <= minutes && minutes < 60)
min = minutes;
else
min = 0;
if(0 <= seconds && seconds < 60)
sec = seconds;
else
sec = 0;
}
public int getHours()
{
return hr;
}
public int getMinutes()
{
return min;
}
public int getSeconds()
{
return sec;
}
public void printTime()
{
if (hr < 10)
System.out.print("0");
System.out.print(hr + ":");
if (min < 10)
System.out.print("0");
System.out.print(min + ":");
if (sec < 10)
System.out.print("0");
System.out.print(sec);
}
public void incrementSeconds()
{
sec++;
if (sec > 59)
{
sec = 0;
incrementMinutes();
}
}
public void incrementMinutes()
{
min++;
if (min > 59)
{
min = 0;
incrementHours();
}
}
public void incrementHours()
{
hr++;
if(hr > 23)
hr = 0;
}
public boolean equals(Clock otherClock)
{
return (hr == otherClock.hr && min == otherClock.min && sec == otherClock.sec);
}
public void makeCopy(Clock otherClock)
{
hr = otherClock.hr;
min = otherClock.min;
sec = otherClock.sec;
}
public Clock getCopy()
{
Clock temp = new Clock();
temp.hr = hr;
temp.min = min;
temp.sec = sec;
return temp;
}
}
Homework Answers
CODE
class Clock
{
private int hr;
private int min;
private int sec;
public Clock()
{
setTime(0, 0, 0);
}
public Clock(int hours, int minutes, int seconds)
{
setTime(hours, minutes, seconds);
}
public void setTime(int hours, int minutes, int seconds)
{
if (0 <= hours && hours < 24)
hr = hours;
else
hr = 0;
if (0 <= minutes && minutes < 60)
min = minutes;
else
min = 0;
if(0 <= seconds && seconds < 60)
sec = seconds;
else
sec = 0;
}
public int getHours()
{
return hr;
}
public int getMinutes()
{
return min;
}
public int getSeconds()
{
return sec;
}
public void printTime()
{
if (hr < 10)
System.out.print("0");
System.out.print(hr + ":");
if (min < 10)
System.out.print("0");
System.out.print(min + ":");
if (sec < 10)
System.out.print("0");
System.out.print(sec);
}
public void incrementSeconds()
{
sec++;
if (sec > 59)
{
sec = 0;
incrementMinutes();
}
}
public void incrementMinutes()
{
min++;
if (min > 59)
{
min = 0;
incrementHours();
}
}
public void incrementHours()
{
hr++;
if(hr > 23)
hr = 0;
}
public boolean equals(Clock otherClock)
{
return (hr == otherClock.hr && min == otherClock.min && sec == otherClock.sec);
}
public void makeCopy(Clock otherClock)
{
hr = otherClock.hr;
min = otherClock.min;
sec = otherClock.sec;
}
public Clock getCopy()
{
Clock temp = new Clock();
temp.hr = hr;
temp.min = min;
temp.sec = sec;
return temp;
}
}
class ExtClock extends Clock {
private String timeZone;
public ExtClock(int hours, int minutes, int seconds, String timeZone) {
super(hours, minutes, seconds);
this.timeZone = timeZone;
}
/**
* @return the timeZone
*/
public String getTimeZone() {
return timeZone;
}
/**
* @param timeZone the timeZone to set
*/
public void setTimeZone(String timeZone) {
this.timeZone = timeZone;
}
public void printTimeWithZone() {
if (this.getHours() < 10)
System.out.print("0");
System.out.print(this.getHours() + ":");
if (this.getMinutes() < 10)
System.out.print("0");
System.out.print(this.getMinutes() + ":");
if (this.getSeconds() < 10)
System.out.print("0");
System.out.print(this.getSeconds());
System.out.println(" " + timeZone);
}
}
public class Main {
public static void main(String[] args) {
ExtClock clock = new ExtClock(7, 14, 45, "IST");
clock.printTimeWithZone();
}
}
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