You can optionally use any subset of these regions making it a powerful organizer of relative elements. Components can be separated with default spacing as specified in the call to the constructor.īorderLayout This layout has NORTH, SOUTH, EAST, WEST, and CENTER regions. GridLayout will resize everything it can get its hands on to equally sized areas. GridLayout This manager organizes all of its elements in a rectangular grid with equally sized cells. JPanel uses FlowLayout as the default layout manager. This manager is not suitable for anything besides simple dialogs because of the uncertainty of final placement. You can define your own layout managers, and you should do so for large applications demanding a consistent look, but for the purposes of this article we are going to look at utilizing some of the standard layout managers.įlowLayout This manager places items left to right and slides the components to the next line when it runs out of horizontal space.
#Resize jbutton in flowlayout code
Layout managers allow us to create code which, can easily be upgraded and utilized on different displays. If someone were to change the wording on one of the labels of your interface, the entire look would become disjointed. Different LookAndFeel packages may display components in unusable ways with hard coded size and positions. It is difficult to maintain code and dangerous for long term usability when you utilize components at specific absolute locations. It is because of these vexing matters we turn to layout managers: Everything can go in its proper place once you know where that place is.
On other occasions, you may find yourself adding a lot of widgets to your container only to find them crawling around like rascally kittens during resizing. When you first add a number of components to your Java user interface, you may find yourself asking: Where did some of them go?
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