Setting path variable (JDK)
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Right click on ‘My Computer’ > select Properties. A dialog box will appear named ‘System Properties’

System_Properties
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select (tab) Advanced > Environment Variables

Advance (tab)
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in the ‘System variables’, select ‘path’ and click on ‘Edit’

Environment_variables
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Place the cursor at the beginning of ‘Variable value’ and insert the path of ur JDK (bin) folder. By default it should be,
C:\Program Files\Java\jdk1.6.0_13\bin; (semicolon at the end)
click ok.
Edit_System_variable
that’s all !!