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Feb 11th, 2010, 11:29 AM
#1
Thread Starter
New Member
How to display ArrayList on new line
Hi Guys,
I have the following bit of code
Code:
package Final;
import java.awt.event.*;
import java.util.ArrayList;
import javax.swing.*;
// Hieronder staan de verschillende tekstvakken, buttons en arraylists die ik gebruik.
class Paneel2 extends JPanel
{
private JTextField tekstvak1;
private JTextField tekstvak2;
private JTextArea uitvoerA;
private JTextArea uitvoerB;
private JButton toernooiButton;
private JButton weergaveButton;
private Badminton[] ArrayShuttle;
private int count = 0;
public Paneel2 ()
{
// Hieronder staan de textarea's, buttons en texfields gedefineerd
JLabel toernooiplek = new JLabel("Toernooi plek: ");
tekstvak1 = new JTextField(20);
JPanel plekPanel = new JPanel();
plekPanel.add(toernooiplek);
plekPanel.add(tekstvak1);
JLabel toernooinaam = new JLabel ("Toernooi naam: ");
tekstvak2 = new JTextField(20);
JPanel tekstPanel = new JPanel();
tekstPanel.add(toernooinaam);
tekstPanel.add(tekstvak2);
uitvoerA = new JTextArea(10,10);
tekstPanel.add(uitvoerA);
uitvoerA.setOpaque(false);
uitvoerA.setEditable(false);
toernooiButton = new JButton ("Voeg toernooi toe");
toernooiButton.addActionListener( new KnopHandler() );
weergaveButton = new JButton (" Geef Toernooien weer");
weergaveButton.addActionListener(new KnopHandler2());
uitvoerB = new JTextArea(10,10);
plekPanel.add(uitvoerB);
uitvoerB.setOpaque(false);
uitvoerB.setEditable(false);
ArrayShuttle = new Badminton[20];
// manier van actionlisteners toevoegen zonder ze nader te definieren
add(tekstPanel);
add(plekPanel);
add(weergaveButton);
add(toernooiButton);
// voor alle knoppen heb ik if - else gebruikt.
}
class KnopHandler implements ActionListener
{
public void actionPerformed(ActionEvent a)
{
String setPlek = tekstvak1.getText();
String setToernooi = tekstvak2.getText();
ArrayShuttle[count] = new Badminton(setPlek, setToernooi);
count++;
tekstvak1.setText("");
tekstvak2.setText("");
JOptionPane.showMessageDialog(null, "Toernooi Toegevoegd");
}
}
class KnopHandler2 implements ActionListener
{
public void actionPerformed(ActionEvent a)
{
for (int i = 0; i<ArrayShuttle.length;i++)
{
uitvoerA.setText(ArrayShuttle[i].getPlek()+ "\n");
uitvoerB.setText(ArrayShuttle[i].getToernooi() + "\n");
}
}
}
}
This is the piece of code is important
Code:
class KnopHandler2 implements ActionListener
{
public void actionPerformed(ActionEvent a)
{
for (int i = 0; i<ArrayShuttle.length;i++)
{
uitvoerA.setText(ArrayShuttle[i].getPlek()+ "\n");
uitvoerB.setText(ArrayShuttle[i].getToernooi() + "\n");
}
}
}
If i run the program, it overwrites the same line everytime.
How do i display the line below the other etc etc.
Thanks guys,
Tom
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Feb 11th, 2010, 05:19 PM
#2
Re: How to display ArrayList on new line
You want to use append instead of setText on your JTextArea.
http://java.sun.com/j2se/1.4.2/docs/...JTextArea.html
setText will replace what is in there with the whatever you're setting it to.
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Feb 11th, 2010, 06:34 PM
#3
Thread Starter
New Member
Re: How to display ArrayList on new line
thanks kfcSmitty,
The only problem now is, if i show to array it will give me all the entries.
But if i add another entry and press show again it will just put them below the previous ones. So you have duplicates.
Are there any simple solutions for this issue ( i'm looking at it my self atm )
Tom
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Feb 12th, 2010, 05:55 AM
#4
Re: How to display ArrayList on new line
You can add a flag for when entries change then setText to ""
"I'm not normally a praying man, but if you're up there, save me... Superman!" - Homer Simpson
My Blog
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Feb 12th, 2010, 06:11 AM
#5
Thread Starter
New Member
Re: How to display ArrayList on new line
i figured it out , and it worked.
I indeed used the setText("")
Thanks for the help again
Tom
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