My inventory.java project in school...

Question

AllyC 0 Newbie Poster

14 Years Ago

Good day!
My codes stated don't have errors, it run well, BUT, though this program is saving in notepad as .out and .txt, when i closed the dos console and then run the program again, it is not reading the added items in .out and .txt file. That's the problem, it should read/view/edit/searched/delete the previous record. This only reads the real-time running of program like the adding, viewing, searching, viewing functions.

Any suggestions will be much appreciated. Thank you.

import java.io.*;
import java.util.InputMismatchException;

public class www
{


		public static String categI[] = new String[100];
		public static String itemsI[] = new String[100];
		public static String empNameI[] = new String[100];
		public static String IDI[] = new String[100];
		public static String positI[] = new String[100];
		public static double priceI[] = new double[100];
		public static double itemsUsedI[] = new double[100];
		public static double remItemsI[] = new double[100];
		public static double totRemItemsI[] = new double[100];
		public static String dateI[] = new String[100];
		public static String timeI[] = new String[100];
        public static String acategI,aitemsI,aempNameI,aIDI,apositI;
		public static double apriceI,aitemsUsedI,aremItemsI,atotRemItemsI;
		public static String adateI,atimeI;

		public static int actr=0;
		public static char query;

	public static void main(String[] args) throws Exception
	{
		menu();
	}

	public static void menu() throws Exception
	{


		char c;

		do
		{
			System.out.println("Menu");
			System.out.println("A = Add");
			System.out.println("B = View/Print");
			System.out.println("C = Edit");
			System.out.println("D = Delete");
			System.out.println("E = Search");
			System.out.println("F = Exit");
			System.out.print("Enter your choice: ");
			c=Character.toUpperCase((char) System.in.read());
			System.in.read(); System.in.read();

			switch(c)
			{
				case 'A':
				p1();
				break;

				case 'B':
				p2();
				break;

				case 'C':
				p3();
				break;

				case 'D':
				p4();
				break;

				case 'E':
				p5();
				break;

				default: System.out.println("Exiting...");
				break;
			}
		}while(c!='F');
	}

	public static void p1() throws Exception
	{
		try
		{
		BufferedReader x = new BufferedReader(new InputStreamReader(System.in));
		String y;
		PrintWriter outputStream = null;
		FileWriter fStream = new FileWriter("C:/inventory.txt", true);
		BufferedWriter out = new BufferedWriter(fStream);




		try
		{
			outputStream = new PrintWriter(new FileOutputStream("C:/inventory.out", true));
		}

		catch(FileNotFoundException excep)
		{
			System.err.printf("Exception", excep);
			System.exit(0);
		}

		System.out.print("Category: ");
		acategI = x.readLine();
		System.out.print("Name of item: ");
		aitemsI = x.readLine();
		System.out.print("Price each item: ");
		y = x.readLine();
		apriceI = Double.parseDouble(y);
		System.out.print("Number of items used: ");
		y = x.readLine();
		aitemsUsedI = Double.parseDouble(y);
		System.out.print("Remaining items: ");
		y = x.readLine();
		aremItemsI = Double.parseDouble(y);
		atotRemItemsI = aremItemsI - aitemsUsedI;
		System.out.print("Inventorer's name: ");
		aempNameI = x.readLine();
		System.out.print("ID combination: ");
		aIDI = x.readLine();
		System.out.print("Position: ");
		apositI = x.readLine();
		System.out.print("Date of inventory [mm/dd/yy]: ");
		adateI = x.readLine();
		System.out.print("Time of inventory [hr:min:sec]: ");
		atimeI = x.readLine();

		System.out.println("Are you sure you want to add this inventory record [y/n]: ");
		query = Character.toUpperCase((char) System.in.read());
		System.in.read(); System.in.read();

		if(query=='Y')
		{
		categI[actr] = acategI;
		itemsI[actr] = aitemsI;
		empNameI[actr] = aempNameI;
		IDI[actr] = aIDI;
		positI[actr] = apositI;
		priceI[actr] = apriceI;
		itemsUsedI[actr] = aitemsUsedI;
		remItemsI[actr] = aremItemsI;
		dateI[actr] = adateI;
		timeI[actr] = atimeI;
		totRemItemsI[actr] = atotRemItemsI;
		actr++;

