Question about Jre folder

Hi,
After installing Java, I have a JRE folder under jdk1.5.0_03 directory,
and another folder jre1.5.0_03 under java directory.
Can someone please tell me the different between these two folders? Which one is the run-time jre? Thanks in advance.

The differences are explained in the Installation Instructions for the product that you installed - and didn't read the instructions :)
Here is the explanation (and I recommend you back up and read the instructions, there is other useful information there.)
"Private vs. public JRE - Installing the JDK installs a private J2SE Runtime Environment (JRE) and optionally a public copy. The private JRE is required to run the tools included with the JDK. It has no registry settings and is contained entirely in a jre directory (typically at C:\Program Files\jdk1.5.0\jre) whose location is known only to the JDK. On the other hand, the public JRE can be used by other Java applications, is contained outside the JDK (typically at C:\Program Files\Java\jre1.5.0), is registered with the Windows registry (at HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft), can be removed using Add/Remove Programs, might or might not be registered with browsers, and might or might not have java.exe copied to the Windows system directory (making it the default system Java platform or not). "

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