The rows in the grid can have different heights, and grid columns can have different widths.įor further details, see How to Use GridBagLayout. It aligns components by placing them within a grid of cells, allowing components to span more than one cell. GridBagLayout is a sophisticated, flexible layout manager. Both panels in CardLayoutDemo, shown previously, use FlowLayout.įor further details, see How to Use FlowLayout. It simply lays out components in a single row, starting a new row if its container is not sufficiently wide. FlowLayoutįlowLayout is the default layout manager for every JPanel. Tabbed pane, which provides similar functionality but with a pre-defined GUI.įor further details, see How to Use CardLayout. An alternative to using CardLayout is using a A CardLayout is often controlled by a combo box, with the state of the combo box determining which panel (group of components) the CardLayout displays. The CardLayout class lets you implement an area that contains different components at different times. It respects the components' requested maximum sizes and also lets you align components.įor further details, see How to Use BoxLayout. The BoxLayout class puts components in a single row or column. JToolBar must be created within a BorderLayout container, if you want to be able to drag and drop the bars away from their starting positions.įor further details, see How to Use BorderLayout. All extra space is placed in the center area. Using Top-Level Containers explains, the content pane is the main container in all frames, applets, and dialogs.) A BorderLayout places components in up to five areas: top, bottom, left, right, and center. If you are interested in using JavaFX to create your GUI, seeĮvery content pane is initialized to use a BorderLayout. 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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