Directory under JDK installation path

Bin directory

This directory is used to store some executable programs, such as

Javac.exe Java Compiler

Java.exe Java Runtime Tools

Jar.exe Packaging Tools

Javadoc.exe Document Generation Tool

DB Directory

The DB directory is a small database

Starting with jdk6.0, Java references a new member JAVADB, which is a thread Java implementation, open source database management system.

This database is not only lightweight, but also supports JDBC4.0 all specifications, when learning jdbc, do not need to install an additional database software, choose to use JAVADB directly

JRE Directory

The JRE is the abbreviation for the Java Runtime Environment, which means the Java Program Runtime environment. This directory is the root of the Java Runtime Environment, which includes the Java Virtual machine, the runtime's class package

Java Application Launcher and a bin directory, but does not include development tools in the development environment.

Include directory

Since the JDK is implemented through C and C + +, it is necessary to introduce some C-language header files at startup, which is used to store these header files.

Lib Directory

LIB is the abbreviation for the library, which means a Java class library or library file, which is the archive package file used by the development tool.

Src.zip file

Src.zip is the SRC folder of the compressed file, src is stored in the JDK core class source code, through the file can view the Java base class source

Directory under JDK installation path