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Unable to install Java 7 in Eclipse on Mac OS


I installed Java 7 on my Mac, and tried to update Java 7 in my Eclipse application build path. After adding the jdk configuration, Eclipse was throwing below error:

Build path entry is missing: org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7

To address this problem, open your terminal and run below commands. After running these commands, restart your Eclipse and set Java 7 in your application build path.

cd /Library/Java/JavaVirtualMachines
sudo ln -s `pwd`/JDK\ 1.7.0\ Developer\ Preview.jdk/Contents/Home jdk-1.7.0

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Knowledge Centre
What is fail-fast in java?
A fail-fast system is nothing but immediately report any failure that is likely to lead to failure. When a problem occurs, a fail-fast system fails immediately. In Java, we can find this behavior with iterators. Incase, you have called iterator on a collection object, and another thread tries to modify the collection object, then concurrent modification exception will be thrown. This is called fail-fast.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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