		outputStream.println("Category: " +acategI);
		out.write("Category: " +acategI);
		outputStream.println("Name of item: " +aitemsI);
		out.write("Name of item: " +aitemsI);
		outputStream.println("Price each item: " +apriceI);
		out.write("Price each item: " +apriceI);
		outputStream.println("Number of items used: " +aitemsUsedI);
		out.write("Number of items used: " +aitemsUsedI);
		outputStream.println("Remaining items: " +aremItemsI);
		out.write("Remaining items: " +aremItemsI);
		System.out.println("Total remaining items: " +atotRemItemsI);
		outputStream.println("Total remaining items: " +atotRemItemsI);
		out.write("Total remaining items: " +atotRemItemsI);
		outputStream.println("Inventorer's name: " +aempNameI);
		out.write("Inventorer's name: " +aempNameI);
		outputStream.println("ID combination: " +aIDI);
		out.write("ID combination: " +aIDI);
		outputStream.println("Position: " +apositI);
		out.write("Position: " +apositI);
		outputStream.println("Date of inventory [mm/dd/yy]: " +adateI);
		out.write("Date of inventory [mm/dd/yy]: " +adateI);
		outputStream.println("Time of inventory [hr:min:sec]: " +atimeI);
		out.write("Time of inventory [hr:min:sec]: " +atimeI);
			outputStream.close();
		out.close();

		}

		else
		{
			spacing();
		}

		outputStream.close();
		out.close();


	}

	catch(IOException e)
	{
		e.printStackTrace();
	}

	}


	public static void spacing()
	{
		System.out.print("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
	}

public static void p2() throws Exception
    {
    try
    {
       FileReader fr = new FileReader( "c:/inventory.out" );
       BufferedReader br = new BufferedReader( fr );

       String stringRead = br.readLine( );

       while( stringRead != null )
       {
          System.out.println( stringRead );
          stringRead = br.readLine( );
       }

       br.close( );
    }

    catch( FileNotFoundException fnfe )
    {
      System.out.println( "Unable to find inventory.out, exiting" );
    }

    catch( IOException ioe )
    {
      ioe.printStackTrace( );
    }
    }
	public static void p3()throws Exception
	{

		BufferedReader x = new BufferedReader(new InputStreamReader(System.in));
		String y;
	PrintWriter outputStream = null;
	FileWriter fStream = new FileWriter("C:/inventory.txt", true);
	BufferedWriter out = new BufferedWriter(fStream);


		try
		{
			outputStream = new PrintWriter(new FileOutputStream("C:/inventory.out", true));
		}

		catch(FileNotFoundException excep)
		{
			System.err.printf("Exception", excep);
			System.exit(0);
		}
	boolean retbol = false;
	int indx=0;

		spacing();
		System.out.print("-->EDIT RECORDS<--\n\n\n");
		System.out.print("Search name of item to be edited: ");
		String edititemsI = x.readLine();

		for(int i=0;i<itemsI.length;i++)
		{
			if(itemsI[i] !=null)
			{

				if(edititemsI.equalsIgnoreCase(itemsI[i]))
				{
					retbol = true;
					indx = 0;
				}

			}
		}

		if(retbol==true)
		{
		System.out.print("Category: ");
		String ecategI = x.readLine();
		System.out.print("Name of item: ");
		String eitemsI = x.readLine();
		System.out.print("Price each item: ");
		y = x.readLine();
		double epriceI = Double.parseDouble(y);
		System.out.print("Number of items used: ");
		y = x.readLine();
		double eitemsUsedI = Double.parseDouble(y);
		System.out.print("Remaining items: ");
		y = x.readLine();
		double eremItemsI = Double.parseDouble(y);
		double etotRemItemsI = eremItemsI - eitemsUsedI;
		System.out.print("Inventorer's name: ");
		String eempNameI = x.readLine();
		System.out.print("ID combination: ");
		String eIDI = x.readLine();
		System.out.print("Position: ");
		String epositI = x.readLine();
		System.out.print("Date of inventory [mm/dd/yy]: ");
		String edateI = x.readLine();
		System.out.print("Time of inventory [hr:min:sec]: ");
		String etimeI = x.readLine();

