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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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What is race condition?
A race condition is a situation in which two or more threads or processes are reading or writing some shared data, and the final result depends on the timing of how the threads are scheduled. Race conditions can lead to unpredictable results and subtle program bugs. A thread can prevent this from happening by locking an object. When an object is locked by one thread and another thread tries to call a synchronized method on the same object, the second thread will block until the object is unlocked.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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