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Getting the Number of Rows and Columns in JTable

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In this java tutorial you will learn how to get the number of rows and columns in JTable.

Getting the Number of Rows and Columns in JTable 

     

In this java tutorial you will learn how to get the number of rows and columns in JTable. 

This program simply helps us for getting the number of rows and columns from the JTable by using the some java methods. For this, you must have to create a table with some data in the table. Here the table appears on the frame as a graphical format and you get the number of rows and column to its name (Column name) in the command line with appropriate messages.

Description of code:

getColumnCount():
Above method is used for getting the number of columns in the column model that returns integer type values.

getRowCount():
This method returns integer types value that is number of rows in the model of table.

Here is the code of program:

import javax.swing.*;
import javax.swing.table.*;

public class GetRowsAndCols{
  public static void main(String[] args) {
  new GetRowsAndCols();
  }
  public GetRowsAndCols(){
  JFrame frame = new JFrame("Getting Rows and Columns from a Table!");
  JPanel panel = new JPanel();
  String data[][] {{"Vinod","5000","Java"},{"Deepak","14000","developer"},
{
"Sushil","20000","writter"},{"Chandan","15000","Programmer"}};
  String col[] {"Emp_name","Emp_sal","Depart"};
  JTable table = new JTable(data,col);
  int ncol = table.getColumnCount();
  System.out.println("Number of Columns: "+ ncol);
  System.out.println("Number of Rows: "+ table.getRowCount());
  System.out.println("Name of column:");
  for (int i = 0; i < ncol; i++){
  System.out.println(col[i]);
  }
  panel.add(table);
  frame.add(panel);
  frame.setSize(300,300);
  frame.setVisible(true);
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }
}

Download this example.

Output of program:

 

C:\vinod\Jtable>javac GetRowsAndCols.java

C:\vinod\Jtable>java GetRowsAndCols
Number of Columns: 3
Number of Rows: 4
Name of column:
Emp_name
Emp_sal
Depart
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Posted on: April 14, 2007

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Comments
Shubham Sahu
November 1, 2012
java swing

wow sir it is very fantastic site of knowledge the Perfect book..............................
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