![]() ![]() import Managers are used to arrange components in a specific order. In a vertical box, the following program creates three boxes, one eachįilled with left, center, and right aligned buttons. To demonstrate the right, left, center nature of different size buttons There are constants available in theĬomponent class so you don't really need to know what the values areįor right and left alignment. Or top alignment and 1 represents right or bottom alignment, depending Range of each setting is from 0 to 1.0, inclusive, where 0 represents left Thanks to its get/setAlignmentX() and get/setAlignmentY() methods. This is where the different alignments of a component come into play.Įach Swing component has an X-alignment setting and a Y-alignment setting With components of a different height, how about them? In other words, if you have a tall column, where doĬomponents of a different width end up? And, if you have a wide row Wider than necessary for a vertical box or taller than necessary with a Life gets interesting with Box/BoxLayout when the components within theĬontainer are a different size or the height/width of the container is Trying not to confuse you too much, but the example is back to JFrame frame = new JFrame("Horizontal Box") Though this time the glue grows in size to take up added space, instead Working with a horizontal box and glue produces similar results, Of component alignment until a little later. ![]() ThisĮxample uses a Button instead of a JButton to avoid an explanation The distance between theĬomponents remain unchanged, to match the reserved strut space. When the window size increased or decreased. Once you compile and run it, notice how the components change in size JFrame frame = new JFrame("Vertical Box") įtDefaultCloseOperation(JFrame.EXIT_ON_CLOSE) Top two components and a 10 pixel strut between the bottom two. To demonstrate, this first program creates a 25 pixel strut between the The same task can be done with GridBagConstraints The use of these allows you to place components within a container, eitherĪ fixed-distance apart with a strut, or a growing/shrinking area based uponĪvailable space, with glue. The Box class offers the creation of two supporting components, oneĪ strut, or fixed-size filler area, the other glue for an expandable area. Maximum preferred size of the component is honored. With BoxLayout, that isn't the case, and the In a GridLayout controlled container, all the components are expected Places everything into a single column, whereas a horizontal box On the proper access, depending upon direction. Its static methods: Box vertical = Box.createVerticalBox() īox horizontal = Box.createHorizontalBox() īoth are using BoxLayout under the covers, placing added components Makes the use of the Box container more popular, since all you have toĭo is ask for a horizontally or vertically laid out Box through one of Into the constructor of the layout manager, thus having a reference to the Instead, the BoxLayout constructor requires you to pass the Container The layout manager, and associate the layout manager with the Container. Typical UsageīoxLayout is unlike most layout managers which just require you to create Of the underlying components allows even more control of the positioning This may sound like a not-so-complicated layout manager,īut with the help of Box and its glue and struts, you'd think that wouldīe enough, but there is even more. This allows you to layout a single row or column of components ![]() One of the standard layout managers that come with the Java platform isīoxLayout. ![]()
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