Jtable java

The JTable class is a part of Java Swing Package jtable java is generally used to display or edit two-dimensional data that is having both rows and columns. It is similar to a spreadsheet. This arranges data in a tabular form. Constructors in JTable :, 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. For example: setAutoCreateRowSorter true.

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. The display will be more like a database table display of rows and columns. In this case, the id,name, hourly rate are the columns. The number of rows might differ based on the number of employees in the organization. First Attempt:.

You can add a tool tip to a column header by setting the tool tip text tt nails the table's JTableHeader. The same way, the third column 'hourly rate' would display decimal values and so the type is declared as Double. A good rule of thumb for deciding whether to use the AbstractTableModel or the DefaultTableModel is to use the AbstractTableModel as the base class for creating subclasses and the DefaultTableModel when jtable java is not required, 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:.

CodeGym University. Light theme. Published in the Java Developer group. If you're looking to display data in a tabular format, you should consider using the JTable class in the javax. The JTable class is a versatile tool that allows you to create a table with rows and columns and customize it according to your needs.

Jtable java

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. A column is space that runs horizontally on a table, while a row is a space that runs horizontally in your table. The intersection between a column and a row is called a cell and is used to hold singular piece of data. In Java, developers can use the JTable method to create a table in their applications. JTable is a Swing component that inherits from the JComponent class. To create a table, you need to make an instance of the JTable class. You need to provide two arguments row and column in its constructor for the table to be constructed, as shown in this example code snippet:.

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Parameters: aValue - the new value row - the row of the cell to be changed column - the column of the cell to be changed See Also: getValueAt int, int isCellEditable public boolean isCellEditable int row, int column Returns true if the cell at row and column is editable. This dialog also prevents any user action which may affect the table. Otherwise, invoking setValueAt on the cell will have no effect. You may even request that different pages be rendered into different sized printable areas. This method is meant for those wishing to customize the default Printable implementation used by JTable 's print methods. PrinterException , which is a checked exception ; that's why the above example uses a try The error checking is a side effect of converting the entered text into an object of the proper type. Sets the height for row to rowHeight , revalidates, and repaints. In the screenshot below, a user has run the program, clicked in the first row, then control-clicked in the third row. This is needed as we are overriding 2 methods:. Now you can only select one row at a time. The default is true. Parameters: columnClass - return the default cell renderer for this columnClass Returns: the renderer for this columnClass See Also: setDefaultRenderer java.

This article shows a simple example of JTable. This is similar to a spreadsheet. Let us consider some examples.

In the screenshot below, a user has run the program, clicked in the first row, then control-clicked in the third row. The precedence of the columns in the sort is indicated by the order of the sort keys in the sort key list. The return value indicates whether the user went ahead with the print job or cancelled it. As far as customizing further how the table looks in the printout, developers can provide custom renderers or paint code that conditionalize on the value of JComponent. Returns: true if columns can be selected, otherwise false See Also: setColumnSelectionAllowed boolean setCellSelectionEnabled public void setCellSelectionEnabled boolean cellSelectionEnabled Sets whether this table allows both a column selection and a row selection to exist simultaneously. In other words, the value of the cell at row 1, column 5 can be obtained with the following code: Vector rowData. Parameters: index0 - one end of the interval index1 - the other end of the interval Throws: IllegalArgumentException - if index0 or index1 lie outside [0, getColumnCount -1] getSelectedRow public int getSelectedRow Returns the index of the first selected row, -1 if no row is selected. If nothing is being edited, returns null. Generally, you begin editing a text cell by double-clicking it. First of all, the column headers are identified and declared in a String array columns. Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available. This code snippet first extends the DefaultTableModel class to create an anonymous instance. In a subsequent example, newFilter is invoked every time the text field changes. Get paid for your published articles and stand a chance to win tablet, smartwatch and exclusive GfG goodies!