Check our section of free e-books and guides on Java Gui now! This page contains list of freely available E-books, Online Textbooks and Tutorials in Java Gui. This second edition of Java Swing thoroughly covers all the features available in Swing is the next-generation GUI toolkit that Sun Microsystems created to. In this chapter of Modern Java we get to grips with the idea of a container that is used to host components to build a user interface. We also find out how the.
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The three books in the Java series aim to give the learner a deep understanding of the Get ahead at work with our collection of personal development eBooks. Java GUI libraries. • Swing: the main Java GUI library. – Benefits: Features; cross- platform compatibility; OO design. – Paints GUI controls itself pixel-by-pixel. Editorial Reviews. Review. "The Learn Java (GUI Applications) For High School Students topics are introduced progressively to ensure that students of different.
To create a JFrame instance you simply use the standard way of creating an object from its class i. The new object MyFrame has a range of methods and properties that allow you to control the way it looks and how it behaves.
So to try this out start NetBeans and create a new Java project called container - accept all of the defaults. When the project has been created open the file container.
The code that you see contains the definition of a class called Container complete with the start of a single method called main - this is where your program starts.
When you run a probject the class of the same name is used to supply the main method which is obeyed. If you just run the project nothing much happens because there is no code in main.
Let's add a frame to the main method and display it. To create the frame we simply use:.
The first instruction sets the frame to x pixels, tells it to use a FlowLayout and then tells it to display. Don't worry about the setLayout method and the FlowLayout we need to look at these in more detail later. If you just add these lines to main you will discover that NetBeans complains at you - there are errors!
When ever you make use of a class from Swing, or any other framework we have to add an import instruction to the start of the program so that the Java system can find it. In fact you don't need to do it manually as if you click on the error symbol NetBeans will offer to add the necessary import instruction for you.
FlowLayout; import javax. JButton; import javax. This is the programmatic way of dropping a control onto the design surface in the designer. Of course it ignores the small problem of where the button will display within the container and this is what the layout manger mentioned eariler is responsible for. For the moment just accept the fact that the layout manager will take care of creating a default layour for your components.
The drag-and-drop designer provides a much simpler way of working with layout managers. You can resize the window and move it around the screen and the button will appear to work. We also have the panel and a range of variations based on it but this isn't a true container- it's really a component and hence very limited type of container.
All it does is allow you to group components together within other containers. In short, panels are fairly boring but occasionally useful when you want to group event handling together.
A frame on the other hand is a complete window. You can add other components to a frame and you can add a menu.
A dialog is a specialised sort of window intended to hold nothing but components that the user can interact with. A dialog appears, the user clicks buttons, enters text and then it goes away. This is generally refered to as a "modal" dialog box but dialogs don't have to be model - however they are "owned" by other frames and they are deleted when their parent frame is closed.
The third type of continer - the applet - allows a Java program to run in a browser. This is something we need to devote a whole chapter to so let's take a look at the frame and the dialog.
The JFrame Class After introducing the three types of container it seems worth looking in more detail at the frame. The reason is that the other two are similar in their use - but they have their own particular problems.
We have already encountered the frame in earlier chapters as it is the container that we have been using by default with the drag-and-drop editor. Now that we know about classes and objects let's do the same job but this time without the help of the editor. A frame is represented by the JFrame class and to make frames or windows appear on the screen all we have to do is create an instance of the class i.
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To create a JFrame instance you simply use the standard way of creating an object from its class i. The only BI solution you need for your business.
Last updated on:After introducing the three types of container it seems worth looking in more detail at the frame. When you first start to use Swing you can take the container for granted but later you really need to understand what the container is doing, what containers are available and how to make use of them.
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In this case we are using two classes - JFrame and FlowLayout - so we need to add: import java. To create a JFrame instance you simply use the standard way of creating an object from its class i. Java Succinctly Part 2. This assembly is going for virtue in 'Tis to be, over Matt's fingers and hanging on to them. The drag-and-drop designer provides a much simpler way of working with layout managers. If you just add these lines to main you will discover that NetBeans complains at you - there are errors!
In this part of Modern Java, we look at the standard ideas of object-oriented programming.
When ever you make use of a class from Swing, or any other framework we have to add an import instruction to the start of the program so that the Java system can find it.