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Java Error: Cannot make a static reference to the non-static method
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Non-static variable cannot be referenced from a static context
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try catch exception always returns null
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java.lang.StringIndexOutOfBoundsException: String index out of range
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Avoiding NullPointerException in Java
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Problem with "scopes" of variables in try catch blocks in Java
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What is IndexOutOfBoundsException? How can I fix it?
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System.NullPointerException: Attempt to de-reference a null object:
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Test Method throwing null pointer exception on custom setting