Question

Please help with Java programming!

This code is to implement a Clock class.

Use my beginning code below to test your implementation.

public class Clock {

// Declare your fields here

/**

* The constructor builds a Clock object and sets time to 00:00

* and the alarm to 00:00, also.

*

*/

public Clock() {

setHr(0);

setMin(0);

setAlarmHr(0);

setAlarmMin(0);

}

/**

* setHr() will validate and set the value of the hr field

* for the clock.

*

* @param h the hour to attempt setting

*/

private void setHr( int h ) {

int tmp = 0; // default hour in case h is out of range

if ( h >= 0 && h < 24 ) {

tmp = h; // h is valid, so set it to tmp

}

hr = tmp; // set the hr field to tmp's value

}

/**

* setMin() will validate and set the value of the min field

* for the clock.

*

* @param m the min to attempt setting

*/

private void setMin( int m ) {

}

/**

* setAlarmHr() will validate and set the value of the hr field

* for the alarm.

*

* @param h the hour to attempt setting

*/

/**

* setAlarmMin() will validate and set the value of the min field

* for the alarm.

*

* @param m the min to attempt setting

*/

/**

* getHr() simply returns the value of the hr field.

*

* @return The value of the hour for the clock

*/

private int getHr() {

return hr;

}

/**

* getMin() simply returns the value of the min field.

*

* @return The value of the min for the clock

*/

/**

* getAlarmHr() simply returns the value of the alarmHr field.

*

* @return The value of the hour for the alarm

*/

/**

* getAlarmMin() simply returns the value of the alarmMin field.

*

* @return The value of the min for the alarm

*/

/**

* setAlarm() allows the user of a Clock object to set the alarm

* time.

*

* It should call setAlarmHr() and setAlarmMin() to set the alarm.

*

* @param h an int value for the hour

* @param m an int value for the minute

*/

public void setAlarm( int h, int m ) {

}

/**

* setTime() allows the user of a Clock object to set the current

* time.

*

* It should call setHr() and setMin() to set the time.

*

* @param h an int value for the hour

* @param m an int value for the minute

*/

/**

* alarmSound() will return true if the alarm time has been reached,

* false otherwise.

*

* @return true if the alarm and clock times are equal, false

* otherwise

*/

public boolean alarmSound() {

}

/**

* tick() will increment the current time of the clock, adding

* one minute to the clock's current time, correctly handling if the

* clock advances to the next hour or the next day.

*

* You should use getHr() and getMin() as well as setHr() and

setMin()

* to implement this method.

*/

public void tick() {

}

/**

* toString() will return a String that is the current time

* formatted as HH:MM.

*

* @return A formatted String in HH:MM format.

*/

public String toString() {

return String.format( "%02d:%02d", getHr(), getMin());

}

}

Answer 1

Code in java:

Clock.java file:

public class Clock {

private int hr;

private int min;

private int alarmHr;

private int alarmMin;

Clock(){

setHr(0);

setMin(0);

setAlarmHr(0);

setAlarmMin(0);

}

private void setHr(int h) {

if(h>=0 && h<=23)

this.hr=h;

else

this.hr=0;

}

private void setMin(int m) {

if(m>=0 && m<=59)

this.min=m;

else

this.min=0;

}

private int getHr() {

return this.hr;

}

private int getMin() {

return this.min;

}

private void setAlarmHr(int h) {

if(h>=0 && h<=23)

this.alarmHr=h;

else

this.alarmHr=0;

}

private void setAlarmMin(int m) {

if(m>=0 && m<=59)

this.alarmMin=m;

else

this.alarmMin=0;

}

private int getAlarmHr() {

return this.alarmHr;

}

private int getAlarmMin() {

return this.alarmMin;

}

void setTime(int h,int m) {

this.setHr(h);

this.setMin(m);

}

void setAlarm(int h,int m) {

this.setAlarmHr(h);

this.setAlarmMin(m);

}

boolean alarmSound() {

if(this.getHr()==this.getAlarmHr() && this.getMin()==this.getAlarmMin())

return true;

else

return false;

}

void tick() {

if(this.min+1==60) {

this.hr=this.hr+1;

this.min=0;

if(this.hr>23)

this.hr=0;

}

else

this.min=this.min+1;

}

public String toString() {

return String.format( "%02d:%02d", getHr(), getMin());

}

}

Tester.java file:

import java.util.Scanner;

public class Tester {

public static void main(String[] args) {

// TODO Auto-generated method stub

Clock c=new Clock();

int hr,min,alarmHr,alarmMin;

Scanner sc=new Scanner(System.in);

System.out.print("Enter current time, hours:");

hr=sc.nextInt();

System.out.print("Enter current time, minutes:");

min=sc.nextInt();

c.setTime(hr, min);

System.out.print("Enter alarm time, Hours:");

alarmHr=sc.nextInt();

System.out.print("Enter alarm time, Minutes:");

alarmMin=sc.nextInt();

c.setAlarm(alarmHr,alarmMin);

System.out.print("How many minutes should the clock run for:");

int dur=sc.nextInt();

System.out.println("The time is:"+c.toString());

for(int i=1;i<dur;i++) {

c.tick();

System.out.println("The time is:"+c.toString());

if(c.alarmSound())

System.out.println("The alarm is ringing...");

}

}

}

OUTPUT:

null