Anything in the java.lang package does not need to be imported. Note that we didn’t have to import the System class, because it’s in the java.lang package (check for yourself by looking it up in the Java API!. You can use the Scanner class to interact with the user, even without a fancy user interface!
COMPILING JAVA CLASSES WITH TEXT EDITPR CODE
Then the code uses the Scanner class to read what the user typed. This program prompts the user for their name, which they can enter by typing into the command prompt and pressing enter. Now we can compile and run this code, and it works! Hooray! You don’t want to use a fancy word processor like Microsoft Word though, because that kind of editor adds formatting and stuff that we don’t want in our code. I use jEdit, but you can use Notepad or whatever came with your computer. Eventually we’ll use a fancier editor, but for now let’s stick with doing things the “manual” way. To better understand what’s going on behind the scenes, we’re going to create our files using a basic text editor, and we’re going to compile and run our files using the command prompt. The Processing editor makes that easy, but it hid a lot of the details from us. In Processing, we used the Processing editor to write and run our sketches. This tutorial assumes that you’ve already been through the Processing tutorials and understand what code is, and what objects and classes are. If “close” menu item is selected the frame is closed by using the function isVisible(false).Now that you installed Java, it’s time to write some code! If the “new” menu item is selected the text of the text area will be set to blank.On selecting “open” menu item, a file chooser will get opened which will show the open dialog after selecting a file a file reader and a buffered reader would read the file and set the text of the text area to the contents of the file.On selecting “save” menu item, a file chooser will get opened which will show the save dialog after selecting a file the filewriter(buffered writer) would write the contents of the text area to the file and close the file writer and buffered writer.On selecting the cut, copy, paste and print menu item the inbuilt functions of text area cut(), copy(), paste() and print() will be invoked.Here is how the functions of the menu will be invoked: We will add the text area to the frame using add function set the size of the frame to 500,500 using setSize(500,500) function and then display the frame using show function.We will add the menu items to the menu and menu to the menubar using add() function and we would add the menubar to the frame using addJMenuBar() function.We will add an action listener to all the menu items(using addActionListener() function) to detect any action. “Edit” has 3 menu items cut, copy and paste.The “File” option has 4 menu items new, open, save and print.We will add a text area and a menubar with three menu File, Edit, and Close.
First, we will create a frame f titled “editor” and apply a metal look and feel and set an ocean theme in it.Method explanation cut() removes the selected area from the text area and store it in clipboard copy() copies the selected area from the text area and store it in clipboard paste() removes the selected area from the text area and store it in clipboard print() prints the components of the text areaįor more methods on JSwing components refer: