Codename One Counter App - Codename-one Typing CST Test
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Codename One Counter App — Codename-one Code
Demonstrates a simple counter app with increment and decrement buttons in Codename One.
import com.codename1.ui.*;
import com.codename1.ui.layouts.FlowLayout;
public class CounterApp extends Form {
private int count = 0;
private Label counterLabel;
public CounterApp() {
setTitle("Counter App");
setLayout(new FlowLayout(Component.CENTER));
counterLabel = new Label("0");
Button inc = new Button("+");
Button dec = new Button("-");
inc.addActionListener(e -> update(++count));
dec.addActionListener(e -> update(--count));
addAll(dec, counterLabel, inc);
}
private void update(int value) {
counterLabel.setText(String.valueOf(value));
revalidate();
}
}Codename-one Language Guide
Codename One is a cross-platform mobile development framework that allows developers to build native mobile apps for iOS, Android, Windows, macOS, and web using Java or Kotlin. It provides a single codebase with a rich set of UI components and native device access.
Primary Use Cases
- ▸Cross-platform mobile apps for iOS, Android, Windows, macOS
- ▸Enterprise mobile solutions and internal tools
- ▸Consumer apps targeting multiple devices
- ▸Rapid prototyping with Java/Kotlin
- ▸Apps requiring native device features (camera, sensors, storage)
Notable Features
- ▸Single Java/Kotlin codebase for all platforms
- ▸Native compilation for iOS, Android, and desktop
- ▸Rich set of UI components with theming support
- ▸Access to device APIs via lightweight wrappers
- ▸Cloud build service for automated native compilation
Origin & Creator
Created by Shai Almog and the Codename One team in 2012, Codename One was designed to simplify mobile app development across platforms using Java.
Industrial Note
Best suited for teams with strong Java expertise who want to write once and deploy anywhere without managing multiple platform-specific projects.