Hi Sachith,
I hv done this Program for some networking purposes, but u can see
this program handling the files (JPingConf.txt, JPingLog.txt)
dynamically,
hope this will help you...
i hate this word wrap while sending a mail, program's readability
totally spoils :-(
regards,
S.Vasanth Kumar.
import java.awt.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import java.util.*;
import javax.swing.table.*;
import java.text.SimpleDateFormat;
public class JPing extends JFrame implements ActionListener,Runnable
{
JLabel jlblTitle = new JLabel("JPing v1.0", JLabel.CENTER);
JTable jtblIP;
Vector vContents = new Vector();
String strHeadings[] = {"DOMAIN","IP ADDRESS","PORT","LAST CHECK
TIME","STATUS"};
String STRING_HI = "JPing-Hi, This Message Will be sent to each &
every the Destination to check Connectivity!!";
JTextField jtfRegion = new JTextField(10);
JTextField jtfIP = new JTextField(15);
JTextField jtfPort = new JTextField(4);
JButton jbtnAdd = new JButton("Add");
JButton jbtnSave = new JButton("Save");
Container c = getContentPane();
GridBagLayout grid = new GridBagLayout();
GridBagConstraints gbc = new GridBagConstraints();
SimpleDateFormat sdfNormal = new SimpleDateFormat("dd/MM/yyyy
hh:mm:ss a");
Thread thrdRun;
boolean thrdFlag=true,initFlag=true;
String strConfFile = "JPingConf.txt";
String strLogFile = "JPingLog.txt";
int errX=0,errY=-30;
public JPing()
{
super("JPing v1.0");
setSize(725,500);
jtfPort.setText("23");
IPModel tmIPModel = new IPModel();
jtblIP = new JTable(tmIPModel);
jtblIP.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
jtblIP.setAutoResizeMode(JTable.AUTO_RESIZE_LAST_COLUMN);
jtblIP.setRowHeight(jtblIP.getRowHeight()+3);
buildTable();
doDataCollection();
thrdRun = new Thread(this);
thrdRun.start();
JPanel jpnlSouth = new JPanel(new FlowLayout(FlowLayout.CENTER));
jpnlSouth.add(new JLabel("Region: ",JLabel.RIGHT));
jpnlSouth.add(jtfRegion);
jpnlSouth.add(new JLabel("IP: ",JLabel.RIGHT));
jpnlSouth.add(jtfIP);
jpnlSouth.add(new JLabel("Port: ",JLabel.RIGHT));
jpnlSouth.add(jtfPort);
jpnlSouth.add(jbtnAdd);
jpnlSouth.add(jbtnSave);
jlblTitle.setFont(new Font("Dialog",Font.BOLD,20));
c.setLayout(grid);
gbc.fill = gbc.BOTH;
gbc.insets = new Insets(2,2,2,2);
addComponent(jlblTitle,0,0,2,1);
gbc.weightx=1;
gbc.weighty=1;
addComponent(new JScrollPane(jtblIP),1,0,1,1);
gbc.weightx=0;
gbc.weighty=0;
addComponent(jpnlSouth,2,0,1,1);
validate();
setVisible(true);
jbtnAdd.addActionListener(this);
jbtnSave.addActionListener(this);
jbtnAdd.setMnemonic('A');
jbtnSave.setMnemonic('S');
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent we)
{
try
{
thrdFlag = false;
doAppendLog("\r\nProgram Exited on " + sdfNormal.format(new Date
()));
dispose();
}
catch(Exception ex){}
finally
{
System.exit(0);
}
}
});
jtblIP.addKeyListener(new KeyAdapter()
{
public void keyPressed(KeyEvent ke)
{
if(ke.getKeyCode() == ke.VK_DELETE)
{
int row = jtblIP.getSelectedRow();
for(int i=0;i<jtblIP.getColumnCount();i++)
jtblIP.setValueAt("",row,i);
jtblIP.repaint();
}
}
});
try
{
doAppendLog("\r\nProgram Started on " + sdfNormal.format(new Date
()));
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(this,ex.toString
(),"Error",JOptionPane.ERROR_MESSAGE);
}
}
public void addComponent(Component ct,int y,int x,int width,int
height)
{
gbc.gridx=x;
gbc.gridy=y;
gbc.gridwidth=width;
gbc.gridheight=height;
grid.setConstraints(ct,gbc);
c.add(ct);
}
public void buildTable()
{
jtblIP.createDefaultColumnsFromModel();
StatusRenderer srRenderer = new StatusRenderer();
TableColumnModel tcm = jtblIP.getColumnModel();
tcm.getColumn(4).setCellRenderer(srRenderer);
tcm.getColumn(0).setPreferredWidth(100);
tcm.getColumn(1).setPreferredWidth(75);
tcm.getColumn(2).setPreferredWidth(50);
tcm.getColumn(3).setPreferredWidth(160);
tcm.getColumn(4).setPreferredWidth(200);
}
public void actionPerformed(ActionEvent ae)
{
if(ae.getSource() == jbtnAdd)
{
try
{
if(jtfRegion.getText().trim().equalsIgnoreCase(""))
JOptionPane.showMessageDialog(this,"Please enter a valid
Region...","Warning",JOptionPane.WARNING_MESSAGE);
else if(jtfIP.getText().trim().equalsIgnoreCase(""))
