And when I added the JPanel with the button I added it to the SOUTH part of the BorderLayout, because that's how you display more than one component with BorderLayout. I added your text area to a ScrollPane because that's another way of dealing with the main content pane of a JFrame. Here is a working example: import import import import. KeyListener is an interface that deals with changes in the state of the keys of our keyboard. Groups of related lessons are organized into 'trails'. They include hundreds of complete, working examples, and dozens of lessons. Please go read the tutorial on JFrames and BorderLayout.Īnyway I made a quick program that does something like what you want. This tutorial introduces how to use KeyListener in Java and lists some example codes to understand the topic. The Java Tutorials are practical guides for programmers who want to use the Java programming language to create applications. By calling that method twice you're just replacing the previous component. 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. If you want more than one, you have to use a second component like a JPanel with a Grid or Flow layout. The FlowLayout class provides a very simple layout manager that is used, by default, by the JPanel objects. FlowLayout when used arranges swing components from left to right until theres no more space available. When JFrame is set visible, an eventdispatching thread is started. Java Swing Tutorial Explaining the FlowLayout. To add a component to a JFrame, we must use its contentPane instead.JFrame is a Window with border, title and buttons. FlowLayout arranges its components in order from left to right and top to bottom. The components added to the frame are referred to as itscontents these are managed by the contentPane. In this Java Swing GUI tutorial we will explore the Java Swing FlowLayout layout manager. One very important point is that jframe.getContentPane().add() for a default JFrame uses a layout that only admits one single component. JFrame Java Swing Tutorial Explaining the JFrame class. But otherwise you just kind of have to read the tutorials on the various components and their layouts, and experiment a bit. I double checked with the docs and FlowLayout does have an option to center its components, so mea culpa on that.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |