Default TableModel Example Program (Java)

Default TableModel,Java Code

Default TableModel,The Java code underneath is a easy program used to reveal the one of a kind techniques of a DefaultTableModel in motion.

The first JTable created makes use of a two-dimensional object array to populate the row records and a String array to populate the column names. The program shows that despite the fact that you can get to the TableModel interface of the desk model to get and set values for person desk cells created for this JTable , you cannot get to the DefaultTableModel so that you can manipulate the records any in addition.

The 2nd JTable is created by using defining a DefaultTableModel with the statistics first. This lets in the overall variety of actions by means of the desk version to be carried out at the JTable (e.G, adding a row, putting a row, removing a row, including a column, and so on.).

You may also be interested in the AbstractTableModel class. This class lets in you to create a custom desk model for a JTable wherein you can keep the facts in besides you want. It does now not need to be in a Vector of Vectors.

Note: See DefaultTableModel Overview for some extra statistics.

import java.awt.BorderLayout; import java.awt.EventQueue; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.table.TableModel; import javax.swing.table.DefaultTableModel; public class TableExample { public static void main(String[] args) { //Use the event dispatch thread for Swing components EventQueue.invokeLater(new Runnable() { @Override public void run() { new TableExample().BuildGUI(); } }); } public void BuildGUI() { JFrame guiFrame = new JFrame(); //make sure the program exits when the frame closes guiFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); guiFrame.setTitle(“Creating a Table Example”); guiFrame.setSize(700,860); //This will center the JFrame in the middle of the screen guiFrame.setLocationRelativeTo(null); //Create a two dimensional array to hold the data for the JTable. Object[][] data = {{1,1,1},{2,2,2},{3,3,3},{4,4,4}}; //A string array containing the column names for the JTable. String[] columnNames = {“Column 1″,”Column 2″,”Column 3”}; //Create the JTable using the data array and column name array. JTable exampleJTable = new JTable(data, columnNames); //Create a JScrollPane to contain for the JTable JScrollPane sp = new JScrollPane(exampleJTable); //The JTable will provides methods which access the DefaultTabelModel. //created when the JTable object was created System.out.println(exampleJTable.getValueAt(2, 2)); //The DefaultTableModel can be acessed through the getModel method. TableModel tabModel = exampleJTable.getModel(); //Provides the same output as the exampleJTable.getValueAt method call //above. System.out.println(tabModel.getValueAt(2, 2).toString()); //Note: We can’t cast the TableMode returned from the getModel method //to a DefaultTableModel object because it is implemented as an anonymous //inner class in the JTable. So let’s create a JTable with a DefaultTableModel //we can use: //Create a DeafultTableModel object for another JTable DefaultTableModel defTableModel = new DefaultTableModel(data,columnNames); JTable anotherJTable = new JTable(defTableModel); //Create a JScrollPane to contain for the JTable JScrollPane anotherSP = new JScrollPane(anotherJTable); //an array holding data for a new column Object[] newData = {1,2,3,4}; //Add a column defTableModel.addColumn(“Column 4”, newData); //an array holding data for a new row Object[] newRowData = {5,5,5,5}; //Add a row defTableModel.addRow(newRowData); //an array holding data for a new row Object[] insertRowData = {2.5,2.5,2.5,2.5}; //Insert a row defTableModel.insertRow(2,insertRowData); //Change a cell value defTableModel.setValueAt(8888, 3, 2); //Add the JScrollPanes to the JFrame. guiFrame.add(sp, BorderLayout.NORTH); guiFrame.add(anotherSP, BorderLayout.SOUTH); guiFrame.setVisible(true); } }