Updating a jlabel Situs sexs
So far, all of our Java programs have been command line programs, which we interacted with through the command prompt, if we interacted with the program at all.
Command line programs are fine for simple tasks or for programs that don’t really interact with the user, but if you want to interact with the user, then you probably want to create a graphical user interface, or GUI (pronounced “gee-you-eye” or “gooey”).
Trying to understand how all of these classes fit together can be confusing, so here’s a brief summary of how they work: , which is a program that runs on your computer, not in a webpage.
Think of opening up the Spotify application, not going to Spotify’s website.
) The code causes a window to show: Our window is blank, because we haven’t added anything to it yet.
In addition to the class, passing in an argument that sets the text of the button. Finally, we set the size of the window and show it.
Right now the button just takes up the whole window, and nothing happens when you click it. The This gives us a box of text that the user can type into: Again, you can customize this component using functions you find in the Java API. This tutorial isn’t meant to show you every single thing you can do with Swing.
For example, let’s create an is printed to the console.By default, the components are displayed one after the other, and they wrap to multiple rows if the window is not wide enough to fit them.Try changing the width of the window to see the components rearrange themselves.There isn’t really a limit to how much nesting you can have!So far, our components haven’t done anything other than display.
Search for updating a jlabel:
We probably want to do something a little more involved than just printing something to the console when the user clicks the button, though.