JPanel leftPanel = new JPanel();
JPanel leftTopPanel = new JPanel();
JPanel leftDownPanel = new JPanel();
JTextArea textArea = new JTextArea();
textArea.setBackground(Color.red);
textArea.setText("DESCRIPTION");
textArea.setEnabled(false);
leftPanel.setLayout( new GridLayout(2,1));
JScrollPane scrollPane = new JScrollPane(textArea);
scrollPane.setVerticalScrollBarPolicy(VERTICAL_SCROLLBAR_ALWAYS);
scrollPane.setHorizontalScrollBarPolicy(HORIZONTAL_SCROLLBAR_NEVER);
scrollPane.setPreferredSize( new Dimension(10,10));
leftPanel.add(leftTopPanel);
leftPanel.add(scrollPane);
return leftPanel;
Hi everyone. I am trying to make a textArea which basially will get description from database.
Here is the problem. When I write the real description in to TextArea, It always shows me the Description in one line. How can I fix it ?
THANKS :)
Related
Why when I add JTextArea to JPanel it doesn't work? When I use JButton instead of JTextArea everything works corectly. Why doesn't JTextArea work with JPanel but with JFrame does?
public class Searching extends JPanel {
private JPanel searchPanel;
private JTextArea addMedicament;
public Searching(){
searchPanel = new JPanel();
searchPanel.setLayout(new GridLayout(1,1));
setBackground(Color.BLUE);
addMedicament = new JTextArea();
searchPanel.add(addMedicament);
this.add(searchPanel);
}
}
A text area will work fine with a panel.
Try creating the text area as follows:
JTextArea textArea = new JTextArea(5, 20);
JScrollPane = new JScrollPane( textArea );
panel.add( scrollPane );
Now the text area will be created with a preferred size. As the data is changed scrollbars will appear/disappear as required because the problem is with your code and the context of how you use your code, not the panel or text area.
If this doesn't help then post a proper SSCCE that demonstrates the problem.
public UserInterface(){
super(new BorderLayout());
fc = new JFileChooser();
setComponents();
}
public void setComponents(){
//top section
openButton = new JButton("Charger fichier");
openButton.addActionListener(this);
JPanel buttonPanel = new JPanel();
buttonPanel.add(openButton);
//left section
//class panel
JPanel classe = new JPanel();
classes = new JTextArea(25,15);
classes.setMargin(new Insets(5,5,5,5));
classes.setEditable(false);
JScrollPane classeScrollPane = new JScrollPane(classes);
classe.setBorder(new TitledBorder("Classes"));
classe.add(classeScrollPane);
//right section
JPanel right = new JPanel(new BorderLayout());
JPanel right_top = new JPanel(new GridLayout(2,2));
//attribut panel
JPanel attribut = new JPanel();
attributs = new JTextArea(8,19);
attributs.setMargin(new Insets(5,5,5,5));
attributs.setEditable(false);
JScrollPane attributScrollPane = new JScrollPane(attributs);
attribut.setBorder(new TitledBorder("Attributs"));
attribut.add(attributScrollPane);
//function panel
JPanel methode = new JPanel();
methodes = new JTextArea(8,19);
methodes.setMargin(new Insets(5,5,5,5));
methodes.setEditable(false);
JScrollPane methodeScrollPane = new JScrollPane(methodes);
methode.setBorder(new TitledBorder("Methodes"));
methode.add(methodeScrollPane);
//subclass panel
JPanel sousclasse = new JPanel();
sousclasses = new JTextArea(8,19);
methodes.setMargin(new Insets(5,5,5,5));
methodes.setEditable(false);
JScrollPane sousclasseScrollPane = new JScrollPane(sousclasses);
sousclasse.setBorder(new TitledBorder("Sous-classes"));
sousclasse.add(sousclasseScrollPane);
//relation panel
JPanel relation = new JPanel();
relations = new JTextArea(8,19);
relations.setMargin(new Insets(5,5,5,5));
relations.setEditable(false);
JScrollPane relationScrollPane = new JScrollPane(relations);
relation.setBorder(new TitledBorder("Relations"));
relation.add(relationScrollPane);
right_top.add(attribut);
right_top.add(methode);
right_top.add(sousclasse);
right_top.add(relation);
//detail panel
JPanel detail = new JPanel();
details = new JTextArea(5,40);
details.setMargin(new Insets(5,5,5,5));
details.setEditable(false);
JScrollPane detailScrollPane = new JScrollPane(details);
detail.setBorder(new TitledBorder("Détails"));
detail.add(detailScrollPane);
right.add(right_top,BorderLayout.CENTER);
right.add(detail,BorderLayout.SOUTH);
add(buttonPanel, BorderLayout.NORTH);
add(classe, BorderLayout.WEST);
add(right, BorderLayout.CENTER);
}
the layout created from code above is:
You can see the text area of 'sousclass' panel is smaller than other JTextArea with the same parameters(8,19). Could anyone tell me why?
