You need these Java 25+ runtimes to use Pi4J (V4+): When you want to use Pi4J in your project, you should definitely check out the Pi4J website where you can find a lot of information and many ...
Raspberry Pi Pico's built-in bootloader allows you to write firmware via USB or SWD. However, in some situations, other interfaces may be useful. Picoboot3 now offers the options of UART, I2C and SPI.