13.b. Table.txt

b) Suppose that a table named Table.txt is stored in a text file. The first line in the file is the header, and the remaining lines correspond to rows in the table. The elements are separated by commas. Write a java program to display the table using Jtable component.

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import java.util.*;

import java.io.*;

public class Table1 extends JFrame

{

int i=0;

int j=0,k=0;

Object data[][]=new Object[5][4];

Object list[][]=new Object[5][4];

JButton save;

JTable table1;

FileInputStream fis;

DataInputStream dis;

public Table1()

{

String d= " ";

Container con=getContentPane();

con.setLayout(new BorderLayout());

final String[] colHeads={"Name","Roll Number","Department","Percentage"};

try

{

String s=JOptionPane.showInputDialog("Enter the File name present in the current directory");

FileInputStream fis=new FileInputStream(s);

DataInputStream dis = new DataInputStream(fis);

while ((d=dis.readLine())!=null)

{

StringTokenizer st1=new StringTokenizer(d,",");

while (st1.hasMoreTokens())

{

for (j=0;j<4;j++)

{

data[i][j]=st1.nextToken();

System.out.println(data[i][j]);

}

i++;

}

System.out.println("______________");

}

}

catch (Exception e)

{

System.out.println("Eception raised" +e.toString());

}

table1=new JTable(data,colHeads);

int v=ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED;

int h=ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED;

JScrollPane scroll=new JScrollPane(table1,v,h);

con.add(scroll,BorderLayout.CENTER);

}

public static void main(String args[])

{

Table1 t=new Table1();

t.setBackground(Color.green);

t.setTitle("Display Data");

t.setSize(500,300);

t.setVisible(true);

t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

}