Also, assume that i have some data, I'd like to display class name in class section, once i click one of classes, it displays attributs of that class in the attribut section, how could i realize this function？ Thanks。
JPanel sousclasse = new JPanel();
sousclasses = new JTextArea(8,19);
methodes.setMargin(new Insets(5,5,5,5)); // wrong variable
methodes.setEditable(false); // wrong variable
You didn't set the margin on the text area. You are using the wrong variable name.
i'm trying to make nested tabs in java . It works but how can i resize my nested tabs ? ( addStudent, addTeacher ) because when it runs, they are very narrow. Thx for help
JPanel students = new JPanel();
JPanel teachers = new JPanel();
JPanel lessons = new JPanel();
JPanel courses = new JPanel();
JPanel addPanel = new JPanel();
JPanel translations = new JPanel();
JPanel addStudent = new JPanel();
JPanel addTeacher = new JPanel();
JButton bAddStudent = new JButton();
//addStudent.setBounds(x, y, width, height);
tp=new JTabbedPane();
tp2 = new JTabbedPane();
Container pane = this.getContentPane();
pane.add(tp);
tp.addTab("Uczniowie",students);
tp.addTab("Nauczyciele",teachers);
tp.addTab("Harmonogram zajec",lessons);
tp.addTab("Kursy",courses);
tp.addTab("Tlumaczenia", translations);
tp.addTab("Panel administratora", addPanel);
tp2.add("Nowy uczen",addStudent);
tp2.add("Nowy nauczyciel",addTeacher);
addPanel.add(tp2);
Change the layout manager of addPanel to a BorderLayout
This will allow tp2 to occupy the entire available space provided by addPanel and tp
I'd also be careful with nested tabs, it becomes very messy and confusing to user very quickly
I'm trying to create (hand-coded) a GUI similair to the GUI shown below, however, only an empty frame shows.
Mock GUI:
I've used various layouts and SWING/AWT components to create the GUI and 4 JPanels which contain:
mainPanel: Contains all the panels in it.
listPanel: Contains the JTables, JLabels and the two JButtons
infoPanel: Contains the JLabels, JCheckBox and JTextBoxes.
