Whenever we install Java using JDK installer it creates two folders in installation directory one for JDK and one for JRE. However, JDK folder also contains one JRE folder itself and both have the same directory structure. JDK Structure Let’s assume JDK is installed at \jdk1.7.0 , below are some of the most important directories and their explanation jdk1.7.0 db include src.zip bin java* javac* javap* javah* javadoc* lib tools.jar dt.jar jre bin java* lib applet ext jfxrt.jar localdata.jar fonts security sparc server client rt.jar Charsets.jar \jdk1.7.0 → This is the root directory of the JDK software installation which contains copyright, license, and readme files, src.z
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