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Installing the Java SE Development Kit (JDK)
The Java SE Development Kit (JDK) can be downloaded from http://www.oracle.com/technetwork/java/javase/downloads/index.html. You may choose to skip this step if you already have the JDK 7 Update 45 (or later) installed on your system.
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You will need to accept the JDK 7 License Agreement before selecting the appropriate distribution. After downloading the JDK, run the setup program and follow the instructions and prompts.