Thank you so much Abhi!!! Already 4-5 correct responses have been given. Please help me solve this program since I'm a new user. If you understand the reason I hope you could resolve it yourself. Compare the JavaDoc for ConcurrentHashMap keySet in Java 1. Failing that you can avoid the unnecessary use of a concrete type for a variable here. You'll notice that there is a warning about bootstrap classpath.
NoSuchMethodError: main From: java-l Groups. This is due to covariance. At last, found this post that worked but not the best solution to change the original code to test it. I have no syntax errors at all with the other codes, but I seem to recieve that same error. Yes excuse my typos, why does the class have to be default and cannot be public? By the command to start java, what did you type on your command line or how did you attempt to run your program such that you got the output you described? Exception in thread main java. Remove the package name from the java file and use the commands in the command prompt. If it does not find the method, then the jvm throws this error.
Compilation is just resolution of dependencies syntactically; hence it does not in anyway gurantee that a successfully compiled file will run without throwing exceptions Cheers. And when I execute it,I get the java. Flower The Problem here is the setting the environment and the running of the class file. . This is the file from where the execution of java starts. The copiler is going to complain that methodOen does not exist. Please help me solve this program since I'm a new user.
This book has some bad examples. If you define a class A without public access mofier and the class has got the main method, the NoSuchMethodError: main will never be thrown. Have the file name as SimpleThreadTest. Possible Duplicate: I'm getting the following error: java. Regards Madhavi Latha Program file need to be saved as operation. I purchased the Beginning Programming with Java for Dummies and have tried to run other codes. So will the following modifications will make the code work? Jars are in src folder and build.
Its printline in which line is abbreviated ln. NoSuchMethodError:main is thrown, when you are trying to run one class without any main method. NoClassDefFoundError One of the places java tries to find your. Other than that just examine how your main method is constructed. In particular, the various Buffer subclasses now have a whole new family of covariant overrides, and there are new overloads of Math.
Date: Fri, 24 Jul 2009 05:56:46 -0700 From: java-l Groups. So will the following modifications will make the code work? You need to understand a thing, that Java programming language compiler javac takes your source file and translates its text into instructions that the Java virtual machine can understand. NoSucMethodError comes when Java code tries to call a method which is not existed on a class, this could be either. Google a hello world example and look at there main method if you are still unsure. There are various causes of this, at least one of which is that your class the original you specified could not have compiled successfully. Please publicize the proper use of --release if you get a chance. It looks as if you have the EchoLine.
Your original example code contains two errors: 1 System. ? If it does not find the method, then the jvm throws this error. Please make an effort to understand why this will solve the problem. Exception in thread main java. And I don't know where to find it. } } So the main reason of this error is when you tried to compile your program but the code starts to call a method but the method is not available there or not existed on the class and the method might be static or non-static that does not matter at all.
U havent specified the main method correctly i. As far as program is concerned, it is perfectly fine and will give output 5. If you try to run this file from command prompt, you will get the NoClassDefFoundError error. The instructions contained within this file are known as bytecodes. It's better to close this thread. I just ran your code and am still getting the same error. We tried different versions of java.
So before going to resolve it we would suggest you to understand the reason behind java. In Java 7, the error message is changed to make it more clear. We cant use more than one argument in this method. NoClassDefFoundError: EchoLine Caused by: java. Change the SimpleThread class from public to default 3. To fix this you have to figure out which. In order that the file persistence.