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Thread: Can anybody help me fix this, what I am supposed to do is at the top

  1. #1
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    Default Can anybody help me fix this, what I am supposed to do is at the top

    [HTML][/HTML]import java.awt.Color;
    import java.awt.Font;
    import java.io.File;
    import java.util.Scanner;
     
    import javax.swing.JOptionPane;
    import javax.swing.UIManager;
    import javax.swing.plaf.FontUIResource;
     
    /********************************************************************
     * Written by: 
     * Period: 1
     * 
     * ASSIGNMENT: Write a program that lets the user randomly fill a 
     * seating chart with students names, which are read in from a data
     * file.  The seating chart should be stored in a 2-D array of Strings.
     * Your program should:
     *  - Ask the user how many rows and columns of desks are in the
     *  		classroom.
     *  - Declare the 2-D array for the number of rows & columns entered.
     *  - Ask the user for the name of the file that contains the students'
     *  		names.
     *  - Randomly fill the array with the students' names.
     *  - Print the array in a JOP window.  Your rows and columns should
     *  		be NEATLY lined up.  Here are some things to help you:
     *  		- One of the fonts that evenly prints all characters is 
     *  				Monospac821 DL
     *  		- I will not enter more than 5 columns
     *  		- The longest student name is 12 characters
     *  - If the number of students is greater than the number of desks
     *  		then you should print an appropriate message.  Your 
     *  		program should NOT go into an endless loop!
     *  
     *  Remember your main shouldn't contain code - just method calls.
     *  Your methods should fairly short.
     *  
     * HAND IN:  Make a jar file, put it in my hand in folder and print.
     * 
     * GRADING: 50 points)
     * 
     * _____  your program is correctly formatted (5 points)
     * _____  2-D arrays are used correctly (15 points) 
     * _____  methods are used correctly (10 points)
     * _____  your main does not contain much code (5 points)
     * _____  your seating chart is neatly printed (5 points)
     * _____  your program runs correctly (10 points) 
     * 
     *******************************************************************/
    public class SeatingChart
    {
    	public static void changeJOP()
    	{
    		// Here are the commands to change the color & fonts in
    		//	the showMessageDialog() window:
     
    		// The font of the message text
    		UIManager.put("Label.font", new FontUIResource
    				(new Font("Lucida Console", Font.BOLD, 28)));
    		// The color of the message text
    		UIManager.put("OptionPane.messageForeground",Color.black);
     
    		// The color of the panel 
    		UIManager.put("Panel.background",Color.yellow);
    		// The color around the outside of the panel
    		UIManager.put("OptionPane.background",Color.white);
     
     
    		// Buttons at bottom
    		UIManager.put("Button.background",new Color(192,0,0));
    		UIManager.put("Button.foreground", new Color(12,51,139));
    		UIManager.put("Button.font", new FontUIResource
    				(new Font("Monospac821 DL", Font.BOLD, 14)));
    	}
    	public static int rows()
    	{
    		int r= Integer.parseInt(JOptionPane.showInputDialog("Enter the number of rows"));
    		return r;
    	}
    	public static int columns()
    	{
    		int c= Integer.parseInt(JOptionPane.showInputDialog("Enter the number of columns"));
    		return c;
    	}
    	public static String enterFileName()
    	{
    		String file=JOptionPane.showInputDialog("Enter a file name");
    		return file;
    	}
    	public static int fillNames(String fileName, String[][] seats)
    	{
    		int count=0;
    		try{
    			Scanner inFile= new Scanner(new File(fileName));
     
     
     
    			while(inFile.hasNext()){
    				inFile.nextLine();
    				count++;
    			}
    			inFile.close();
    		}catch(Exception e){
    			JOptionPane.showMessageDialog(null,"error reading file: "+e);
    		}
    		try{
    			Scanner inFile= new Scanner(new File(fileName));
    			int max=(int)(Math.random()*seats.length);
    			int gro=(int)(Math.random()*seats[0].length);
    			while(inFile.hasNext()){
     
    				seats[max][gro]=inFile.nextLine();
    			}
    			inFile.close();
    		}catch(Exception e){
    			JOptionPane.showMessageDialog(null,"error reading file: "+e);
    		}
    		if(count<seats.length*seats[0].length);
    		return count;
    	}
     
    	public static void output(String seats[][])
    	{
    		String out="";
    		for(int r=0; r<seats.length; r++){
    			for(int c=0; c<seats[0].length; c++)
    				out+=seats[r][c];
    			out+="\n";
    		}
    		JOptionPane.showMessageDialog(null, out);
     
     
    	}
    	public static void emptyDesk(String[][] seats)
    	{
    		for(int r=0; r<seats.length; r++)
    		{
    			for(int c=0; c<seats[0].length; c++)
    				if(seats[r][c]==null)
    					seats[r][c]="Empty";	
    		}
    	}
    	public static void nameSpaces(String[][] seats)
    	{
    		for(int r=0; r<seats.length; r++)
    		{
    			for(int c=0; c<seats[0].length; c++)
    				while(seats[r][c].length()<15)
    					seats[r][c]+=" ";	
    		}
    	}
    	public static void main(String[] args)
    	{
    		changeJOP();
    		int row=rows();
    		int col=columns();
    		String[][] seats= new String[row][col];
    		String fileName = enterFileName();
    		fillNames(fileName, seats);
    		emptyDesk(seats);
    		nameSpaces(seats);
    		output(seats);
     
     
    	}
    }

    I am having trouble getting the random number generator to select all the students (data) from the text file, sometimes it selects 10 or 11 or 8 when there are 16 pieces of data. Thanks!!
    Last edited by peplo1214; February 18th, 2012 at 06:49 AM.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Can anybody help me fix this, what I am supposed to do is at the top

    Do you have any specific questions?

    Please Edit your post and wrap your code with[code=java]<YOUR CODE HERE>[/code] to get highlighting

  3. The Following User Says Thank You to Norm For This Useful Post:

    peplo1214 (February 18th, 2012)

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