java.awt Minimal AWT package for Rectangle class Input/Output support
java.lang Core Java classes
java.util Utilities
javax.bluetooth J2ME I/O.
javax.microedition.lcdui J2ME LCD User Interface classes.
lejos.navigation Navigation classes.
lejos.nxt Access to NXT sensors, motors, etc.
lejos.nxt.comm NXT communication classes
lejos.nxt.remote Remote NXT access over Bluetooth
lejos.rcxcomm Emulation of RCX communication classes
lejos.subsumption Support for subsumption architecture.
lejos.util More utility classes