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Gives error in java

I think it is very probable that this is causing the observed error. Printf didn' t exist in Java 1. Check that the Compiler compliance level is set to at. You' re getting the error because you' re using Java 1. 5 which does not support @ Override annotations for implementation overrides. Go into the Eclipse settings and set the language level to 1. EDIT - to change the language. Make sure that your IDE projects are setup to use a Java 6 JRE, and that the " source compatibility" is set to 1. The error under Java 5 isn' t just with Eclipse; using javac directly from the command line will give you pending on how you were writing your code you may also have seen a message from eclipse such as " The operator < = is undefined for the argument type( s) boolean, Boolean" or from javac such as " error: unexpected type. The only way this error will occur is if your module' s language level isn' t set to 1. easy mistake to make when you don' t intend on using the result of your closeable resource.

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    Gives java error

    yet it will have that misleading error. u000d is a Unicode character that stands for the CR special character. Even before the compiler transforms the source code, this character is pre- processed and causes the source code to be invalid. is the wrong character to use to denote a string - you should use ". Here you go: throw new java. Error( " this is very bad" ) ;. More idiomatic to throw a subclass of Exception. RuntimeException in particular is unchecked ( e. , methods don' t need to declare that they might throw it). is a special metacharacter in regex which repeats the previous character one or more times. You need to escape it to match a literal +.

    String[ ] strparts = str. split( " \ \ + " ) ;. public class Testclass { int a; int i; int j; public int calculate( i, j) { a= i+ j; return a; } }. In your method parameters, you are declaring local variables, they are not the same as the instance variables i and j. This meaning: you must.