addPanel: Contains the JLists and JButton
This is what I coded so far:
import java.awt.*;
import javax.swing.*;
import javax.swing.JTable;
public class GUI extends JFrame {
public void buildGui() {
JFrame frame = new JFrame("Hotel TV Scheduler");
JPanel mainPanel = new JPanel();
mainPanel.setLayout(new BorderLayout());
JPanel listPanel = new JPanel();
listPanel.setLayout(new GridLayout(3,3));
JPanel infoPanel = new JPanel();
infoPanel.setLayout(new GridLayout(2,2));
JPanel addPanel = new JPanel();
addPanel.setLayout(new FlowLayout());
mainPanel.add(listPanel, BorderLayout.LINE_START);
mainPanel.add(infoPanel, BorderLayout.LINE_END);
mainPanel.add(addPanel, BorderLayout.PAGE_END);
JTable chOneTable = new JTable();
JTable chTwoTable = new JTable();
JTable listTable = new JTable();
JLabel ch1Label = new JLabel("Channel 1");
JLabel ch2Label = new JLabel("Channel 2");
JLabel listLabel = new JLabel("List");
JButton rmvChOneButton = new JButton("Remove Channel");
JButton rmvChTwoButton = new JButton("Remove Channel");
listPanel.add(ch1Label);
listPanel.add(ch2Label);
listPanel.add(listLabel);
listPanel.add(chOneTable);
listPanel.add(chTwoTable);
listPanel.add(listTable);
listPanel.add(rmvChOneButton);
listPanel.add(rmvChTwoButton);
JLabel titleLabel = new JLabel("Title");
JLabel genreLabel = new JLabel("Genre");
JLabel durationLabel = new JLabel("Duration");
JLabel actorLabel = new JLabel("Actor");
JLabel directorLabel = new JLabel("Director");
JLabel rentableLabel = new JLabel("Rentable");
JLabel synLabel = new JLabel("Synopsis");
JTextField txtTitle = new JTextField();
JTextField txtGenre = new JTextField();
JTextField txtDuration = new JTextField();
JTextField txtActor = new JTextField();
JTextField txtDirector = new JTextField();
JTextField txtSynopsis = new JTextField();
JCheckBox rentCB = new JCheckBox();
infoPanel.add(titleLabel);
infoPanel.add(txtTitle);
infoPanel.add(genreLabel);
infoPanel.add(txtGenre);
infoPanel.add(durationLabel);
infoPanel.add(txtDuration);
infoPanel.add(actorLabel);
infoPanel.add(txtActor);
infoPanel.add(directorLabel);
infoPanel.add(txtDirector);
infoPanel.add(rentableLabel);
infoPanel.add(rentCB);
infoPanel.add(synLabel);
infoPanel.add(txtSynopsis);
JButton btnAddProg = new JButton("Add Program");
JList channelList = new JList();
JList timeList = new JList();
addPanel.add(btnAddProg);
addPanel.add(channelList);
addPanel.add(timeList);
frame.setVisible(true);
}
}
Anyone can tell me why only an empty frame is showing up ?
Thanks and Regards,
Brian
Yep just checked, you'll see something if you actually add the mainPanel to the frame, (looks nothing like the mock though!)
frame.setContentPane(mainPanel);
frame.pack();
You've not added mainPanel to the frame
new to java and brand new to the site. I have a JLabel added to the center panel of a BorderLayout. I would like the JLabel to be centered in the panel; setAlignmentX appears to work, but setAlignmentY does not (the label appears at the top of the panel). Here is the code:
centerPanel = new JPanel();
centerPanel.setLayout(new BoxLayout(centerPanel,BoxLayout.Y_AXIS));
JLabel label = new JLabel("This should be centered");
label.setAlignmentX(Component.CENTER_ALIGNMENT);
label.setAlignmentY(Component.CENTER_ALIGNMENT);
centerPanel.add(label);
contentPane.add(centerPanel, BorderLayout.CENTER);
I have also tried label.setVerticalAlignment(CENTER);, to no avail. I've looked for an answer in the API and in the Java Tutorials, on this site, and through a google search. Thanks!
You were close, try this:
public static void main(String[] args)
{
JFrame contentPane = new JFrame();
JPanel centerPanel = new JPanel();
centerPanel.setLayout(new BorderLayout());
JLabel label = new JLabel("This should be centered");
label.setHorizontalAlignment(SwingConstants.CENTER);
centerPanel.add(label, BorderLayout.CENTER);
contentPane.add(centerPanel, BorderLayout.CENTER);
contentPane.pack();
contentPane.setVisible(true);
}
One of the many joys of GUI programming in Java. I'd rather poke my eye out if I'm being honest.
I tried to vertically center align JButton but I had problem it was stretched. After fiddling I found this works:
JPanel jpTop = new JPanel(new BorderLayout());
jbStop = new JButton("Cancel");
JPanel extraPanel = new JPanel();
extraPanel.setLayout(new BoxLayout(extraPanel, BoxLayout.X_AXIS));
extraPanel.setAlignmentY(Component.CENTER_ALIGNMENT);
extraPanel.add(jbStop);
jpTop .add(extraPanel, BorderLayout.EAST);
Of course it works as well for JLabel.