Opening a project in NetBeans

[wfsteadman]

Greetings all,
I am reading Data Structures & Algorithms in Java by: Robert Lafore and the book comes with Reader Files. So for example, I am looking at the chapter 4 directory where the queue files reside and I have 3 files.

2 .class files and a .java file

queue.class
queueApp.class
queue.java

the queue.java file contains both files it seems as there are two classes as shown in the code below:

What I am trying to figure out is if there is a more efficient way of importing this into NetBeans. Currently I am creating a project and naming it the same as the code with the main function in it and pasting that section of code, then creating another class and pasting that section of code. This just seems cumbersome and maybe I just don't know how to work with these files and get them into NetBeans. Any assistance or guidance would be appreciated.

Wally

// Queue.java
// demonstrates queue
// to run this program: C>java QueueApp
////////////////////////////////////////////////////////////////
class Queue
   {
   private int maxSize;
   private long[] queArray;
   private int front;
   private int rear;
   private int nItems;
//--------------------------------------------------------------
   public Queue(int s)          // constructor
      {
      maxSize = s;
      queArray = new long[maxSize];
      front = 0;
      rear = -1;
      nItems = 0;
      }
//--------------------------------------------------------------
   public void insert(long j)   // put item at rear of queue
      {
      if(rear == maxSize-1)         // deal with wraparound
         rear = -1;
      queArray[++rear] = j;         // increment rear and insert
      nItems++;                     // one more item
      }
//--------------------------------------------------------------
   public long remove()         // take item from front of queue
      {
      long temp = queArray[front++]; // get value and incr front
      if(front == maxSize)           // deal with wraparound
         front = 0;
      nItems--;                      // one less item
      return temp;
      }
//--------------------------------------------------------------
   public long peekFront()      // peek at front of queue
      {
      return queArray[front];
      }
//--------------------------------------------------------------
   public boolean isEmpty()    // true if queue is empty
      {
      return (nItems==0);
      }
//--------------------------------------------------------------
   public boolean isFull()     // true if queue is full
      {
      return (nItems==maxSize);
      }
//--------------------------------------------------------------
   public int size()           // number of items in queue
      {
      return nItems;
      }
//--------------------------------------------------------------
   }  // end class Queue
////////////////////////////////////////////////////////////////
class QueueApp
   {
   public static void main(String[] args)
      {
      Queue theQueue = new Queue(5);  // queue holds 5 items

      theQueue.insert(10);            // insert 4 items
      theQueue.insert(20);
      theQueue.insert(30);
      theQueue.insert(40);

      theQueue.remove();              // remove 3 items
      theQueue.remove();              //    (10, 20, 30)
      theQueue.remove();

      theQueue.insert(50);            // insert 4 more items
      theQueue.insert(60);            //    (wraps around)
      theQueue.insert(70);
      theQueue.insert(80);

      while( !theQueue.isEmpty() )    // remove and display
         {                            //    all items
         long n = theQueue.remove();  // (40, 50, 60, 70, 80)
         System.out.print(n);
         System.out.print(" ");
         }
      System.out.println("");
      }  // end main()
   }  // end class QueueApp
////////////////////////////////////////////////////////////////

[wfsteadman]

Greetings all,
I am reading Data Structures & Algorithms in Java by: Robert Lafore and the book comes with Reader Files. So for example, I am looking at the chapter 4 directory where the queue files reside and I have 3 files.

2 .class files and a .java file

queue.class
queueApp.class
queue.java

the queue.java file contains both files it seems as there are two classes as shown in the code below:

What I am trying to figure out is if there is a more efficient way of importing this into NetBeans. Currently I am creating a project and naming it the same as the code with the main function in it and pasting that section of code, then creating another class and pasting that section of code. This just seems cumbersome and maybe I just don't know how to work with these files and get them into NetBeans. Any assistance or guidance would be appreciated.

Wally

I did post this in the NetBeans section first, but that forum seems to be read quite less often, so I added it here also.

// Queue.java
// demonstrates queue
// to run this program: C>java QueueApp
////////////////////////////////////////////////////////////////
class Queue
   {
   private int maxSize;
   private long[] queArray;
   private int front;
   private int rear;
   private int nItems;
//--------------------------------------------------------------
   public Queue(int s)          // constructor
      {
      maxSize = s;
      queArray = new long[maxSize];
      front = 0;
      rear = -1;
      nItems = 0;
      }
//--------------------------------------------------------------
   public void insert(long j)   // put item at rear of queue
      {
      if(rear == maxSize-1)         // deal with wraparound
         rear = -1;
      queArray[++rear] = j;         // increment rear and insert
      nItems++;                     // one more item
      }
//--------------------------------------------------------------
   public long remove()         // take item from front of queue
      {
      long temp = queArray[front++]; // get value and incr front
      if(front == maxSize)           // deal with wraparound
         front = 0;
      nItems--;                      // one less item
      return temp;
      }
//--------------------------------------------------------------
   public long peekFront()      // peek at front of queue
      {
      return queArray[front];
      }
//--------------------------------------------------------------
   public boolean isEmpty()    // true if queue is empty
      {
      return (nItems==0);
      }
//--------------------------------------------------------------
   public boolean isFull()     // true if queue is full
      {
      return (nItems==maxSize);
      }
//--------------------------------------------------------------
   public int size()           // number of items in queue
      {
      return nItems;
      }
//--------------------------------------------------------------
   }  // end class Queue
////////////////////////////////////////////////////////////////
class QueueApp
   {
   public static void main(String[] args)
      {
      Queue theQueue = new Queue(5);  // queue holds 5 items
 
      theQueue.insert(10);            // insert 4 items
      theQueue.insert(20);
      theQueue.insert(30);
      theQueue.insert(40);
 
      theQueue.remove();              // remove 3 items
      theQueue.remove();              //    (10, 20, 30)
      theQueue.remove();
 
      theQueue.insert(50);            // insert 4 more items
      theQueue.insert(60);            //    (wraps around)
      theQueue.insert(70);
      theQueue.insert(80);
 
      while( !theQueue.isEmpty() )    // remove and display
         {                            //    all items
         long n = theQueue.remove();  // (40, 50, 60, 70, 80)
         System.out.print(n);
         System.out.print(" ");
         }
      System.out.println("");
      }  // end main()
   }  // end class QueueApp
////////////////////////////////////////////////////////////////

[DarrylBurke]

I did post this in the NetBeans section first, but that forum seems to be read quite less often, so I added it here also.

Don't do that again. Please go through the Forum Rules, particularly the second paragraph.

I'm merging the two threads.

db

[Art Vandelay]

Try this: File --> New Project --> Java project with existing sources. You will see when you can add folders with your existing source code--which will probably be, and probably should be, outside your typical netbeans project folder.

[wfsteadman]

Thanks for your reply. The problem is that the author took all the different class files and put them in one .java file so I can do what you suggested, but it doesn't recognize the main. I think I am just stuck creating a project and doing a copy and paste from the combined java file to separate class files. I believe the author did all the work from command line so no consideration for an IDE was taken

[MackSix]

I can create a new Java project, paste the code in the file and it runs just fine in a file that is named JavaApplication4.

What OS and version of NetBeans are you using?

Did you check Project Properties>>Run>>Main Class? Do you have the package declaration in the file correct?

I have projects full of different class files with main() in them and I just right click the file and choose "run file" and it works. If I add a new file with a class the same name as a class in another file, I just create a new package in the same project and put it there. You could have all of your book source code in the same project in NetBeans and do a "run file" on your program fie of interest. You can have all sorts of dependent class files in the project for any file with main() in it.