JAVA API 所有软件包的分层结构

软件包分层结构:
java.applet, java.awt, java.awt.color, java.awt.datatransfer, java.awt.dnd, java.awt.event, java.awt.font, java.awt.geom, java.awt.im, java.awt.im.spi, java.awt.image, java.awt.image.renderable, java.awt.print, java.beans, java.beans.beancontext, java.io, java.lang, java.lang.annotation, java.lang.instrument, java.lang.management, java.lang.ref, java.lang.reflect, java.math, java.net, java.nio, java.nio.channels, java.nio.channels.spi, java.nio.charset, java.nio.charset.spi, java.rmi, java.rmi.activation, java.rmi.dgc, java.rmi.registry, java.rmi.server, java.security, java.security.acl, java.security.cert, java.security.interfaces, java.security.spec, java.sql, java.text, java.util, java.util.concurrent, java.util.concurrent.atomic, java.util.concurrent.locks, java.util.jar, java.util.logging, java.util.prefs, java.util.regex, java.util.zip, javax.accessibility, javax.activity, javax.crypto, javax.crypto.interfaces, javax.crypto.spec, javax.swing, javax.swing.border, javax.swing.colorchooser, javax.swing.event, javax.swing.filechooser, javax.swing.plaf, javax.swing.plaf.basic, javax.swing.plaf.metal, javax.swing.plaf.multi, javax.swing.plaf.synth, javax.swing.table, javax.swing.text, javax.swing.text.html, javax.swing.text.html.parser, javax.swing.text.rtf, javax.swing.tree, javax.swing.undo

类分层结构

接口分层结构

注释类型分层结构

枚举分层结构