		System.out.println("Are you sure you want to edit this inventory record [y/n]: ");
		query = Character.toUpperCase((char) System.in.read());
		System.in.read(); System.in.read();


		if(query=='Y')
		{
		categI[actr] = ecategI;
		itemsI[actr] = eitemsI;
		empNameI[actr] = eempNameI;
		IDI[actr] = eIDI;
		positI[actr] = epositI;
		priceI[actr] = epriceI;
		itemsUsedI[actr] = eitemsUsedI;
		remItemsI[actr] = eremItemsI;
		dateI[actr] = edateI;
		timeI[actr] = etimeI;
		totRemItemsI[actr] = etotRemItemsI;
		actr++;

		outputStream.println("Category: " +ecategI);
		out.write("Category: " +ecategI);
		outputStream.println("Name of item: " +eitemsI);
		out.write("Name of item: " +eitemsI);
		outputStream.println("Price each item: " +epriceI);
		out.write("Price each item: " +epriceI);
		outputStream.println("Number of items used: " +eitemsUsedI);
		out.write("Number of items used: " +eitemsUsedI);
		outputStream.println("Remaining items: " +eremItemsI);
		out.write("Remaining items: " +eremItemsI);
		System.out.println("Total remaining items: " +etotRemItemsI);
		outputStream.println("Total remaining items: " +etotRemItemsI);
		out.write("Total remaining items: " +etotRemItemsI);
		outputStream.println("Inventorer's name: " +eempNameI);
		out.write("Inventorer's name: " +eempNameI);
		outputStream.println("ID combination: " +eIDI);
		out.write("ID combination: " +eIDI);
		outputStream.println("Position: " +epositI);
		out.write("Position: " +epositI);
		outputStream.println("Date of inventory [mm/dd/yy]: " +edateI);
		out.write("Date of inventory [mm/dd/yy]: " +edateI);
		outputStream.println("Time of inventory [hr:min:sec]: " +etimeI);
		out.write("Time of inventory [hr:min:sec]: " +etimeI);


		}

		else
		{
		 	System.out.print("Item not found!");

		}

		outputStream.close();
		out.close();


	}
	}

	public static void p4()throws Exception
	{

		BufferedReader x = new BufferedReader(new InputStreamReader(System.in));
		String y;
	try
	    {
	       FileReader fr = new FileReader( "c:/inventory.out" );
	       BufferedReader br = new BufferedReader( fr );

	       String stringRead = br.readLine( );

	       while( stringRead != null )
	       {
	          System.out.println( stringRead );
	          stringRead = br.readLine( );
	       }
	boolean retbol = false;
	int indx=0;


		System.out.print("-->DELETE RECORDS<--\n\n\n");
		System.out.print("Name of item to be deleted: ");
		String deitems = x.readLine();

		for(int i=0;i<itemsI.length;i++)
		{
			if(itemsI[i] !=null)
			{
				if(deitems.equalsIgnoreCase(itemsI[i]))
				{
					retbol = true;
					indx = i;
				}

		}

		if(retbol==true)
		{

		System.out.println("Category: " +categI[i]);
		System.out.println("Name of item: " +itemsI[i]);
		System.out.println("Price each item: " +priceI[i]);
		System.out.println("Number of items used: " +itemsUsedI[i]);
		System.out.println("Remaining items: " +remItemsI[i]);
		System.out.println("Total remaining items: " +totRemItemsI[i]);
		System.out.println("Inventorer's name: " +empNameI[i]);
		System.out.println("ID combination: " +IDI[i]);
		System.out.println("Position: " +positI[i]);
		System.out.println("Date of inventory [mm/dd/yy]: " +dateI[i]);
		System.out.println("Time of inventory [hr:min:sec]: " +timeI[i]);
		System.out.println("");

			System.out.print("Are you sure to delete this record?[y]-y/[n]-no: ");
			char query = Character.toUpperCase((char) System.in.read());
			System.in.read(); System.in.read();

			if(query=='Y')
			{

		categI[i] = null;
		itemsI[i] = null;
		empNameI[i] = null;
		IDI[i] = null;
		positI[i] = null;
		priceI = null;
		itemsUsedI = null;
		remItemsI = null;
		dateI[i] = null;
		timeI[i] = null;
		totRemItemsI = null;


				for(int j=indx+1;j<itemsI.length;j++)
				{
		categI[j-1] = categI[j];
		itemsI[j-1] = itemsI[j];
		empNameI[j-1] = empNameI[j];
		IDI[j-1] = IDI[j];
		positI[j-1] = positI[j];
		priceI[j-1] = priceI[j];
		itemsUsedI[j-1] = itemsUsedI[j];
		remItemsI[j-1] = remItemsI[j];
		dateI[j-1] = dateI[j];
		timeI[j-1] = timeI[j];
		totRemItemsI[j-1] = totRemItemsI[j];

