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JTable

Java Table

  1. Wide JTables

    by , 04-26-2012 at 08:49 PM
    What could be done in case there are too wider JTables present?

    • They could be placed in JScrollPane so complete table gets scrolled.
    • Column’s width could be changed by the user so that the date could be squeezed into the space present, which would widen column, as per requirements.
    • Shortcuts could be given to the users for configuration of width constellations of the multiple columns.
    • If 2 or 3 rows are attempted to be used per data item, it gets awkward. A perfect grid would
    ...
    Tags: wide jtables Add / Edit Tags
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    JTable
  2. How JTables Work

    by , 04-26-2012 at 08:48 PM
    One of the most important things that shall be made understood is that data gets live just in DataModel. Rendered data is that one which is visible currently. No giant sort of bit map scrolling of the screen is present. Correspondent grid of the JComponents is also not present. Not a single JComponent’s row is even present. All of the cells are rendered by the TableCellRenderer which recycles the similar JComponent. New rows are brought forward from the DataModel when it is scrolled by the user. ...
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    JTable
  3. JTable Classes and Interfaces

    by , 04-26-2012 at 08:47 PM
    JTable specified functions could be present in JTable class or other classes which are present in package javax.swing.table. Majority of the programs present shall be importing both classes present, as following:
    Java Code:
    import javax.swing.*;
     import javax.swing.table.*;
    It shall be noted that scheme of package naming that is present in Swing change when JFC version1.1 came. Before this, com.sun.java.swing was used to start the swing packages. For this JFC VERSION1.1, ...
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    JTable
  4. JTable Printing

    by , 04-26-2012 at 08:47 PM
    Simple API is provided by the JTable to print the tables. Priting of the table could easily be done by invoking JTable.print, with no arguments:
    Java Code:
    try {
        if (! table.print()) {
            System.err.println("User cancelled printing");
        }
    } catch (java.awt.print.PrinterException e) {
        System.err.format("Cannot print %s%n", e.getMessage());
    }
    At normal swing, print is invoked that will bring the ...
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    JTable
  5. Specifying Tool Tips for Cells

    by , 04-26-2012 at 08:46 PM
    Tool tip text that has been displayed is found out for a table cell by the renderer of cell, by default. But it might sometimes much simple thing to make specification of the tool tip text, by overriding the implementation of JTable of the method getToolTipText. How to use these 2 techniques have been shown in this section.

    For addition of the tool tip in cell by renderer, first thing that needs to be done is to create or get the cell renderer. After this make it sure that JComponent ...
    Categories
    JTable
  6. Using Custom Renderers

    by , 04-26-2012 at 08:45 PM
    This section shows how cell renderer could be specified or created. “Type specific” cell renderer could be set by the help of JTable setDefaultRenderer method. Cells could be specified in a specific column by using a renderer. However, TableColumn method setCellRenderer is used usually by people. A “Cell specific” renderer could be specified by creation of subclass JTable.
    Image or text could easily be customized that are rendered by DefaultTableCellRenderer. Just one subclass is created ...
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    JTable
  7. Creating a Table Model

    by , 04-26-2012 at 08:45 PM
    A table model object is used by every table object for management of the actual data of the table. Interface TableModel shall be implemented by the table model object. If table model object is not provided by the programmer them DefaultTableModel instance is automatically created by the the JTable. This kind of relationship is given below:

    SimpleTableDemo uses the JTable constructor to create table model, along with code:
    Java Code:
    new AbstractTableModel() {
        public
    ...
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    JTable
  8. Setting and Changing Column Widths of JTable

    by , 04-26-2012 at 08:44 PM
    All tables which are there in a table by default start with equivalent width and columns are automatically filling up the whole table’s width. When table has become narrow or wide, all widths of column would be changed appropriately.


    When a column is resized by dragging the right border then size of the table or the size of the column must change. Size of the table remains similar by default & all columns which are right to the drag point would be resized so that space ...
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    JTable
  9. Adding a Table to a Container

    by , 04-26-2012 at 08:43 PM
    Scroll pane creation has a typical code which servers to be a container, for a table.

    Java Code:
    JScrollPane scrollPane = new JScrollPane(table);
    table.setFillsViewportHeight(true);
    In this snippet, 2 lines would be doing the given:

    • Along with an argument, constructor JScrollPane would be invoked which will be referring to the table objects. A scroll pane would be created as a container for sake of table; automatically addition of the table ...
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    JTable
  10. JTable Introduction

    by , 04-26-2012 at 08:42 PM
    Many facilities are present in a JTable which makes the rendering and editing possible. But defaults are also provided for such features hence to setup the tables very easily. For instance, a table could be setup with 10 columns and 10 rows of numbers.
    Java Code:
          TableModel dataModel = new AbstractTableModel() {
              public int getColumnCount() { return 10; }
              public int getRowCount() { return 10;}
              public Object getValueAt(int row, int col)
    ...
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    JTable
  11. JTable MVC

    by , 01-08-2012 at 12:34 PM
    Swing uses a modified version of Model View Controller design pattern. Model, view and controller layers are separated by MVC design pattern.

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    Swing MVC Architecture

    • Component (JTable, JTree, and JList): These components coordinate.
    • Model (TableModel): charged with storing the data.
    • UIDelegate: It is responsible for getting the data from model and rendering it to screen.
    Tags: jtable, mvc Add / Edit Tags
    Categories
    Architecture , JTable
  12. How to use model for your table in Swing application

    by , 12-09-2011 at 09:06 AM
    Swing provides a very flexible widget, it is the JTable. Using the JTable component, you can display tabular data in form of columns and rows, plus allowing the user to edit and save the data if needed.

    Why need to use a model

    The Java Swing architecture separates the view and the model of a UI component. The view is how the component is drawn on the screen and gets changed if the user interacts with the component. The model is how data is structured and organized. The ...

    Updated 12-09-2011 at 03:35 PM by Java Swing

    Categories
    JTable , Model