Digital Clock

A Java Swing desktop clock application with dark/light theme, analog dial, timezone picker, stopwatch, countdown timer, and alarm. Pure Java SE — no external dependencies.

Features

• Digital clock — 12H/24H format toggle, colon‑blink effect, AM/PM indicator
• Analog dial — Java2D‑rendered face with hour, minute, second hands
• Dark / Light theme — ☀/☾ toggle, colors synced across all panels
• Timezone picker — 🌐 globe button opens a searchable dialog of ~600 IANA zones grouped by country; heading and GMT offset update live
• Stopwatch — ⏱ Start/Stop, Lap recording with auto‑scrolling list, Reset
• Countdown timer — ⏲ +1/+5/+10/+30 min presets, Start/Pause/Resume, audible beep on zero
• Alarm — ⌚ set time with ▲/▼ adjusters, AM/PM toggle, arm with Dismiss & Snooze (+5 min); repeats beep until dismissed
• Persistence — theme, format, timezone, alarm state, and window position saved across restarts via java.util.prefs

Screenshots

Dark Theme (12H)	Light Theme (24H)

Feature	Dark	Light
Timezone Picker
Stopwatch
Timer
Alarm

Build & Run

# Compile
javac -d out src/com/digiclock/*.java

# Copy resources (fonts + icon)
cp -r src/com/digiclock/resources out/com/digiclock/

# Run
java -cp out com.digiclock.Main

Controls

Button	Action
🌐	Open timezone picker
⏱ / ⏰	Toggle stopwatch
⏲ / ⏰	Toggle timer
⌚ / ⏰	Toggle alarm
24H / 12H	Toggle time format
☀ / ☾	Toggle dark/light theme

Requirements

• Java 8+ (java.time, javax.sound.sampled)
• No external dependencies — pure Java SE

Fonts

The app loads three custom .ttf fonts at runtime (bundled under resources/fonts/):

• Audiowide — heading / title
• Orbitron — time displays and stopwatch/timer/alarm readouts
• Rajdhani — date and GMT offset label

Project Structure

src/com/digiclock/
├── Main.java              — Application entry point
├── Window.java            — Main JFrame, layout, theme, preferences
├── ClockPanel.java        — Digital clock with java.time background thread
├── DialPanel.java         — Analog clock dial (Java2D)
├── TimezonePicker.java    — Searchable timezone selection dialog
├── Button.java            — RoundedButton + RoundedBorder
├── AudioUtil.java         — Shared playBeep() via javax.sound.sampled
├── StopwatchPanel.java    — Stopwatch (Start/Stop, Lap, Reset)
├── TimerPanel.java        — Countdown timer (+1/+5/+10/+30, Start/Pause)
├── AlarmPanel.java        — Alarm (set time, arm, ring, Dismiss/Snooze)
└── resources/
    ├── icons/clock_icon.png
    └── fonts/*.ttf