![]() 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. Not one of the five specified constants NullPointerException - if the target parameter is null Since: 1.5 See Also: addLayoutComponent(, : This lesson covers writing layout code by hand, which can be challenging. The location is empty Throws: IllegalArgumentException - if the constraint object is Returns: the component at the given location, or null if The constraint location based on the targetĬontainer's component orientation. Parameters: constraints - the desired absolute position, one of CENTER,ĮAST, WEST target - the Container used to obtain The Container's component orientation is used to determine the location of componentsĪdded with LINE_START and LINE_END. Take precedence over components added with the explicit constraints Returns the component that corresponds to the given constraint locationīased on the target Container's component orientation.Ĭomponents added with the relative constraints PAGE_START, ![]() Since: JDK1.0 See Also: Container.add(String, Component), Here is an example of five buttons in an applet laid out usingĪdd(new Button("North"), BorderLayout.NORTH) Īdd(new Button("South"), BorderLayout.SOUTH) Īdd(new Button("East"), BorderLayout.EAST) Īdd(new Button("West"), BorderLayout.WEST) Īdd(new Button("Center"), BorderLayout.CENTER) The CENTER component may stretch both horizontallyĪnd vertically to fill any space left over. WEST components may be stretched vertically Preferred sizes and the constraints of the container's size. The components are laid out according to their The isVertical setting on the container's NOTE: Currently (in the Java 2 platform v1.2), You use both types, the relative constants will take precedence.įor example, if you add components using both the NORTHĪnd PAGE_START constants in a container whose Mixing both absolute and relative positioning constants can lead to In a container whose ComponentOrientation is set toĬomponentOrientation.LEFT_TO_RIGHT, these constants map toįor compatibility with previous releases, BorderLayoutĪlso includes the relative positioning constants BEFORE_FIRST_LINE,Ĭonsistency with the relative positioning constants used by otherĬomponents, the latter constants are preferred. Positioning constants, PAGE_START, PAGE_END, In addition, BorderLayout supports the relative ![]() P2.add(new TextArea()) // Same as p.add(new TextArea(), BorderLayout.CENTER) P.add(new Button("Okay"), BorderLayout.SOUTH) Īs a convenience, BorderLayout interprets theĪbsence of a string specification the same as the constant Is identified by a corresponding constant:Ĭomponent to a container with a border layout, use one of these A border layout lays out a container, arranging and resizingĮach region may contain no more than one component, and
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