Task #1 Character and String Class Methods1. Copy the files Time. java (code listing 9.1) and TimeDemo. java (code listing 9.2)from the StudentCD or as directed by your instructor.2. In the Time. java file, add conditions to the decision structure which validates thedata. Conditions are needed that willa. Check the length of the stringb. Check the position of the colonc. Check that all other characters are digits3. Add lines that will separate the string into two substrings containing hours andminutes. Convert these substrings to integers and save them into the instancevariables.4. In the TimeDemo class, add a condition to the loop that converts the user

Kindly note that, you're to replace "at" with shift 2 as the text editor can't take the symbol

Explanation:

//TASK1

//Time.java

public class Time

{

/**hours in conventional time*/

private int hours;

/**minutes in conventional time*/

private int minutes;

/**true if afternoon time, false if morning time*/

private boolean afternoon;

/**Constructs a cutomary time (12 hours, am or pm)

from a military time ##:##

"at"param militaryTime time in the military format ##:##*/

public Time(String militaryTime)

{

//Check to make sure something was entered

if (militaryTime == null)

{

System.out.println(

"You must enter a valid miliary time." );

}

//Check to make sure there are 5 characters

else if (militaryTime.length()!=5)

{

System.out.println(militaryTime +

" is not a valid miliary time." );

}

else

{

//Check to make sure the colon is in

//the correct spot

if (militaryTime.charAt(2)!=':')

{

System.out.println(militaryTime +

" is not a valid miliary time." );

}

//Check to make sure all other characters are digits

else if (!Character.isDigit(militaryTime.charAt(0)))

{

System.out.println(militaryTime +

" is not a valid miliary time." );

}

else if (!Character.isDigit(militaryTime.charAt(1)))

{

System.out.println(militaryTime +

" is not a valid miliary time." );

}

else if (!Character.isDigit(militaryTime.charAt(3)))

{

System.out.println(militaryTime +

" is not a valid miliary time." );

}

else if (!Character.isDigit(militaryTime.charAt(4)))

{

System.out.println(militaryTime +

" is not a valid miliary time." );

}

else

{

//SEPARATE THE STRING INTO THE HOURS

//AND THE MINUTES, CONVERTING THEM TO

//INTEGERS AND STORING INTO THE

//INSTANCE VARIABLES

//validate hours and minutes are valid values

hours=Integer.parseInt( militaryTime.substring(0,2));

minutes=Integer.parseInt(militaryTime.substring(3,5));

if(hours > 23)

{

System.out.println(militaryTime +

" is not a valid miliary time." );

}

else if(minutes > 59)

{

System.out.println(militaryTime +

" is not a valid miliary time." );

}

//convert military time to conventional time

//for afternoon times

else if (hours > 12)

{

hours = hours - 12;

afternoon = true;

System.out.println(this.toString());

}

//account for midnight

else if (hours == 0)

{

hours = 12;

System.out.println(this.toString());

}

//account for noon

else if (hours == 12)

{

afternoon = true;

System.out.println(this.toString());

}

//morning times don't need converting

else

{

System.out.println(this.toString());

}

}

}

}

/**toString method returns a conventional time

"at"return a conventional time with am or pm*/

public String toString()

{

String am_pm;

String zero = "";

if (afternoon)

am_pm = "PM";

else

am_pm = "AM";

if (minutes < 10)

zero = "0";

return hours + ":" + zero + minutes + " " + am_pm;

}

}

//TimeDemo.java

import java.util.Scanner;

public class TimeDemo

{

public static void main (String [ ] args)

{

Scanner keyboard = new Scanner(System.in);

char answer = 'Y';

String enteredTime;

String response;

while (Character.toUpperCase(answer)=='Y')

{

System.out.print(

"Enter a miitary time using the ##:## form ");

enteredTime = keyboard.nextLine();

Time now = new Time (enteredTime);

System.out.println(

"Do you want to enter another (Y/N)? ");

response = keyboard.nextLine();

answer = response.charAt(0);

}

}

}

this is true

explanation:

i looked it up