Read text file and display it in Jtable? - text

Question

i need to read the contents of text file, line by line and display it on the Jtable, the table should be editable by users as needed, Any help Appreciated. I am new to Java. Thank You.
My Text File: File Name(people.txt)
COLUMN_NAME COLUMN_TYPE IS_NULLABLE COLUMN_KEY COLUMN_DEFAULT EXTRA
Names VARCHAR(500) NO
Address VARCHAR(500) NO
My Code So Far:
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.Vector;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
public class readtext {
static public void main(String[] arg){
JScrollPane scroll;
JTable table;
DefaultTableModel model;
String fname="people";
try
{
FileInputStream fstream = new FileInputStream("D:/joy/text/"+fname+".txt");
BufferedReader br = new BufferedReader(new InputStreamReader(fstream));
String strLine,str = null;
//Read File Line By Line
String text = "";
Vector myVector = new Vector();
while ((strLine = br.readLine()) != null) //loop through each line
{
myVector.add(strLine );
// Print the content on the console
text +=(strLine+"\n"); // Store the text file in the string
}
in.close();//Close the input stream
int i=0;
String fline=myVector.elementAt(0).toString();
String[] sp=fline.split("\\s+");
for(String spt:sp){
System.out.println(spt);
//model = new DefaultTableModel(spt, ); // I dont know how to put the strings
into Jtable here
table = new JTable(){
public boolean isCellEditable(int row, int column){
return false;
}
};
int a=0;// for text box name
for(i=1;i<myVector.size();i++){
str=myVector.elementAt(i).toString();
String[] res =str.split("\\s+");
int k=0;
for(String st:res)
System.out.println(st);
k++;a++; }
} }
catch(Exception e)
{
e.printStackTrace();
}
}
}
Thank You.

Answer 1

File Content: (Each attribute is separated by a semicolon and each line is a record.)
Hello1;123
World1;234
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
public class FileToJTable {
public static void main(String[] args) {
Runnable r = new Runnable() {
public void run() {
new FileToJTable().createUI();
}
};
EventQueue.invokeLater(r);
}
private void createUI() {
try {
JFrame frame = new JFrame();
frame.setLayout(new BorderLayout());
JTable table = new JTable();
String readLine = null;
StudentTableModel tableModel = new StudentTableModel();
File file = new File(""/*Give your File Path here*/);
FileReader reader = new FileReader(file);
BufferedReader bufReader = new BufferedReader(reader);
List<Student> studentList = new ArrayList<Student>();
while((readLine = bufReader.readLine()) != null) {
String[] splitData = readLine.split(";");
Student student = new Student();
student.setName(splitData[0]);
student.setNumber(splitData[1]);
studentList.add(student);
}
tableModel.setList(studentList);
table.setModel(tableModel);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new JScrollPane(table));
frame.setTitle("File to JTable");
frame.pack();
frame.setVisible(true);
} catch(IOException ex) {}
}
class Student {
private String name;
private String number;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getNumber() {
return number;
}
public void setNumber(String number) {
this.number = number;
}
}
class StudentTableModel extends AbstractTableModel {
private List<Student> list = new ArrayList<Student>();
private String[] columnNames = {"Name", "Number"};
public void setList(List<Student> list) {
this.list = list;
fireTableDataChanged();
}
#Override
public String getColumnName(int column) {
return columnNames[column];
}
public int getRowCount() {
return list.size();
}
public int getColumnCount() {
return columnNames.length;
}
public Object getValueAt(int rowIndex, int columnIndex) {
switch (columnIndex) {
case 0:
return list.get(rowIndex).getName();
case 1:
return list.get(rowIndex).getNumber();
default:
return null;
}
}
}
}

Answer 2

Well i didnt read ur code...however i'm telling u one of the simplest way of doing this...hope this helps
Define a DefaultTableModel:
String columns[] = { //Column Names// };
JTable contactTable = new JTable();
DefaultTableModel tableModel;
// specify number of columns
tableModel = new DefaultTableModel(0,2);
tableModel.setColumnIdentifiers(columns);
contactTable.setModel(tableModel);
Reading from text file:
String line;
BufferedReader reader;
try{
reader = new BufferedReader(new FileReader(file));
while((line = reader.readLine()) != null)
{
tableModel.addRow(line.split(", "));
}
reader.close();
}
catch(IOException e){
JOptionPane.showMessageDialog(null, "Error");
e.printStackTrace();
}
Also, if you want to allow users to edit the data, then you need to set a TableCellEditor on the cells that you want people to edit. You probably also want to start using a TableModel instead of hard coding the data in the JTable itself.
See http://docs.oracle.com/javase/tutorial/uiswing/components/table.html