Newly Confuse to Java Programs


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Thread: Newly Confuse to Java Programs

  1. #1
    Join Date
    Nov 2007
    Posts
    1

    Newly Confuse to Java Programs

    A friend gave me this try to figure out, it's taken from a psedue code in which you must go from it.
    The form at the bottom of page.

    Any hlp is apprecieated.

    Code:
    import java.util.Scanner; // program uses class Scanner
    
     
     public class Garage
     {
    	
    			// Instantiate a local variable named input of Scanner class
    			Scanner input = new Scanner( System.in );
    
    			int customerNumber = 1;
    			double totalParkingReceipts =  0.0;
    			double parkingCharge;
    			double hoursParked;
    
    			//String variable hours parked prompt
    			String hoursParkedPrompt = "Enter number of hours parked for customer %2d, or <ctrl>z to stop: ";
    
    			//String variable named programOutput to Summary
    			String programOutput = ("\nSummary of Today's Receipts:\n");
    
    			//Concatenate line 1 of output column
    			String line1 = programOutput += String.format ("\n\t%8s   %6s   %7s","Customer","Hours ","Parking");
    
    			//Concatenate line 2 of output column
    			String line2 = programOutput += String.format ("\n\t%8s   %6s   %7s"," Numbers ","Parked","  Fee  ");
    
    			//Display Headline
    			System.out.println("\nParking Attendant Activity:\n");
    
    			//Display prompt
    			System.out.printf("\t                                   "+hoursParkedPrompt, customerNumber);
    
    			while (input.hasNext());
    			{
    			//Assign input.nextDouble to hoursParked
    			hoursParked = input.nextDouble();
    			
    			
    			//add parkingCharge TO totalParkingReceipts
    	        totalParkingReceipts = parkingCharge;
    
    			//Concatenate formatted String to programOutput
    			String.format(programOutput = "\n\t%8d   %6.1f   $%6.2f", customerNumber, hoursParked, parkingCharge);
    
    	 		//Display prompt
    			System.out.printf("\tCharge for customer %2d is $%6.2f; " + hoursParkedPrompt,
    					   	     customerNumber, parkingCharge, ++customerNumber);
    
    			}// end while
    
    			//Concatenate formatted String to programOutput
    		    String.format(programOutput = "\n\t%-17s   $%6.2f","   Total Receipts",totalParkingReceipts);
    
    			//Display programOutput 
    	        System.out.println programOutput;
    
    			//Calculate charge method of class Garage 
    	        private static Object calculateCharges(double hoursParked) 
    	        {
    
    			//Define named variable constant's
    			final double minimumParkingCharge = 2.0;
    			final double maximumParkingCharge = 10.0;
    			final double maximumParkingHoursForMinimumParkingCharge = 3.0;
    			final double chargePerHourAfterMinimum = 0.5;
    
    			//Assign minimumParkingCharge to parkingCharge
    			double parkingCharge = minimumParkingCharge;
    			
    			if (hoursParked > maximumParkingHoursForMinimumParkingCharge); 
    					parkingCharge = minimumParkingCharge + chargePerHourAfterMinimum +
    					Math.ceil(hoursParked - maximumParkingHoursForMinimumParkingCharge);
    					
    		       // end if
    		       if (parkingCharge > maximumParkingCharge);
    		    	  parkingCharge = maximumParkingCharge;
    		    	
    	              //end if
    
    		      return parkingCharge;
    		   
    		}//end method
    }
    errors I get as follow:

    -Called Compiler C:\PROGRA~1\Java\JDK15~1.0_0\bin\javac.exe-
    -Target File: D:\CSIS12~1\JUMPDR~1\6\Garage.java-
    D:\CSIS12~1\JUMPDR~1\6\Garage.java:28: <identifier> expected
    System.out.println("\nParking Attendant Activity:\n");
    ^
    D:\CSIS12~1\JUMPDR~1\6\Garage.java:31: <identifier> expected
    System.out.printf("\t "+hoursParkedPrompt, customerNumber);
    ^
    D:\CSIS12~1\JUMPDR~1\6\Garage.java:33: illegal start of type
    while (input.hasNext());
    ^
    D:\CSIS12~1\JUMPDR~1\6\Garage.java:33: <identifier> expected
    while (input.hasNext());
    ^
    D:\CSIS12~1\JUMPDR~1\6\Garage.java:52: <identifier> expected
    String.format(programOutput = "\n\t%-17s $%6.2f"," Total Receipts",totalParkingReceipts);
    ^
    5 errors

