Noclassdefinitionfound Error In Java
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here for a quick overview of the site Help Center Detailed answers to any questions you might java.lang.noclassdeffounderror android have Meta Discuss the workings and policies of this site About noclassdeffounderror could not initialize class Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting how to resolve noclassdeffounderror in java ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 noclassdeffounderror vs classnotfoundexception million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How to Solve java.lang.NoClassDefFoundError? up vote 80 down vote favorite 22 I'm pretty new to Java, and I've just started learning about packages in Java. I've tried both the example in Oracle's Java Tutorials. They both compile fine,
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but at run-time, both come up with this error: Exception in thread "main" java.lang.NoClassDefFoundError: graphics/shapes/Square at Main.main(Main.java:7) Caused by: java.lang.ClassNotFoundException: graphics.shapes.Square at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 1 more I think I might have the Main.java file in the wrong folder. Here is the directory hierarchy: graphics ├ Main.java ├ shapes | ├ Square.java | ├ Triangle.java ├ linepoint | ├ Line.java | ├ Point.java ├ spaceobjects | ├ Cube.java | ├ RectPrism.java And here is Main.java: import graphics.shapes.*; import graphics.linepoint.* import graphics.spaceobjects.*; public class Main { public static void main(String args[]) { Square s = new Square(2,3,15); Line l = new Line(1,5,2,3); Cube c = new Cube(13,32,22); } } What am I doing wrong here? Any help would be appreciated. Thanks. UPDATE Thanks for the answers. They really helped. After I put put the Main class into the graphics package (I added package graphics; to it), set the classpath to "_test" (fold
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads
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with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the java.lang.noclassdeffounderror minecraft Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: java.lang.noclassdeffounderror maven Sign up Why am I getting a NoClassDefFoundError in Java? up vote 238 down vote favorite 59 I am getting a NoClassDefFoundError when I run my Java application. What is typically the cause of this? java noclassdeffounderror share|improve this question edited http://stackoverflow.com/questions/17973970/how-to-solve-java-lang-noclassdeffounderror Apr 11 '14 at 10:38 Duncan 36.8k979128 asked Aug 29 '08 at 14:59 John Meagher 9,62294250 I believe it can also happen if you don't run your java program with the correct syntax. For instance, you have to call your class from the root bin folder with the full package name (ie. my.package.myClass). I'd be more specific if I could but I'm not much of a java guy. I just remember messing this up a few times. –frank hadder Aug 29 http://stackoverflow.com/questions/34413/why-am-i-getting-a-noclassdeffounderror-in-java '08 at 15:06 14 @BoltClock We need a canonical question to point the numerous duplicates to. Why can't this be it? –Raedwald Jun 29 '14 at 10:09 11 Have you considered changing the accepted answer so that the one the community finds more valuable is at the top? –Martin Smith Jan 18 '15 at 12:00 add a comment| 13 Answers 13 active oldest votes up vote 125 down vote accepted This is caused when there is a class file that your code depends on and it is present at compile time but not found at runtime. Look for differences in your build time and runtime classpaths. share|improve this answer answered Aug 29 '08 at 15:01 Mocky 4,10752023 1 I had this error happen when putting a source file under the wrong namespace/package. I figured I could just put it anywhere, and the compiler was happy. Turns out I should have been more diligent for runtime to be happy as well. –CenterOrbit Oct 21 '14 at 15:34 I had this error once when my server ran out of memory during a file upload. Every time I tried the upload, I'd get a different error. Eventually it told me I didn't have enough heap space. –James M. Lay Apr 25 at 7:47 This answer is not necessarily true and will be misleading to many people! See the better answer from Jared below. –Dave L. Aug 31 at 16:42 add a
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