If the horizontal space in the container is too small to put all the components in. ![]() Uses a panel with a right-aligned FlowLayout presenting two buttons. The FlowLayout class puts components in a row, sized at their preferred size. 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. The flow layout manager arranges components in a row from left to right, starting a new row if no more components fit into a row. 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. It lays the components in the order they are added to the container. It lays out the components horizontally, and then vertically. The hgap and vgap arguments specify the number of pixels to put between components. The FlowLayout is the simplest layout manager in Swing. 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 The line alignment is determined by the align property. It arranges buttons horizontally until no more buttons fit on the same line. 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. Flow layouts are typically used to arrange buttons in a panel. 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. I would also like to make the panel vertically scrollable. The line breaks would cause a jump to the next line. The labels should flow from left to right, wrapping to the next 'line' if needed. 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. I would only add textual labels and line breaks to this panel. JFrame using the default FlowLayout: //file: Flow.java import java.awt.* import .* import : This lesson covers writing layout code by hand, which can be challenging. ![]() The implicit layout manager of a JPanel is FlowLayout. The following example adds five buttons to the content pane of a Swing library is an official Java GUI toolkit released by Sun Microsystems. By default, a flow layout uses CENTER justification, meaning that allĬomponents are centered within the area allotted to them. Justification of LEFT, CENTER, or RIGHT and a fixed Layout manager that tries to arrange components at their preferred sizes,įrom left to right and top to bottom in the container.
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