    -Finished-

    Exhibit A-1: UML Class Diagram of Class Garage
    Garage

    +openForBusiness()
    -calculateCharge(hoursParked : double): double

    Exhibit A-2: Pseudo code for openForBusiness Method of Class Garage
    This public method has no return value, and has no parameters:
    A-2-01) INSTANTIATE a local variable named input of the Scanner class
    A-2-02) Define a local int variable named customerNumber and initialize it to 1
    A-2-03) Define a local double variable named totalParkingReceipts and initialize it to 0.0
    A-2-04) Define a local double variable named parkingCharge
    A-2-05) Define a local double variable named hoursParked
    A-2-06) Define a local String variable named hoursParkedPrompt and initialize it to
    “Enter number of hours parked for customer %2d, or <ctrl>z to stop:Δ “
    A-2-07) Define a local String variable named programOutput and initialize it to “\nSummary of Today’s Receipts:\n”
    A-2-08) CONCATENATE line one of output column headings onto programOutput using method format of the String class:
    programOutput += String.format(“\n\t%8sΔΔΔ%6sΔΔΔ%7s”,”Customer”,”HoursΔ”,”Parking”);
    A-2-09) CONCATENATE line two of output column headings onto programOutput using method format of the String class:
    programOutput += String.format(“\n\t%8sΔΔΔ%6sΔΔΔ%7s”,”ΔNumberΔ”,”Parked”,”ΔΔFeeΔΔ”);
    A-2-10) DISPLAY the task / programmer identification line followed by a blank line
    A-2-11) DISPLAY the “Parking Attendant Activity” heading followed by a blank line
    A-2-12) Using method printf, DISPLAY the following prompt
    (“\tΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔΔ” + hoursParkedPrompt, customerNumber)
    A-2-13) WHILE (input.hasNext())
    A-2-14) ASSIGN input.nextDouble() TO hoursParked
    A-2-15) ASSIGN calculateCharge (hoursParked) TO parkingCharge
    A-2-16) ADD parkingCharge TO totalParkingReceipts
    A-2-17) CONCATENATE the following formatted string onto programOutput:
    (“\n\t%8dΔΔΔ%6.1fΔΔΔ$%6.2f”, customerNumber, hoursParked, parkingCharge)
    A-2-18) Using method printf, DISPLAY the following prompt:
    (“\tCharge for customer %2d is $%6.2f;Δ” + hoursParkedPrompt,
    customerNumber, parkingCharge, ++customerNumber)
    A-2-19) END WHILE
    A-2-20) CONCATENATE the following formatted string onto programOutput:
    (\n\t%-17sΔΔΔ$%6.2f”, “ΔΔΔTotal Receipts”, totalParkingReceipts)
    A-2-21) Using method println, DISPLAY programOutput
    A-2-22) Using method println, DISPLAY a blank line followed by the “End of program” line

    Exhibit A-3: Pseudo code for calculateCharge Method of Class Garage
    This private method has a double return value, and has one parameter: hoursParked of type double:
    A-3-01) Define a named constant for minimumParkingCharge with a value of 2.0;
    A-3-02) Define a named constant for maximumParkingCharge with a value of 10.0;
    A-3-03) Define a named constant for maximumParkingHoursForMinimumParkingCharge with a value of 3.0;
    A-3-04) Define a named constant for chargePerHourAfterMinumum with a value of 0.5;
    A-3-05) Define a local double variable named parkingCharge;
    A-3-06) ASSIGN minimumParkingCharge TO parkingCharge
    A-3-07) IF hoursParked > maximumParkingHoursForMinimumParkingCharge THEN
    A-3-08) ASSIGN the expression ( minimumParkingCharge plus product of chargePerHourAfterMinumum and
    Math.ceil(hoursParked minus maximumParkingHoursForMinimumParkingCharge))
    TO parkingCharge
    A-3-09) END-IF
    A-3-10) IF parkingCharge IS GREATHER THAN maximumParkingCharge THEN
    A-3-11) ASSIGN maximumParkingCharge TO parkingCharge
    A-3-12) END IF
    A-3-13) RETURN parkingCharge

  2. #2
    Join Date
    Mar 2007
    Location
    Bangalore, India
    Posts
    247
    You are writing code outside of a function. That doesn't make sense to the compiler. You should add a main method.

    Code:
    <<imports>>
    
    class Garage
    {
    
    public static void main(String[] args) {
    
    <<Write your code here>>
    
    }
    
    <<Other methods>>
    
    }
    That will solve most of your problems. Again, there are some more errors, but they are easy to solve.

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