Πρόβλημα με Java Loop

[sarakinos]

Στον παρακάτω κώδικα προσπαθώ να πάρω έναν πίνακα JTable και να τον αποθηκεύσω σε ένα file.

Το θέμα μου είναι ότι τρέχει μέχρι και την 3η στήλη του πίνακα , ενώ αυτός έχει 4.

 

 

 

 

>


import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;

public class windowOptions extends JFrame implements ActionListener {

DefaultTableModel model = new DefaultTableModel();
public JTable prosopiko = new JTable(model);

public windowOptions(){
//Initialize window
setTitle("Options");
setSize(300,300);
setVisible(true); 

//Initialize model for table
model.addColumn("Onoma");
model.addColumn("Epitheto");
model.addColumn("Thesi");
model.addColumn("Merokamata");

//Create Swing Components
JPanel panelOptions = new JPanel(new FlowLayout());
JButton addB = new JButton("Add"); 
JButton okB = new JButton("Ok");
JScrollPane scrollPane = new JScrollPane(prosopiko);

//Add actionListeners 
addB.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
model.addRow(new Object[]{"","","",""});

}
});

okB.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent arg0) {
try{
FileWriter fstream = new FileWriter("prosopiko.txt");
BufferedWriter out = new BufferedWriter(fstream);

TableModel tempModel = prosopiko.getModel();
JOptionPane.showMessageDialog(null, tempModel.getColumnCount());
for(int i=1 ; i<=tempModel.getRowCount() ; i++){
for(int j=1 ; j+1<=tempModel.getColumnCount() ; j++){
out.write(tempModel.getValueAt(i, j).toString());
System.out.print("i:"+i+"\nj:"+j+"\n");
}

}
out.close(); 

}catch(Exception e){

}


}});

panelOptions.add(scrollPane);
panelOptions.add(addB);
panelOptions.add(okB);

add(panelOptions);
pack();
}

}

[warlock9_0]

η getrowcount πόσες σου δίνει? εκεί είναι το θέμα, ανάλογα πως μετράει πρέπει να ξεκινήσεις το i από 0 ή 1

[karabouzouk...]

Σου διαβάζει μέχρι την τρίτη ή από τη δεύτερη και μέχρι την τέταρτη..??

 

Στον κώδικα εδώ μπορείς να μου εξηγήσεις γιατί ξεκινάς τα i και j από το 1 και όχι από το 0..? και δεύτερον γιατί στο j έχεις βάλει j+1<tempModel.getColumnCount() ?

 

>
for(int i=1 ; i<=tempModel.getRowCount() ; i++){
for(int j=1 ; j+1<=tempModel.getColumnCount() ; j++){

 

νομίζω το σωστό θα ήταν:

>
for(int i=0 ; i<tempModel.getRowCount() ; i++){
for(int j=0 ; j<tempModel.getColumnCount() ; j++){

[sarakinos]

Παιδιά θα σκάσω , έκανα print το exception και μου βγάζει out of bounds error...

2 Μέρες τώρα παιδεύομαι με αυτό...

 

>
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
public class windowOptions extends JFrame implements ActionListener {
DefaultTableModel model = new DefaultTableModel();
public JTable prosopiko = new JTable(model);

public windowOptions(){
 //Initialize window
 setTitle("Options");
 setSize(300,300);
 setVisible(true); 

 //Initialize model for table
 model.addColumn("Onoma");
 model.addColumn("Epitheto");
 model.addColumn("Thesi");
 model.addColumn("Merokamata");


 //Create Swing Components
 JPanel panelOptions = new JPanel(new FlowLayout());
 JButton addB = new JButton("Add");
 JButton okB = new JButton("Ok");
 JScrollPane scrollPane = new JScrollPane(prosopiko);

 //Add actionListeners
 addB.addActionListener(new ActionListener() {
 
  @Override
  public void actionPerformed(ActionEvent e) {
   model.addRow(new Object[]{"","","",""});
  
  
  }
 });

 okB.addActionListener(new ActionListener() {
 
  @Override
  public void actionPerformed(ActionEvent arg0) {
   try{

   FileWriter fstream = new FileWriter("prosopiko.txt");
   BufferedWriter out = new BufferedWriter(fstream);

   TableModel tempModel = prosopiko.getModel();
   int rows = tempModel.getRowCount();
   int cols = tempModel.getColumnCount();
   prosopiko.setModel(model);
   for(int i=1 ; i<=rows ; i++){
 for(int j=1 ;j<=cols ; j++){
  System.out.println(model.getValueAt(i, j));
 
 }

   }
  out.close();
 
  }catch(Exception e){
   e.printStackTrace();
  }
 
 
 }});

 panelOptions.add(scrollPane);
 panelOptions.add(addB);
 panelOptions.add(okB);

 add(panelOptions);
 pack();

}
@Override
public void actionPerformed(ActionEvent arg0) {
 // TODO Auto-generated method stub

}


}

 

Console

 

>
123213123
123123
java.lang.ArrayIndexOutOfBoundsException: 4 >= 4
at java.util.Vector.elementAt(Unknown Source)
at javax.swing.table.DefaultTableModel.getValueAt(Unknown Source)
at windowOptions$2.actionPerformed(windowOptions.java:86)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

[warlock9_0]

το έκανες αυτό που σου είπα?

 

>for(int i=0 ; i<rows ; i++){
for(int j=0 ;j<cols ; j++){
System.out.println(model.getValueAt(i, j));

 

η πρώτη στήλη δεν είναι η 1 αλλά η 0

[sarakinos]

Το ίδιο πράγμα , έχω πρόβλημα ακόμα και αν βάλω σταθερές τιμές στην getValueAt

[T3rror1st]

αντικατέστησε τον listener του okB με αυτό

okB.addActionListener(new ActionListener() {

 

@Override

public void actionPerformed(ActionEvent arg0) {

try{

 

FileWriter fstream = new FileWriter("prosopiko.txt");

BufferedWriter out = new BufferedWriter(fstream);

 

 

prosopiko.setModel(model);

out.write("onoma \t epitheto \t thesi \t merokamata" );

out.newLine();

for(int i=0 ; i < model.getRowCount() ; i++){

for(int j=0 ;j < model.getColumnCount() ; j++){

System.out.println(model.getValueAt(i, j));

out.write(model.getValueAt(i, j).toString()+"\t");

}

out.newLine();

}

out.close();

 

}catch(Exception e){

e.printStackTrace();

}

 

 

}});