常用的java基础类有哪些？急

java.awt.* 一系列:
Button,Frame,Graphics,Menu,Panel,TextField,List,Event,Color,ActionEvent,KeyAdpter,KeyEvent,MouseAdpter,MouseEvent,TextLayout

java.io 一系列:
File,BufferReader,BufferWriter,FileInputStream,FileOutputStream,FileReader,FileWriter,Reader,Writer

java.lang.* 一系列:
System,String,Integer,Float,Double,Thread,Long,Math,Object,Class,Boolean

java.net 一系列:
Socket,ServerSocket,SocketAddress,URL,URLConnection

java.sql 一系列:
Date,Time,DriverManager

java.util.* 一系列:
ArrayList,Arrays,LinkedList,HashSet,Date,HashMap,Matcher,Pattern

javax.swing.* 一系列:
JFrame,JButton,Jpanel,JList,JMenu ,JCheckerBox,JDialog

你是说类别还是其它什么？

问题咧？