This is the code that will be called when a user clicks the button: This will jump to the code and a piece of code will be generated. Double click on the button with a “7” (btn7). First interaction: add eventhandlers for the number buttonsįirst we are going to make the number buttons work. The one above the btnEq (equal sign) is not used and can have just an empty text. The variable names are written in red on the buttons: Give all buttons proper names and texts: change their variable names and the text properties of each of them according to the image below. Keep doing this for all 20 buttons until it looks like: Click the plus-sign in-front of Layout, then fill in the 5: Add buttons to the grid panelĪdd 20 buttons (JButton) to the buttonPanel (make sure to click inside that):Īfter the first button has been added, click on the right side of that to place the new button at the right side: Now define the layout: set the amount of columns the buttons in that panel will be in to 5. Next, add a JPanel, resize it so that is uses up the remaining space, name it “buttonPanel” and set its layout to GridLayout: Set the font to a larger font also, for instance Tahoma 24. Give it a proper name by modifying its properties, rename the Variable name to “display”: Make it auto resizable and align both left and right, by clicking the small arrow pointing left and then select “Auto Resizable”: Place it somewhere at the top and enlarge it by dragging the corner(s): We will use a textfield as the display of the calculator, and the buttons will be inside a panel, with a grid-layout. Set the layout of the contentPane to “Grouplayout”: Then set the option “Apply choosen LookAndFeel in main() method” (press Apply and Close): Set the look-and-feel of the app to Windows Classic:Īnd make sure it will get applied via the preferences: select Window > Preferences, then navigate to WindowBuilder, Swing, LookAndFeel. Set the title of the app by modifying the title property of the JFrame: We will create the userinterface with help of the Window Builder and its palette.įirst enlarge the window by selecting the in the components tree and then dragging the window at the lower-right corner: from a certain library) by clicking one of the warnings in-front of the lines with errors. If you have any errors left, you might have to fix the imports (an ‘import’ statement tells the compiler to use a package, eg. Click the first warning symbol that has a small light-bulb in front of line 10 (this indicates there are tips on how to resolve those), and click “Add ‘requires sktop’ to module-info.java”: You might get some errors in the code, this is because the imports and the module info are not setup yet: Browse to WindowBuilder, JFrame and click Next:Īt package name type “userinterface” and at name “Calculator”. Select File > New > Other (or press Ctrl + N) to add a Java file to the project. If a popup appears that asks you to fill in a module name, fill in “calculator” and press Create. Fill in the project name and press Finish (you may leave the other options at their default values): To start a new project, select File > New > Java Project from the menu. The installation will continue in the background (you can see its progress in the lower right corner). To start the installation press Next two times. (press Enter), and select WindowBuilder and WindowBuilder XWT Support: In Eclipse, choose Help > Install New Software… In the field Work with, enter this address: The tool to create graphical user interfaces is not part of all editions of Eclipse, and must be added manually. Select the option “Use this as the default and do not ask again” and click Launch: Eclipse: Add Window Builder Select the first option: “Eclipse IDE for Java Developers”:Ĭlick “Install” (keep options as they are). You can check that via Help > About, Installation Details.ĭownload the Eclipse Installer and run that. But make sure you also have installed the Window Builder plugin of Eclipse. If you already have Eclipse installed, you can skip this part. Installing the Eclipse IDE for Java Developers It is strongly recommended to also learn the Java basics using for instance the w3schools tutorial. This tutorial is meant for beginners who are just starting with Java. In this Java tutorial you will learn how to create a simple calculator using Eclipse.
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