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PART B: DATE BOOK A classic computer application is the electronic date book: a list of daily events stored in a calendar. Write a Java program that can be used as a simple date book. The date book will use a separate array for each month of the year, with one array entry for each day in the month (0 = first day of the month, 1 = second day of the month, etc.). The date book is simple because at most one event will be allowed on each day Your program should include an Event class that will be instantiated for each event in the date book. The Event class consists of three instance variables: the starting time of the event (a String), the name of the event (a String), and the priority of the event (an integer value in the range 1-3, with 3 being the highest priority). Make all your instance variables private and write appropriate instance methods for processing them, including a constructor, toString), and any others needed by your program Each month in the date book will be stored as an array of Events. Days with an event will point to the appropriate Event object, and days without will contain nll Your program will produce three types of output (three views) for each month . A calendar view, listing the days of the week (Sunday to Saturday) horizontally across the top, and the days of the month underneath. Next to each day where there is a scheduled event, print an asterisk . Like in a real calendar, the first day of the month can be any of the weekdays the order that they occur during the month. Do not display lines of output for days without events priority .A list of events, showing the day of the month and the details of the event (using toString). These can be displayed in . A list of the highest-priority events (those with priority 3). List only the names of the events, not the starting time or

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Answer #1

Here the two classes "Event.java" and "DateBook.java":

Event.java:

public class Event {

private String StartingTime;

private String Name;

private int Priority;

public String getStartingTime() {

return StartingTime;

}

public void setStartingTime(String startingTime) {

StartingTime = startingTime;

}

public String getName() {

return Name;

}

public void setName(String name) {

Name = name;

}

public int getPriority() {

return Priority;

}

public void setPriority(int priority) {

Priority = priority;

}

}



DateBook.java:

import java.util.ArrayList;

import java.util.Collections;

public class DateBook {

public static void main(String[] args) {

Event[] september = new Event[30];

Event[] october = new Event[31];

int startingDayOfSeptember = (int)(Math.random()*6);

int startingDayOfOctober = (startingDayOfSeptember+30)%7;

showEvents(september, startingDayOfSeptember);

System.out.println("\n\n");

showEvents(october, startingDayOfOctober);

}

public static void showEvents(Event[] month, int startingDay)

{

String[] nameOfEvents = {"Birthday","Anniversary","Marriage","Engagement"};

int temp=0;

//Get the unique dates for events

ArrayList<Integer> list = new ArrayList<Integer>();

for (int i=0; i<month.length; i++) {

list.add(new Integer(i));

}

  

Collections.shuffle(list);

for (int i=0; i<10; i++) {

int eventDate = list.get(i); // event date

month[eventDate]= new Event();

month[eventDate].setName(nameOfEvents[(int)(Math.random()*3)]+" #"+((int)(Math.random()*100)+1));

month[eventDate].setStartingTime(((int)(Math.random()*12)+1)+":00 PM");

month[eventDate].setPriority((int)(Math.random()*3+1));

}

  

//Print Calendar

System.out.println("Sun\tMon\tTue\tWed\tThu\tFri\tSat");

for (int i=0; i<month.length; i++) {

if(i < startingDay)

{

System.out.print("\t");

temp++;

continue;

}else

break;

}

  

int tempBreakLine = temp;

for (int i=0; i<month.length; i++) {

tempBreakLine++;

if(month[i]!=null)

{

System.out.print(i+1+"*\t");

}

else{

System.out.print(i+1+"\t");

}

if(tempBreakLine%7 == 0) {System.out.println();}

}

  

System.out.println("\n");

System.out.println("Events:");

for (int i=0; i<month.length; i++) {

if(month[i]!=null)

{

System.out.print((i+1)+": "+ month[i].getStartingTime()+": "+month[i].getName()+": (priority "+month[i].getPriority()+")");

System.out.println();

}

}

  

System.out.println();

System.out.println("High-priority events:");

for (int i=0; i<month.length; i++) {

if(month[i]!=null && month[i].getPriority() == 3)

{

System.out.print((i+1)+": "+month[i].getName());

System.out.println();

}

}

}

}


OutPut:

Problems@ JavadocDeclaration Console 3 <terminated> DateBook Java Application] CProgram Files Jarel.8.0 1111binljavaw.exe (Oc17 24* 31 18* 25 19 26* 20 27 21* 28 22* 29 23 30* Events: 5: 7:00 PM: Marriage #5: (priority 1) 10: 12:00 PM: Marriage #46:

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