JOptionPane.showMessageDialog(this,"Please enter a valid
IP...","Warning",JOptionPane.WARNING_MESSAGE);
else if(Integer.parseInt(jtfPort.getText().trim())<0)
JOptionPane.showMessageDialog(this,"Please enter a valid
Port...","Warning",JOptionPane.WARNING_MESSAGE);
else
{
vContents.add(jtfRegion.getText().trim().toUpperCase());
vContents.add(jtfIP.getText().trim().toUpperCase());
vContents.add(jtfPort.getText().trim());
vContents.add("");
vContents.add("");
jtblIP.repaint();
jtblIP.revalidate();
jtfRegion.setText("");
jtfIP.setText("");
jtfPort.setText("23");
}
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(this,ex.toString
(),"Error",JOptionPane.ERROR_MESSAGE);
}
}
else if(ae.getSource() == jbtnSave)
{
try
{
StringBuffer sb = new StringBuffer();
for(int i=0;i<jtblIP.getRowCount();i++)
{
if(jtblIP.getValueAt(i,1).toString().trim().equalsIgnoreCase(""))
continue;
if(i>0)
sb.append("\r\n");
for(int j=0;j<jtblIP.getColumnCount();j++)
{
if(j>0)
sb.append("\t");
String strTemp = jtblIP.getValueAt(i,j).toString().trim();
if(strTemp.equalsIgnoreCase(""))
strTemp = "-";
sb.append(strTemp);
}
}
OutputStream out = new FileOutputStream(strConfFile);
out.write(sb.toString().trim().getBytes());
out.flush();
out.close();
doDataCollection();
JOptionPane.showMessageDialog(this,"Configuration Saved
Successfully", "Save", JOptionPane.INFORMATION_MESSAGE);
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(this,ex.toString
(),"Error",JOptionPane.ERROR_MESSAGE);
}
}
}
public void doDataCollection()
{
try
{
File f = new File(strConfFile);
if(!f.isFile())
f.createNewFile();
BufferedReader brReader = new BufferedReader(new FileReader
(strConfFile));
vContents.removeAllElements();
String strLine=null;
while((strLine = brReader.readLine())!=null)
{
StringTokenizer st = new StringTokenizer(strLine,"\t");
while(st.hasMoreTokens())
{
vContents.add(st.nextToken());
}
}
jtblIP.repaint();
jtblIP.revalidate();
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(this,ex.toString
(),"Error",JOptionPane.ERROR_MESSAGE);
}
}
public void run()
{
if(Thread.currentThread() == thrdRun)
{
while(thrdFlag)
{
int i=0;
for(i=0;i<jtblIP.getRowCount();i++)
{
if(jtblIP.getValueAt(i,1).toString().trim().equalsIgnoreCase(""))
continue;
boolean errShow = false;
if(jtblIP.getValueAt(i,4).toString().trim().equalsIgnoreCase
("Ok") || jtblIP.getValueAt(i,4).toString().trim().equalsIgnoreCase
("") || jtblIP.getValueAt(i,4).toString().trim().equalsIgnoreCase("-
"))
errShow = true;
boolean logAppend = false;
if(!jtblIP.getValueAt(i,4).toString().trim().equalsIgnoreCase
("Ok") && !jtblIP.getValueAt(i,4).toString().trim().equalsIgnoreCase
("") && !jtblIP.getValueAt(i,4).toString().trim().equalsIgnoreCase("-
"))
logAppend = true;
try
{
Socket s = new Socket(jtblIP.getValueAt(i,1).toString().trim
(),Integer.parseInt(jtblIP.getValueAt(i,2).toString().trim()));
OutputStream out = s.getOutputStream();
out.write(STRING_HI.getBytes());
out.flush();
out.close();
s.close();
jtblIP.setValueAt(sdfNormal.format(new Date()),i,3);
jtblIP.setValueAt("Ok",i,4);
if(logAppend)
{
doRowLog(i);
}
}
catch(Exception ex)
{
try
{
jtblIP.setValueAt(sdfNormal.format(new Date()),i,3);
jtblIP.setValueAt(ex.toString(),i,4);
if(errShow || initFlag)
{
initFlag = false;
doRowLog(i);
if(errY>=300)
{
errY = 0;
errX += 50;
}
else
{
errY += 30;
}
JFrame jfError = new JFrame(jtblIP.getValueAt(i,0).toString()
+ " - Problem");
jfError.setResizable(false);
jfError.setLocation(errX,errY);
JTextArea jtaError = new JTextArea(5,35);
jtaError.setLineWrap(true);
jtaError.setWrapStyleWord(true);
jtaError.setEditable(false);
jtaError.setText(jtblIP.getValueAt(i,0).toString() + " having
problem (" + ex.toString() + ")\r\nTime: " + jtblIP.getValueAt
(i,3).toString().trim() + "\r\nIP: " + jtblIP.getValueAt(i,1).toString
().trim() + ", Port: " + jtblIP.getValueAt(i,2).toString().trim());
jfError.getContentPane().add("Center",new JScrollPane
(jtaError));
jfError.validate();
jfError.pack();
jfError.show();
jfError.toFront();
}
}
catch(ArrayIndexOutOfBoundsException aioobEx){}
catch(Exception exIO)
{
JOptionPane.showMessageDialog(this,exIO.toString
(),"Error",JOptionPane.ERROR_MESSAGE);
