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06.15.2008 at 09:25AM PDT, ID: 23486331
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9.0

Help with programming project

Asked by Hueydude in JavaScript

Tags:

I am writing a project for school and am at an impasse. I can't seem to get the data from my input file into my array. My values seem to be returning the default values only.

The problem is as follows

# Write a class Name that stores a person's first, middle, and last names and provides the following methods:

    * public Name(String first, String middle, String last) -- constructor. The name should be stored in the case given; don't convert to all upper or lower case.
    * public String getFirst() -- returns the first name
    * public String getMiddle() -- returns the middle name
    * public String getLast() -- returns the last name
    * public String firstMiddleLast() -- returns a string containing the person's full name in order, e.g., "Mary Jane Smith".
    * public String lastFirstMiddle() -- returns a string containing the person's full name with the last name first followed by a comma, e.g., "Smith, Mary Jane".
    * public String initials() -- returns the person's initials (a 3-character string). The initials should be all in upper case, regardless of what case the name was entered in. (Hint: Instead of using charAt, use the substring method of String to get a string containing only the first letter -- then you can upcase this one-letter string. See  in the text for a description of the substring method.)

 
# Now write a program TestNames.java that reads in ten names from an input file (you'll need first, middle, and last for each), creates a Name object for each, and uses the methods of the Name class to do the following:

    * displays the person's full name and initials on the screen(a 3-character string). The initials should be all in upper case, regardless of what case the name was entered.  For example:

      Mary Jane Smith MJS
      john donald doe JDD

       
    * writes the last-first-middle version (e.g., "Smith, Mary Jane"  )of each name in the input file to an output file.


I am not too concerned about the writing to a file yet. I can figure that out I think. My biggest problem is trying to find out why my input does not go into the array (or if it is why I can't access it)
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public class Name
   {
      private String first;//First name
      private String middle;//Middle name
      private String last;//Last name
      private String initials;//Three character initials                   
    // ------------------------------------------------------------
   //   Default constructor - to initialize the variables
   // ------------------------------------------------------------
       Name(){
         first = "Tom";
         middle = "Jim";
         last = "Bob";             
         initials = "jjb";
      }
      private String newFirst , newMiddle, newLast ; // Name parts
   
   // ------------------------------------------------------------
   // Another constructor - with three parameters - if you know the first and middle and last name
   // ------------------------------------------------------------
       Name(String first, String middle, String last){
         first = newFirst;
         middle = newMiddle;
         last = newLast;   
      }
   
     
   
   // ------------------------------------------------------------
   //   Accessor methods
   // ------------------------------------------------------------
   
       public String getFirst(){
         return first;
      }
       public String getMiddle(){
         return middle;
      } 
       public String getLast(){
         return last;
      }
         
   
   // ------------------------------------------------------------
   //   Mutator methods
   // ------------------------------------------------------------
       public void setFirst(String newFirst){
         first = newFirst;
      }
       public void setMiddle(String newMiddle){
         middle = newMiddle;
      }
   
       public void setLast(String newLast){
         last = newLast;
      }
       public String firstMiddleLast(){
         return first + " " + middle + " " + last;
      }
   
   
   // ---------------------------------------------------------
   // Return the Initials
   // ---------------------------------------------------------
       public String initials(){
         return first.substring(0,1).toUpperCase()+
            middle.substring(0,1).toUpperCase()+
            last.substring(0,1).toUpperCase();
      
                  
                        
      }
   
   
        
   }// End Class
 
 
import java.util.Arrays;                
 
    public class TestName{
    
    
       
   
     // ---------------------------------------------------------
       public static void main(String[] args) throws Exception {
      // Create a File instance
         java.io.File file = new java.io.File("names.txt");
       
        // Name[]nameArray;
        
       //  nameArray = createNameArray();
         
        //Print Name Array
       //  printNameArray(nameArray);
                 
      // Create a Scanner for the file
         java.util.Scanner input = new java.util.Scanner(file);
      
      // Read data from a file
         while (input.hasNext()) {
            String first = input.next();
            String middle = input.next();
            String last = input.next();
                
            Name[]nameArray;
         
            nameArray = createNameArray();
            printNameArray(nameArray);
          //System.out.println(first + " " + middle + " " + last + " " + "nameArray[i].initials()");
         }
        
      // Close the file
         input.close();
      }
         
        
      public static Name[] createNameArray() {
         Name[]nameArray = new Name[10];//create an object
         int j = 0;
         for (int i = 0; i < nameArray.length; i++, j++) {
            nameArray[j] = new Name();
         }
         return nameArray; //Return Name Array
         
        
      }
    
       public static void printNameArray
       (Name[] nameArray){
         int j = 0;
         for (int i = 0; i < nameArray.length; i++, j++) {
         
           //nameArray = java.util.Arrays.toString(nameArray[j]);
            System.out.println(nameArray[j] + nameArray[j].initials());
           //  System.out.println(java.util.Arrays.toString(nameArray[j]));
         }
         
      }
   }
Attachments:
 
names.txt (217 bytes) (File Type Details) 
File input of names
 
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[+][-]06.15.2008 at 10:15AM PDT, ID: 21789079

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[+][-]06.15.2008 at 10:31AM PDT, ID: 21789115

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[+][-]06.15.2008 at 10:39AM PDT, ID: 21789139

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[+][-]06.15.2008 at 10:49AM PDT, ID: 21789168

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[+][-]06.15.2008 at 10:57AM PDT, ID: 21789186

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[+][-]06.15.2008 at 11:20AM PDT, ID: 21789247

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[+][-]06.15.2008 at 02:22PM PDT, ID: 21789763

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About this solution

Zone: JavaScript
Tags: Java Script
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Solution Provided By: Airyck666
Participating Experts: 3
Solution Grade: A
 
 
 
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