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Thread: TableModel problem Java

  1. #1
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    Default TableModel problem Java

    Im developing a program that has a JTable in it. The JTable should display a checkbox per row, the file name and the file path.
    The problem im having is Im new to java and im having a hard time understanding how to make custom table model. This is what i have so far. Excuse me for all the bad coding in it. Thank you
    /*
     * To change this template, choose Tools | Templates
     * and open the template in the editor.
     */
     
    package trialfiletablemodel;
     
    import java.awt.BorderLayout;
    import java.io.File;
    import java.util.LinkedList;
    import javax.swing.JFrame;
    import javax.swing.JScrollPane;
    import javax.swing.JTable;
    import javax.swing.table.AbstractTableModel;
     
     
    /**
     * String fileName,filePath;
     * @author rosado
     */
     
    public class Main {
     
     
     
        public static void main(String[] args) {
        String fileName,filePath;
        File f = new File("//home//guest//rosado//NetBeansProjects//PriKL_Platform//TrialFileTableModel//src//trialfiletablemodel//TableModelTrial.txt");
        System.out.println(f.exists()); //checks if file exists
        JFrame frame = new JFrame("Table Test");
        TableData data = new TableData();
        fileName = data.getFileName(f);
        filePath = data.getFilePath(f);
     
        JTable table = new JTable(new FileTableModel());
        table.setValueAt(false, 0, 0);
        table.setValueAt(fileName, 0, 1);
        table.setValueAt(filePath, 0, 2);
     
     
        JScrollPane scrollpane = new JScrollPane(table);
        frame.getContentPane().add(scrollpane,BorderLayout.CENTER);
        frame.setSize(300,150);
        frame.setVisible(true);
     
        /*
        ArrayList <String> data = new ArrayList<String>();
        data.add(f.getAbsolutePath());
        data.add(f.getName());
        for(int x = 0; x<data.size();x++)
        {
            System.out.println(data.get(x));
        }
          */  
     
     
        }
    }
    class FileTableModel extends AbstractTableModel {
     
          public String[] columnNames = { "Selection", "File Name","File Path" };
     
          LinkedList <Object> tabledata = new LinkedList<Object>();
          public Class[]  columnTypes = {Boolean.class,String.class,String.class};
     
     
          //Constructor
           public FileTableModel(){
               super();
     
           }
     
      @Override
      public int getColumnCount() {
          return columnNames.length;
      }
        @Override
        public Class getColumnClass(int column){
             return (getValueAt(0, column).getClass());
        }
        @Override
      public String getColumnName(int column) {
        return columnNames[column];
      }
     
        @Override
      public int getRowCount() {
        return (tabledata.size());
      }
     
        @Override
      public Object getValueAt(int row, int col) {
            float index = (row/2);
     
            if ((index % 2) == 0)
                {
                    index =(int) index;
                }
            else 
                index = (int) index +1;
     
     
         return tabledata.get((int) index);
     }
     
        @Override
      public void setValueAt(Object value, int row, int column) {
       /*   TableData d = new TableData();
          Boolean fs = false;
          String fn = d.getFileName(f);
          String fp = d.getFilePath(f);
          tabledata.addLast(fs);
          tabledata.addLast(fn);
          tabledata.addLast(fp);
         */ 
     
       }
     
        @Override
      public boolean isCellEditable(int row, int column) {
            if(column == 0){
                return false;
            }
            else {
                return(true);
            }
      }
     
    }
     
    class TableData {
        private Boolean selection;
        private String fileName;
        private String filePath;
     
        public TableData()
        {
     
        }
        public TableData(Boolean sel, String name,String path)
        {
            selection = sel;
            fileName = name;
            filePath = path;
        }
     
        public Boolean getSelection()
        {
            return selection;
        }
        public String getFileName(File f)
        {
            fileName = f.getName();
            return fileName;
        }
        public String getFilePath(File f)
        {
            filePath = f.getAbsolutePath();
            return filePath;
        }
     
        public void setSelection(Boolean sel)
        {
            selection = sel;
        }
     
        public void setFileName(String name)
        {
            fileName = name;
        }
     
        public void setFilePath(String path)
        {
            filePath = path;
        }
    }
    Last edited by KevinWorkman; June 23rd, 2011 at 11:52 AM. Reason: added highlight tags


  2. #2
    Crazy Cat Lady KevinWorkman's Avatar
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    Default Re: TableModel problem Java

    When posting code, make sure you use the highlight tags. I added them for you this time.

    What's the actual problem? Where are you stuck? Did you read through this: How to Use Tables (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Swing Components)
    Useful links: How to Ask Questions the Smart Way | Use Code Tags | Java Tutorials
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  3. #3
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    Default Re: TableModel problem Java

    The problem is that when i open a new file it should create a new row on the table with the name and file path of the file and a checkbox. I tried running it but it doesnt display anything.

  4. #4
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    Default Re: TableModel problem Java

    I don't really understand the logic in your table model- why are you using a linked list instead of a 2-dimensional array or List?
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  5. #5
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    Default Re: TableModel problem Java

    This is just the tablemodel . The program really will let the user open up a file. It will load the file info to the JTable, open up and editor. The user can open more than one file at a time. So that why i used linked list. the checkbox will be to select which files to close with a jbutton.
    Thanks!!

  6. #6
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    Default Re: TableModel problem Java

    The table will just display the files currently open.

  7. #7
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    Default Re: TableModel problem Java

    ...I don't really know what that has to do with your problem.

    Hint: Take a look at what your getRowCount() method is returning.
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