Where are the *.java & *.class ,when jvm try to find??

[Jianfeng Qian]

Where are the *.java & *.class ,and how jvm find them??
1.where is the location of java foundation class ?
*.java I think is in the j2sdk/src.zip ,but where is the *.class?
2.where is the other source ,such as jsp or ejb ?
when i install j2ee or tomcat ,apache,struts, ant?
how the jvm to find the *.java and *.class?

I need help

[Nigel Browne]

What is it you are trying to do? If you want to have a look inside the code files of the core java packages then yes you can open up the src.zip file and take a look. You will find the compiled class files are mainly packaged in the rt.jar file which resides in the <java-home>/lib/rt
When you install J2EE then you get another set of java and class file within there own .zip and .jar files. The same is true for Ant, JUnit, Log4J e.t.c.

[Jianfeng Qian]

Thanks a lot
I find there are some class int the j2sdk/lib ,such as dt.jar tool.jar
but I didn't find such as Object.class and other in the jar ,does it exist ? or the class only produce after compile?

[Nigel Browne]

Object.class is in the rt.jar file. It is in the java/lang package.

[Jianfeng Qian]

thank you .I find it