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Join Date: Jan 2007
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Help How do i change this JAVA Insertion sort object to Bubble Sort object

  #1  
Jan 28th, 2007
and when i add a new int data type my program has an error and yet when i add a new String data type it has no error


// objectSort.java
// demonstrates sorting objects (uses insertion sort)
// to run this program: C>java libmainsys
////////////////////////////////////////////////////////////////
class libary
  {
  private String booktitle;
  private String bookauthor;
  private String publisher;
  
  private int nofcop;
  //-----------------------------------------------------------
  public libary(String title, String author, String pub, int nfcp)
   {                // constructor
   booktitle = title;
   bookauthor = author;
   publisher = pub; 
  
   nofcop = nfcp;
   }
  //-----------------------------------------------------------
  public void displaylibary()
   {
   System.out.print("  Book Title: " + booktitle);
   System.out.print(", Book Author: " + bookauthor);
   System.out.print(", Book Publisher: " + publisher);
   
   System.out.println(",No Of Copies : " + nofcop);
   }
  //-----------------------------------------------------------
  public String getLast()      // get title
   { return booktitle; }
  } // end class libary
////////////////////////////////////////////////////////////////
class ArrayInOb
  {
  private libary[] nfcp;        // ref to array ypub
  private int nElems;        // number of data items
//--------------------------------------------------------------
  public ArrayInOb(int max)     // constructor
   {
   nfcp = new libary[max];        // create the array
   nElems = 0;            // no items yet
   }
//--------------------------------------------------------------
                   // put libary into array
  public void insert(String title, String author, String pub, int nofcop)
   {
   nfcp[nElems] = new libary(title, author, pub,  nofcop);
   nElems++;             // increment size
   }
//--------------------------------------------------------------
  public void display()       // displays array contents
   {
   for(int j=0; j<nElems; j++)    // for each element,
     nfcp[j].displaylibary();     // display it
   System.out.println("");
   }
//--------------------------------------------------------------
  public void insertionSort()
   {
   int in, out;
   for(out=1; out<nElems; out++) // out is dividing line
     {
     libary temp = nfcp[out];    // remove marked person
     in = out;          // start shifting at out
     while(in>0 &&        // until smaller one found,
        nfcp[in-1].getLast().compareTo(temp.getLast())>0)
      {
      nfcp[in] = nfcp[in-1];     // shift item to the right
      --in;          // go left one position
      }
     nfcp[in] = temp;        // insert marked item
     } // end for
   } // end insertionSort()
//--------------------------------------------------------------
  } // end class ArrayInOb
////////////////////////////////////////////////////////////////
class libmainsys
  {
  public static void main(String[] args)
   {
   int maxSize = 1000;       // array size
   ArrayInOb arr;         // reference to array
   arr = new ArrayInOb(maxSize); // create the array
   arr.insert("Java_how__to_program", "Patty_John", "Deitel", 201);
   arr.insert("System_Design", "Dexter_Smith", "Thomson", 202);
   arr.insert("Program_Design", "Lorraine_Paul", "About", 199);
   arr.insert("Computer_Architecture", "Paul_Andrew","Dzone", 206);
   arr.insert("Visual_Basic_How_To_ Program", "Tom_Jones", "Jeffereson_publication",  207);
   arr.insert("Information_ Management", "William_Peter", "Mcgraw_Hill", 195);
   arr.insert("Sofware_ Application", "Henry_Sam", "Pearson", 296);
   arr.insert("English", "Samantha_Julia", "James_Hill", 394);
   arr.insert("Web_Publishing", "Audrey_Cynthia", "Surg", 193);
   arr.insert("Human_Computer_Interaction", "Tony_Edward",  "Telde", 202);
   System.out.println("Before sorting:");
   arr.display();         // display items
   arr.insertionSort();      // insertion-sort them
   System.out.println("After sorting:");
   arr.display();         // display them again
   } // end main()
  } // end class libmainsys
Last edited by Ancient Dragon : Jan 28th, 2007 at 8:19 am. Reason: add code tags
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