}
}
finally
{
jtblIP.repaint();
}
}
try
{
thrdRun.sleep(30000);
}catch(Exception ex){}
}
}
}
public void doAppendLog(String str) throws IOException
{
OutputStream out = new FileOutputStream(strLogFile,true);
out.write(str.getBytes());
out.flush();
out.close();
}
public void doRowLog(int i) throws IOException
{
StringBuffer sb = new StringBuffer();
sb.append("\r\n");
for(int j=0;j<jtblIP.getColumnCount();j++)
{
if(j>0)
sb.append("\t");
String strTemp = jtblIP.getValueAt(i,j).toString().trim();
if(strTemp.equalsIgnoreCase(""))
strTemp = "-";
sb.append(strTemp);
}
doAppendLog(sb.toString());
}
public static void main(String args[])
{
new JPing();
}
class IPModel extends AbstractTableModel
{
public int getColumnCount()
{
return strHeadings.length;
}
public String getColumnName(int col)
{
return strHeadings[col];
}
public int getRowCount()
{
return vContents.size()/strHeadings.length;
}
public void setValueAt(Object value, int row, int col)
{
vContents.setElementAt(value,(row*strHeadings.length)+col);
}
public Object getValueAt(int row,int col)
{
return vContents.elementAt((row*strHeadings.length)+col);
}
public boolean isCellEditableAt(int row,int col)
{
return false;
}
}
class StatusRenderer extends DefaultTableCellRenderer
{
public void setValue(Object str)
{
super.setValue(str);
if(str.toString().trim().toUpperCase().equalsIgnoreCase("Ok"))
setBackground(Color.green.darker());
else
setBackground(Color.red.brighter());
}
public Font getFont()
{
return new Font("Dialog",Font.BOLD,14);
}
}
}
--- Sachith Dassanayake <[EMAIL PROTECTED]> wrote:
>
>
> Dear Vasanth Kumar,
>
> Thank you very much for your reply. You are correct.
> It was the
> mistake I have done. I have recieved 3 emails
> regarding to this.
>
> I want to display the records which are stored in
> the file in a
> table or a lJList. I tryed but I couldn't do it
> Dynamically.
> Can U help me On this.
> This I'm doing for my assignment and I have to
> sumbmit it on
> Friday.
> Sorry for troubling you.
>
> Thank you once again
> Regards
> Sachith
>
> Vasanth Kumar writes:
>
> >
> >
> > Hi Sachith,
> >
> > If you are using FileOutputStream to store your
> data,
> > you have to use the constructor as follows
> >
> > FileOutputStream("OutFile.txt", true)
> >
> > But if u are using FileOutputStream("OutFile.txt")
> the
> > default behavior will OVERWRITE ur file whenever u
> > call FileOutputStream.write() method.
> >
> > so pass "true" as second argument, means do you
> want
> > to append to the file ??? "YES"
> >
> > regards,
> > S.Vasanth Kumar.
> >
> > import java.io.*;
> > import java.util.Date;
> >
> > public class AppendDemo
> > {
> > public static void main(String args[])
> > {
> > try
> > {
> > OutputStream out = new
> > FileOutputStream("AppendLog.txt", true); // true
> here
> > is v.v.imp to append the future contents
> > out.write(("Program executed on: " + new Date()
> +
> > "\r\n").getBytes());
> > out.flush();
> > out.close();
> > }
> > catch(Exception ex)
> > {
> > System.out.println(ex.toString());
> > }
> > }
> > }
> >
> > --- Sachith Dassanayake <[EMAIL PROTECTED]>
> wrote:
> >>
> >>
> >> I 'm doing a simple program on file handling in
> >> JAVA.
> >> I need to store 3 data
> >>
> >> 1 First Name
> >> 2 Last Name
> >> 3 Phone Number
> >> in to a file. (Not
> a
> >> Database). I
> >> tryed to do it using
> >> datainputstreams etc.. But when i enter the
> second
> >> record it
> >> over writes the first record.
> >> How can i over ome this problem
> >>
> >> Also I hav to display all the records in a table
> >> after entering.
> >> It has to be worked even I close the program and
> >> reopen it.
> >>
> >> It would be greatful if any one can help me on my
> >> program.
> >>
> >> Thank you
> >> Sachith
> >> ---------------------------------------------
> >> Free POP3 Email from www.Gawab.com
> >> Sign up NOW and get your account @gawab.com!!
> >>
> >>
> >> [Non-text portions of this message have been
> >> removed]
> >>
> >>
> >>
> >>
> >>
> >
> >
>
______________________________________________________________________
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