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Basically, yes. The two key points from the post you reference:
1) Match the 64-bit JDK with 64-bit SQL Developer.
2) Java 7 is not certified with any SQL Developer version as yet, so it's best to install the latest version in the jdk1.6.0 series, currently jdk1.6.0_27.
See the following post for one specific Java 7 issue. Embedded links lead to other comments on using Java 7 (or not):
Re: Lost my connections.
SQL Developer Team
Here’s my PC environment :
OS Platform : Windows 7 Ultimate 64 bits
JDK : 1.6 .0_24, 64 bits
While click on the Oracle SQL developer, it prompts me to key in the JDK folder. However, after i specified the JDK folder, it prompts me following error dialog box :
Unable to find Java Virtual Machine. To point to a location of a Java Virtual Machine....
Oracle SQL developer is NOT support on 64 bits JDK. To solve it, install a 32 bits / x86 JDK and update your SQL developer config file, so that it points to the 32 bits JDK.