Java Compile Time Error Messages
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Compile Time Errors In C++
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Compile Time Error And Runtime Error In C
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are here : home Java Glossary C words compile time error messages ©1996-2016 2008-08-30 Roedy Green of Canadian Mind Products compile time error messages This table contains errors detected at compile time. If you don’t find your error listed
Example Of Compile Time Error In C
here, send me an email at containing the complete source compile time error definition code so I too can compile it and I will figure out what it means why is readability a desirable characteristic of a program? and add it to this list. run time error messages error messages Index To Compile Time Error Messages menu ( expected class should be http://www.theserverside.com/tutorial/The-most-common-compile-time-errors-in-Java declared in file not a statement . expected class, enum or interface expected not abstract .class expected classname not enclosing class not accessible ; expected Comparable cannot be inherited not found in import ; missing constructor calls overridden method not initialised = expected constructor used as method operator http://mindprod.com/jgloss/compileerrormessages.html + [ expected duplicate class operator || already defined duplicate methods package does not exist ambiguous class enum as identifier permission denied array not initialised error while writing possible loss of precision attempt to reference Exception never thrown public class should be in file attempt to rename final parameter may not be assigned reached end of file while parsing bad class file generic array creation recompile with -Xlint:unchecked blank final identifier expected redefined method boolean dereferenced illegal character reference ambiguous bound mismatch illegal escape repeated modifier cannot find symbol illegal forward reference return in constructor cannot override, attempting weaker access illegal reference to static return outside method cannot override, does not throw illegal start return required cannot override, incompatible return type impotent setters serialVersionUID required cannot resolve constructor incompatible type should be declared in file cannot resolve symbol instance not accessible statement expected
into three categories: Lexical: These generally occur when you include disallowed characters in your code (e.g. int #people = 10;). Syntactical: These occur when your code is "out of http://www.terryanderson.ca/debugging/compile.html order" (e.g. for (int i=0; i++; i<10)). Semantic: These occur when the meaning of your code is unclear (e.g. two variables with the same name). Note that the exact wording of these errors https://docs.oracle.com/javase/tutorial/getStarted/problems/ may vary, depending on which development environment you are using. Errors described on this page (click to jump to that error): Cannot return a value from a method of type void 'Class' or time error 'interface' expected Class should be delcared abstract; it does not define... Else without if Expected: ;, {, }, (, or ) Identifier expected / Illegal character Incompatible types / Inconvertible types (cannot cast) Method does not return a value / Missing return statement Method not found Not a statement Return type required Unreachable statement Variable already defined Variable not declared Cannot return a value from a compile time error method of type void When a method is declared as having a return type of void, it cannot contain any return statements which return a value (it can, however, contain a return statement by itself, which will simply end the execution of the method). This problem is usually caused by accidentally making a method be of type void when it shouldn't be or by accidentally including a return statement where there shouldn't be one. Example 1: Incorrect Code Example 1: Fixed Code This method has a return type of void and so it may not return any values. We change the return type of this method in order to fix the problem. 01 public void getName() 02 { return this.name; 03 } 01 public String getName() 02 { return this.name; 03 } 'Class' or 'interface' expected This error will most likely be caused when you omit the keyword class or interface, as seen in the example below. Example 1: Incorrect Code Example 1: Fixed Code Here, we do not have either keyword present. We add in class or interface, depending on our intentions within the program. 01 public Test 02 { 03 public void someMethod() 04 { System.out.println("Hello,
Common Problems (and Their Solutions) Compiler Problems Common Error Messages on Microsoft Windows Systems 'javac' is not recognized as an internal or external command, operable program or batch file If you receive this error, Windows cannot find the compiler (javac). Here's one way to tell Windows where to find javac. Suppose you installed the JDK in C:\jdk1.8.0. At the prompt you would type the following command and press Enter: C:\jdk1.8.0\bin\javac HelloWorldApp.java If you choose this option, you'll have to precede your javac and java commands with C:\jdk1.8.0\bin\ each time you compile or run a program. To avoid this extra typing, consult the section Updating the PATH variable in the JDK 8 installation instructions. Class names, 'HelloWorldApp', are only accepted if annotation processing is explicitly requested If you receive this error, you forgot to include the .java suffix when compiling the program. Remember, the command is javac HelloWorldApp.java not javac HelloWorldApp. Common Error Messages on UNIX Systems javac: Command not found If you receive this error, UNIX cannot find the compiler, javac. Here's one way to tell UNIX where to find javac. Suppose you installed the JDK in /usr/local/jdk1.8.0. At the prompt you would type the following command and press Return: /usr/local/jdk1.8.0/javac HelloWorldApp.java Note: If you choose this option, each time you compile or run a program, you'll have to precede your javac and java commands with /usr/local/jdk1.8.0/. To avoid this extra typing, you could add this information to your PATH variable. The steps for doing so will vary depending on which shell you are currently running. Class names, 'HelloWorldApp', are only accepted if annotation processing is explicitly requested If you receive this error, you forgot to include the .java suffix when compiling the program. Remember, the command is javac HelloWorldApp.java not javac HelloWorldApp. Syntax Errors (All Platforms) If you mistype part of a program, the compiler may issue a syntax error. The message usually displays the type of the error, the line number where the error was detected, the code on that line, and the position of the error within the code. Here's an error caused by omitting a semicolon (;) at the end of a statement: testing.java:14: `;' expec