Core Java 면접 질문과 답변
Question: Explain the usage of Java packages.Answer: This is a way to organize files when a project consists of multiple modules. It also helps resolve naming conflicts when different packages have classes with the same names. Packages access level also allows you to protect data from being used by the non-authorized classes.e.g. 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 (JDBC) to access databases java.awt basic hierarchy of packages for native GUI components javax.swing hierarchy of packages for platform-independent rich GUI components java.applet classes for creating an applet |
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