Lỗi could not find or load main class phongtro.ui.newjframe netbeans năm 2024
The Java error “Could not find or load main class” is thrown when the JVM fails to find or load the main class while executing a program. This is often due to simple mistakes like typing the wrong class name or having the class file in the wrong place. It usually occurs when executing a Java program from the command line. Show Install the Rollbar Java SDK to identify and fix these errors What Causes "Error: Could not find or load main class"It typically arises from issues like an incorrect class name, a mismatch in the directory and package structure, or a misconfigured classpath. Here's a full list of things to check:
"Error: Could not find or load main class" ExampleHere’s an example of the Java "Could not find or load main class" error thrown when an incorrect class name is specified during execution: Say you have an example Java class
You then compile the above class using the command line:
The compiler generates an executable .class file for MyClass:
Now if the
The generated .class file has the exact same name as the Java class, which in this case is
How to Fix "Error: Could not find or load main class"Most of the time, the error occurs because of specifying an incorrect class name, class file extension, file path or classpath. Follow these tips to resolve it:
Track, Analyze and Manage Errors With RollbarManaging errors and exceptions in your code is challenging. It can make deploying production code an unnerving experience. Being able to track, analyze, and manage errors in real-time can help you to proceed with more confidence. Rollbar automates error monitoring and triaging, making fixing Java errors easier than ever. Sign Up Today! After running The SolutionThis error message usually means that you gave the wrong file (or no file) to If you run Click to Copy Error: Could not find or load main class thisfiledoesnotexist Caused by: java.lang.ClassNotFoundException: thisfiledoesnotexist A common cause of this error is passing in the public class HelloWorld { }0: Click to Copy public class HelloWorld { }When you run public class HelloWorld { }1, the file public class HelloWorld { }2 is produced, which is the compiled version of the program that you can execute. |