installed JDK 7 is not found in eclipse

Question

I run eclipse helios (64 bit version) on windows 7 (64 bit) platform. I've downloaded both JDK 6 and 7 on "Program Files" folder. I want to compile my Java program in Java 1.7 so that I'd following to switch it.

1. click on project folder
2. select Properties
3. select Java Compiler

However system doesn't show Java 1.7 option.

[update]

after adding jdk 1.7 under installed JREs.

Answer 1

Firstly, you need config eclipse jdk , add the jdk 1.7 to eclipse, the following screenshot is below

click Windows->Prefrence

then click Add...

then next

select the jre directory, then click finish button, you will find the jdk7 choice