Jtable java

The JTable class is a part of Java Swing Package and is generally used to display or edit two-dimensional data that is having both rows and columns. It is similar to a spreadsheet, jtable java.

This article shows a simple example of JTable. This is similar to a spreadsheet. Let us consider some examples. Say that you want to display a list of employees belonging to an organization. This should display the various attributes of employees. For example, employee id, name, hourly rate, part-time status etc.

Jtable java

Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available. With the JTable class you can display tables of data, optionally allowing the user to edit the data. JTable does not contain or cache data; it is simply a view of your data. Here is a picture of a typical table displayed within a scroll pane:. The rest of this section shows you how to accomplish some common table-related tasks. Here are the topics this section covers:. Or, to compile and run the example yourself, consult the example index. Click the cell that contains "Snowboarding". The entire first row is selected, indicating that you have selected Kathy Smith's data. A special highlight indicates that the "Snowboarding" cell is editable. Generally, you begin editing a text cell by double-clicking it. Position the cursor over "First Name". Now press the mouse button and drag to the right. As you can see, users can rearrange columns in tables.

This example is fairly simplistic; more typically, a Comparator implementation is a subclass of java.

The JTable has many facilities that make it possible to customize its rendering and editing but provides defaults for these features so that simple tables can be set up easily. By default, a JTable will adjust its width such that a horizontal scrollbar is unnecessary. Note that if you wish to use a JTable in a standalone view outside of a JScrollPane and want the header displayed, you can get it using getTableHeader and display it separately. To enable sorting and filtering of rows, use a RowSorter. You can set up a row sorter in either of two ways: Directly set the RowSorter. For example: table. For example: setAutoCreateRowSorter true.

This article explains how to write an editable JTable and proceeds to show an example. Understanding the TableModel:. Let us consider an example. We want to display the employee details in a table and also allow the user to edit the values directly in the table. The employee details would include fields like id, name, hourly rate and part-time status. Before we start looking at the code, we need to understand about the model of JTable. Let us try and understand why this is needed and how this helps us. In simple terms, the Model-View-Controller paradigm dictates that the data be held in a Model.

Jtable java

The JTable has many facilities that make it possible to customize its rendering and editing but provides defaults for these features so that simple tables can be set up easily. By default, a JTable will adjust its width such that a horizontal scrollbar is unnecessary. Note that if you wish to use a JTable in a standalone view outside of a JScrollPane and want the header displayed, you can get it using getTableHeader and display it separately. To enable sorting and filtering of rows, use a RowSorter. You can set up a row sorter in either of two ways: Directly set the RowSorter. For example: table.

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Comparator objects to sort its rows. In both modes, it spreads table rows naturally in sequence across multiple pages, fitting as many rows as possible per page. Sets whether or not this table is always made large enough to fill the height of an enclosing viewport. If viewColumnIndex is less than zero, returns viewColumnIndex. As of 1. Returns a rectangle for the cell that lies at the intersection of row and column. Suggest Changes. During the rendering of cells the renderer is fetched from a Hashtable of entries according to the class of the cells in the column. However, for performance reasons, Swing tables are implemented differently. The individual sizes are calculated by taking the original preferred sizes and adding a share of the DELTA - that share being based on how far each preferred size is from its limiting bound minimum or maximum. The JTable class is a part of Java Swing Package and is generally used to display or edit two-dimensional data that is having both rows and columns. Point getCellRect public Rectangle getCellRect int row, int column, boolean includeSpacing Returns a rectangle for the cell that lies at the intersection of row and column. During UI adjustment, change subsequent columns to preserve the total width; this is the default behavior. Note that this may be different from the number of columns in the table model. Setting rowSelectionEnabled and columnSelectionEnabled to different values has the side effect of also setting cellSelectionEnabled to false.

We may make money when you click on links to our partners. Learn More. In Java, tables are used to arrange data into columns and rows.

You might expect each cell in a table to be a component. A modal progress dialog, with an abort option, will be shown for the duration of printing. Returns the index of the corresponding column in the model. When the code is run, we get the following output:. Header and footer text can be added to the output by providing MessageFormat arguments. SimpleTable- SelectionDemo. A basic table with no custom model. When this property changes, a property change event with name "dropLocation" is fired by the component. LayoutManager , Container. Java Swing JMenuBar. Note: Throughout the table package, the internal implementations always use this method to provide renderers so that this default behavior can be safely overridden by a subclass. You can define your own subclass, use the factory methods in Collator to obtain a Comparator for a specific locale, or use java. Parameters: update - whether or not to update the selection on sorting Since: 1. The mechanism for distributing the delta amongst the available columns is provided in a private method in the JTable class: adjustSizes long targetSize, final Resizable3 r, boolean inverse an explanation of which is provided in the following section.