java.lang |
— basic language functionality and fundamental types |
java.util |
— collection data structure classes |
java.io |
— file operations |
java.math |
— multiprecision arithmetics |
java.nio |
— the New I/O framework for Java |
java.net |
— networking operations, sockets, DNS lookups, … |
java.security |
— key generation, encryption and decryption |
java.sql |
— Java Database Connectivity to access databases |
java.awt |
— basic hierarchy of packages for native GUI components |
javax.swing |
— hierarchy of packages for platform-independent rich GUI components |