When the application was installed, looked for java. Java Package Names Difference between Arraylist and Vector : Core Java Interview Collection Question ; Best Books for Learning Java; Amazon Interview Question : First Non repeated character in String Writing a source file name: Writing the source file name in the class name will prevent Java from identifying the class name. Eu queria saber se alguém sabe o porque deste erro no java 7. You specified incorrect class path for the application. Mudei para java 6 para testar e para minha surpresa funcionou. Maybe its empty or maybe it´s a wrong path and so on, the application cannot find java class. Solution But you can't select it. 2. D:\sample>java Calculator.class Error: Could not find or load main class Calculator.class Caused by: java.lang.ClassNotFoundException: Calculator.class Open the .bat file that run your aplication and look for a java_path. Bom pessoal, estava precisando gerar um jar executável aqui com o java 7, mas recebi mensagem “Could not find the main class”. So there is no need to provide the .class extension: $ java HelloWorld.class Error: Could not find or load main class HelloWorld.class. But to run a .class file, we need to provide the class name, not the file name. Error: Could not find or load main class sample.Main If you click on Configuration to set the Main class: (by default sample.Main is where main exists). Replace com.benohead.app.Main by the fully qualified name of your main class (the class containing the static main method to be executed). Make sure that there is a newline after the fully qualified name since it could make problems later on if it is missing. 4. Main-Class: com.benohead.app.Main. Desde já agradeço. Something like that: set JAVA_PATH=c:\Program Files\Java\jre1.6.0_07 It must be the same that java.exe is installed in. exe. So, again, let's run our program using the correct class name: $ java HelloWorld Hello world..!!! Inclusion of .class extension − While executing a file there is no need to include the .class extension in your program you just need to specify the name of the class file. The java command was not able to locate the class … The message ‘Could not find or load main class’ means that the first step of the Java engine fetching the class for execution has failed. E:\java-examples\src\com\howtodoinjava\core\basic> javac MainClass.java E:\java-examples\src\com\howtodoinjava\core\basic> java MainClass Error: Could not find or load main class MainClass 2. Even if you specify the class name in the right way, Java command may not be able to find the needed class.

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