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. This arranges data in a tabular form.
Constructors in JTable:
- JTable(): A table is created with empty cells.
- JTable(int rows, int cols): Creates a table of size rows * cols.
- JTable(Object[][] data, Object []Column): A table is created with the specified name where []Column defines the column names.
Functions in JTable:
- addColumn(TableColumn []column) : adds a column at the end of the JTable.
- clearSelection() : Selects all the selected rows and columns.
- editCellAt(int row, int col) : edits the intersecting cell of the column number col and row number row programmatically, if the given indices are valid and the corresponding cell is editable.
- setValueAt(Object value, int row, int col) : Sets the cell value as ‘value’ for the position row, col in the JTable.
Below is the program to illustrate the various methods of JTable:
Java
// Packages to importimport javax.swing.JFrame;import javax.swing.JScrollPane;import javax.swing.JTable;public class JTableExamples { // frame JFrame f; // Table JTable j; // Constructor JTableExamples() { // Frame initialization f = new JFrame(); // Frame Title f.setTitle("JTable Example"); // Data to be displayed in the JTable String[][] data = { { "Kundan Kumar Jha", "4031", "CSE" }, { "Anand Jha", "6014", "IT" } }; // Column Names String[] columnNames = { "Name", "Roll Number", "Department" }; // Initializing the JTable j = new JTable(data, columnNames); j.setBounds(30, 40, 200, 300); // adding it to JScrollPane JScrollPane sp = new JScrollPane(j); f.add(sp); // Frame Size f.setSize(500, 200); // Frame Visible = true f.setVisible(true); } // Driver method public static void main(String[] args) { new JTableExamples(); }} |
Output:
