java error could not find or load main class

Under Linux wrote a very simple Hello world program, compile run unexpectedly error: Error:could not find or Load main class HelloThe last discovery is the classpath problem.First, check that the JDK environment variable is configured correctly: Refer to this article: ubuntu12.04 installation configuration jdk1.7Mainly

need to set the default output folder below, where you set your output path as the class path.5.Right-click Properties inside the builder inside the project's Builder.xml reference (import) come in.6.The right-click Properties in the Java Builder path libraries All Delete, especially the JRE, and then, click Save, Close Eclipse, then open, and then the corresponding JRE and lib below the relevant jar intro

Workaround:gradlewis the Gradle wrapper executable-batch script on Windows and shell script elsewhere. If you include the following lines in your build.gradle ,task wrapper(type: Wrapper) { gradleVersion = ‘2.0‘}A gradle wrapper script is added to your source folders. The wrapper script when invoked, downloads the defined Gradle version, and executes it. By distributing the wrapper with your project, anyone can work with it without needing to install Gradle beforehand. Even better, the users

Under Linux wrote a very easy Hello world program, compile execution unexpectedly error: Error:could not find or Load main class HelloThe last discovery is the classpath problem.The first thing to check is whether the JDK environment variable is configured correctly: see this article: ubuntu12.04 installation configura

When the JDK is installed or when the JDK was previously installed, the Java file was not found or could not be loaded with Javac when the main class Com.sun.tools.javac.Main, this problem, the Internet is generally said that the environment variable configuration is wrong, this is not true, generally speaking, if your environment is properly configured to have T

If the code is not a problemSimple and Crude solution:Restart your computerWorkaround 2:1. In the console, click "Problems" to see the errors inside. If you have multiple projects, you can temporarily close other projects.Handled according to the error.2. Clean the project3. Refresh the projectRight-click on the project to refreshIf it doesn't work,4. (Key Step)Delete the compiled configuration information or the corresponding. class file for the newl

In linux, I wrote a very simple Hello world Program. When compiling and running the program, an Error occurs: Error: cocould not find or load main class Hello. The CLASSPATH problem was found at last. First, check whether the jdk environment variables are correctly configured. Refer to this article: ubuntu12.04 insta

After starting HDFs, execute the share directory with the MapReduce program times below errorLocate $hadoop_home/etc/mapred-site.xml and add the following configuration1 2 3 4 5 6 7 8 9 Hadoop 3.1.1 Could not find or Load main class Org.apache.hadoop.mapreduce.v2.app.MRAppMaster

Java cmd configuration (that is, Java JDK configuration and related common commands)-solution for failing to find or loading the main class, cmdjdk Java cmd configuration (that is, Java

Problem 1:javac not internal or external commandsIssue 2: The main class cannot be found or cannot be loaded * * *Both of these issues are related to the configuration of the JDK, one is the path and the other is classpath. Path: Where to find the tools to compile or run (must be set), Classpath: Where to find the

prompted not to find the main class. Therefore, it can be inferred that the main class was found through a path in the paths. But how does this explain the first case?Three650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/83/3D/wKioL1dtd1jiVbgCAAA8IONlhdQ287.png "t

Java hit jar package exception one: Could not find the main Class,java.lang.unsupportedclassversionerror:bad version numb. Reason: JDK version conflict problem Reference articles: Http://jn3.141592654.blog.163.com/blog/static/27477260201031285943166/?hasChannelAdminPriv=true A section of code that works properly in JC

In command line mode: C:\Documents and Settings\hui.qian>d: d:\>cd D:\java\serializable D:\java\serializable>javac Test.java D:\java\serializable>java Test Error: Main class test could not be found or loaded d:\

Eclipse runs a Java program with a sudden error: there is no or cannot find the main class.On the internet to find a lot of ways, can not.JDK Environment configuration--this generally does not go wrong, because this is not the case before.See what the project is configured for--and that's useless, because it was all ri

Java cannot find the main class solutionIf the Java class has a package name, you must build the appropriate package folder and compile or copy the file to the appropriate folder;As follows:1. source file: E:\test\src\test\hello.j

If you write some class, compile into a jar, but in the execution of this jar error, can not find the main class, but you obviously have, is not very depressed, check your jar bar.Unzip your jar, open meta-inf This folder, open MANIFEST.MF This file (this is a text), see if there is no

Sometimes, when testing a class, eclipse can be a strange reminder that you can't find the main class. Next there are several workarounds1. On the project, right click on the > Builder path, Configure Build path, select the source panel and click Add Folder to add the upper directory of the package path where the sourc

21. Write a Java application that consists of 3 classes: The Monkey class, the People class, and the main classE. Requirements:(1) There is a construction method in the Monkey class: Monkey (String s), and there is a public void speak ()method to output the message "babbling

In Java, there are two ways in which a class can invoke another class by instantiating the class, invoking the method of instantiating the object, and invoking it using the Java mapping mechanism. The first method is no longer explained, and the second method uses the follow

. nativemethodaccessorimpl. Invoke (unknown source)At sun. Reflect. delegatingmethodaccessorimpl. Invoke (unknown source)At java. Lang. Reflect. method. Invoke (unknown source)At org. Apache. Catalina. startup. Bootstrap. Start (Bootstrap. Java: 287)At org. Apache. Catalina. startup. Bootstrap. Main (Bootstrap. Java: 4