Hacks and Tweaks


March 2, 2010

Java Syntax Error Messages And Their Solutions

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Written by: arunenigma

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Common Java Syntax Error Messages

Exception in thread “main” java.lang.NoClassDefFoundError — wrong name

Exception in thread “main” java.lang.NoClassDefFoundError — /java

Exception in thread “main” java.lang.NoClassDefFoundError — /class

Exception in thread “main” java.lang.NoSuchMethodError: main

class is public, should be declared in a file named

cannot return a value from method whose result type is void

non-static method cannot be referenced from a static context

cannot find symbol — class

cannot find symbol — method

cannot find symbol — variable

‘}’ expected

‘class’ or ‘interface’ expected

illegal character


‘(‘ or ‘[‘ expected

variable might not have been initialized

unclosed string literal

missing return statement

‘;’ expected

incompatible types

‘[‘ expected

array required, but java.lang.String found

possible loss of precision

‘.class’ expected

attempting to assign weaker access privileges

call to super must be first statement in constructor

invalid method declaration; return type required

is not abstract and does not override abstract method

About the Author

Computer Science Graduate Student @ Case Western Reserve University, Cleveland, USA



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