The solution is to use a different JTextArea constructor, so change line 30 to textArea = new JTextArea(5, 10) If I maximize the screen, there are very much blank spaces. If I put text into one of the JTextAreas, the scrollbar doesn't work ![]() ![]() tVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS) ScrollPane3 = new JScrollPane(textArea3) ScrollPane2 = new JScrollPane(textArea2) GridBagConstraints c = new GridBagConstraints() JScrollPane scrollPane, scrollPane2, scrollPane3 JTextArea textArea, textArea2, textArea3 The JPanel will now resize to fit the frame rather than the textarea.īTW you were creating 2 frames, 2 textareas and 2 scrollpanes which I have also corrected. Panel.add(scrollPane, BorderLayout.PAGE_START) tLayout(new FlowLayout(FlowLayout.LEADING)) The trick is to use a JPanel as in intermediary between the textarea and the frame like this. The JTextArea will be resized to fill the JFrame even if you set the preferred and maximum size because you can't have 'empty space' in the JFrame when it bigger than the text area. What I want is to say that the JTextArea has to be 400px by 50px always, unregarded the size of the JFrame. If I'm running this code and maximize the JFrame, the JTextArea will become bigger (it fills the whole JFrame). My question is: How can I set the size of the JTextArea to a fixed value? When I run this code, Processing hides his own PApplet and creates a JFrame with a JTextArea in it. JScrollPane scrollPane = new JScrollPane() Uses a panel with a right-aligned FlowLayout presenting two buttons.I am searching on the web for a long time to get a JTextArea in my Processing sketch.īecause it isn't possible to get Java Swing or Java AWT into a PApplet, I tried to create a code which creates a JFrame with a JTextArea in it. How to Use Buttons, Check Boxes, and Radio Buttons If you set the RIGHT_TO_LEFT constant to true and recompile, you can see how FlowLayout handles a container that has a right-to-left component orientation.Ĭenters a component nicely in the top part of a BorderLayout, and puts the component in a JPanel that uses a FlowLayout. Sets up a content pane to use FlowLayout. ![]() The following table lists code examples that use the FlowLayout class and provides links to related sections. The hgap and vgap arguments specify the number of pixels to put between components. When the FlowLayout object controls a container with a left-to right component orientation (the default), the LEADING value specifies the components to be left-aligned and the TRAILING value specifies the components to be right-aligned.įlowLayout (int align, int hgap, int vgap)Ĭreates a new flow layout manager with the indicated alignment and the indicated horizontal and vertical gaps. The alignment argument can be FlowLayout.LEADING, FlowLayout.CENTER, or FlowLayout.TRAILING. ConstructorĬonstructs a new FlowLayout object with a centered alignment and horizontal and vertical gaps with the default size of 5 pixels.Ĭreates a new flow layout manager with the indicated alignment and horizontal and vertical gaps with the default size of 5 pixels. The following table lists constructors of the FlowLayout class. The code snippet below creates a FlowLayout object and the components it manages.ĬtComponentOrientation( Another constructor of the FlowLayout class specifies how much vertical or horizontal padding is put around the components. To specify that the row is to aligned either to the left or right, use a FlowLayout constructor that takes an alignment argument. If the container is wider than necessary for a row of components, the row is, by default, centered horizontally within the container. If the horizontal space in the container is too small to put all the components in one row, the FlowLayout class uses multiple rows. ![]() The FlowLayout class puts components in a row, sized at their preferred size. Alternatively, to compile and run the example yourself, consult the example index. Java™ Web Start ( download JDK 7 or later). The following figure represents a snapshot of an application that uses the flow layout:Ĭlick the Launch button to run FlowLayoutDemo using If you are interested in using JavaFX to create your GUI, seeįlowLayout class provides a very simple layout manager that is used, by default, by the JPanel objects. Otherwise, if you want to code by hand and do not want to use GroupLayout, then GridBagLayout is recommended as the next most flexible and powerful layout manager. If you are not interested in learning all the details of layout management, you might prefer to use the GroupLayout layout manager combined with a builder tool to lay out your GUI. Note: This lesson covers writing layout code by hand, which can be challenging.
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