I'm not saying a more complex requirement might benefit from a compounding solution (I'd be tempted to put the min/max/close and tab buttons in there own containers), but as a starting point, it's relatively simple. So, this solution is a single container, with a single layout manager. Gbc.anchor = GridBagConstraints.BASELINE_TRAILING Īrrgggh, the complexity burns, it burns □ sarcasm 37: 38: 39: package java.awt 40: 41: import java.io.Serializable 42: 43: / This class implements a flow-based layout. GridBagConstraints gbc = new GridBagConstraints() Uses a panel with a right-aligned FlowLayout presenting two buttons.I would highly recommend GridBagLayout, it's one of the most flexible and configurable layout managers available, but it does bring with it complexity By default, JFrame uses the layout manager i.e. If you set the RIGHT_TO_LEFT constant to true and recompile, you can see how FlowLayout handles a container that has a right-to-left component orientation.Ĭenters a component nicely in the top part of a BorderLayout, and puts the component in a JPanel that uses a FlowLayout. The class contain the following constructors and methods. Sets up a content pane to use FlowLayout. The FlowLayout is the default layout manager for a Panel, Applet and JPanel. The following table lists code examples that use the FlowLayout class and provides links to related sections. A flow layout arranges components in a directional flow, much like lines of text in a paragraph. The hgap and vgap arguments specify the number of pixels to put between components. When the FlowLayout object controls a container with a left-to right component orientation (the default), the LEADING value specifies the components to be left-aligned and the TRAILING value specifies the components to be right-aligned.įlowLayout (int align, int hgap, int vgap)Ĭreates a new flow layout manager with the indicated alignment and the indicated horizontal and vertical gaps. The alignment argument can be FlowLayout.LEADING, FlowLayout.CENTER, or FlowLayout.TRAILING. 构造函数Ĭonstructs a new FlowLayout object with a centered alignment and horizontal and vertical gaps with the default size of 5 pixels.Ĭreates a new flow layout manager with the indicated alignment and horizontal and vertical gaps with the default size of 5 pixels. The following table lists constructors of the FlowLayout class. The code snippet below creates a FlowLayout object and the components it manages.ĬtComponentOrientation( Another constructor of the FlowLayout class specifies how much vertical or horizontal padding is put around the components. To specify that the row is to aligned either to the left or right, use a FlowLayout constructor that takes an alignment argument. If the container is wider than necessary for a row of components, the row is, by default, centered horizontally within the container. 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. BorderLayout in Java or the Layout manager is an object that every container object has, which controls its layout i.e. 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. setAlignment (FlowLayout.LEFT) buttonPanel. Class is used to build an Application, to define an applet. One such builder tool is the NetBeans IDE. JPanel buttonPanel new JPanel () FlowLayout layout new FlowLayout () layout. Class Definition in Java Declaring Variables Constructors Variable Types Polymorphism in Java Dynamic Method Dispatch Access Specification in Java Practice Questions Assignment Q&A Introduction The basic element of object oriented Programming in Java is a class. 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. 注意: This lesson covers writing layout code by hand, which can be challenging.
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