This article analyzes the BoxLayout layout in java Swing layout management for your reference. The specific content is as follows
BoxLayout: You can specify whether to place controls horizontally or vertically in the container, which is more flexible than FlowLayout.
BoxLayout is slightly different from other layout managers, and must pass a reference to the container instance into its constructor, which uses BoxLayout. In addition, you must specify how the components in BoxLayout are laid out: vertically (by column) or horizontally (by row). Nesting multi-panels with different combinations of horizontal and vertical components works similar to GridBagLayout, but not that complicated.
1. Constructor
BoxLayout(Container target, int axis): Creates a layout manager that will place components along the given axis.
LINE_AXIS: Specifies that the component should be placed according to the text line orientation determined by the ComponentOrientation property of the target container.
PAGE_AXIS: Specifies the flow direction of components in the page according to the text lines determined by the ComponentOrientation property of the target container.
X_AXIS: Specifies that components should be placed from left to right.
Y_AXIS: Specifies that the component should be placed from top to bottom.
2. Common methods
getAxis() : Returns the axis used to layout the component.
getLayoutAlignmentX(Container target): Returns the container's alignment along the X-axis.
getLayoutAlignmentY(Container target): Returns the alignment of the container along the Y axis
getTarget() : Returns the container using this layout manager.
3. Example
<span style="font-family:KaiTi_GB2312;font-size:18px;">import java.awt.Container; import javax.swing.BoxLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.UIManager; public class BoxLayoutDemo { public static void main(String[] args) { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (Exception e) { } JFrame frame = new JFrame("BoxLayout Test"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Container panel = frame.getContentPane(); panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS)); for (float align = 0.0f; align <= 1.0f; align += 0.25f) { JButton button = new JButton("X align = " + align); button.setAlignmentX(align); panel.add(button); } frame.setSize(400, 300); frame.setVisible(true); } } </span>4. Results
The above is all the content of this article. I hope it will be helpful and inspiring for everyone to learn Java Swing layout management. Thank you for your reading.