				}

				System.out.println("Record succesfully deleted!");


			}

		}
		else
		{
			System.out.print("Item not found!");
		}
		br.close( );

		 }
	 }


	    catch( FileNotFoundException fnfe )
		 {
	  System.out.println( "Unable to find inventory.out, exiting" );
	     }

       catch( IOException ioe )
	    {
		ioe.printStackTrace( );
	    }


	}





	public static void p5()throws Exception
	{

		BufferedReader x = new BufferedReader(new InputStreamReader(System.in));
		String y;

	    try
	    {
	       FileReader fr = new FileReader( "c:/inventory.txt" );
	       BufferedReader br = new BufferedReader( fr );

	       String stringRead = br.readLine( );

	       while( stringRead != null )
	       {
	          System.out.println( stringRead );
	          stringRead = br.readLine( );
	       }

	boolean retbol = false;
	int indx=0;

		spacing();
		System.out.print("-->SEARCH RECORDS<--\n\n\n");
		System.out.print("Name of item to be searched: ");
		String seitemsI = x.readLine();

		for(int i=0;i<itemsI.length;i++)
		{
			if(itemsI[i] !=null)
			{

				if(seitemsI.equalsIgnoreCase(itemsI[i]))
				{
					retbol = true;
					indx = i;
				}

			}
	}

		if(retbol==true)
		{
		System.out.println("Category: " +categI[indx]);
		System.out.println("Name of item: " +itemsI[indx]);
		System.out.println("Price each item: " +priceI[indx]);
		System.out.println("Number of items used: " +itemsUsedI[indx]);
		System.out.println("Remaining items: " +remItemsI[indx]);
		totRemItemsI[indx]  = remItemsI[indx] - itemsUsedI[indx];
		System.out.println("Total remaining items: " +totRemItemsI[indx]);
		System.out.println("Inventorer's name: " +empNameI[indx]);
		System.out.println("ID combination: " +IDI);
		System.out.println("Position: " +positI[indx]);
		System.out.println("Date of inventory [mm/dd/yy]: " +dateI[indx]);
		System.out.println("Time of inventory [hr:min:sec]: " +timeI[indx]);
		}

		else
		{
			System.out.print("Item not found!");
		}

		 br.close( );
		 }

	    catch( FileNotFoundException fnfe )
		 {
	  System.out.println( "Unable to find inventory.out, exiting" );
	     }

       catch( IOException ioe )
	    {
		ioe.printStackTrace( );
	    }


	}

}

java

Edited 14 Years Ago by AllyC because: n/a

2 Contributors
3 Replies
157 Views
1 Day Discussion Span
Latest Post 14 Years Ago Latest Post by AllyC

javaAddict 900 Nearly a Senior Poster

14 Years Ago

Are the data saved correctly? If the problem was only with the reading then you didn't have to post all this code, because that will make people reluctant to reply. I would suggest this:
Have a separate class with methods for reading and writing:

class IOManager() {
   public static void methodForWriting(File file, .....) {

   }

   public static <List of objects you want to return> methodForReading(File file, .....) {

   }
}

And in another class test them:

public static void main(String [] args) {

  IOManager.methodForWriting(....);
   // open the file to see they are written

  IOManager.methodForReading(....);
  // print what you get
}

Once you get them to work call them from your main class where you have the functionality for those operation, or post any troubles you might have.

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AllyC 0 Newbie Poster · Answer 1 · 2010-01-02T00:31:20+00:00

AllyC 0 Newbie Poster

14 Years Ago

^

Edited 14 Years Ago by AllyC because: n/a

AllyC 0 Newbie Poster · Answer 2 · 2010-01-03T15:24:23+00:00

AllyC 0 Newbie Poster

14 Years Ago

Thank you for the suggestion javaAddict.