Time.java

//Captain-Price-TF-141


package milTime;

/**
Represents time in hours and minutes using
the customary conventions.
*/

public class Time

{
private int hours;   // Conventional hours

private int minutes;       // Conventional minutes

private boolean afternoon; // Flag for afternoon

/**
   Constructs a cutomary time (12 hours, am or pm)
   from a military time ##:##
   @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
		    	  
		    	 hours = Integer.parseInt(militaryTime.substring(0, 2));
		    	 
		    	 minutes = Integer.parseInt(militaryTime.substring(3, 5));
	
		         // Validate hours and minutes are valid values
		         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 do not need converting
		         else
		         	{
		            System.out.println(this.toString());
		         	}
		      }
	   	}
	}

/**
   The toString method returns a conventional time.
   @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;
	}
}