How resolve could not find or load main class in spring boot?

How to fix the “Could Not Find or Load Main Class” Error

1. Wrong Extension. When running from the command line, many developers accidentally append an extension like: …
2. Wrong Location. Let’s say your class is part of a package like this: java com.myproject.MyClass.
3. Make sure your class path is correct.

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Then, can I run spring boot without main class?

Spring Boot main class start up the Spring ApplicationContext. When Spring boot application starts: If we define no main class, Spring Boot will search for the main class in the class path. It will fail, we there is no main class or we have multiple classes with the main method.

In this regard, how do I make a spring boot runnable jar?

How to create executable jar file in Spring Boot

1. Step 1: Configure packaging as jar. The packaging tag in the pom. …
2. Step 2: Configure maven plugin. …
3. Step 3: Configure jar file name. …
4. Step 4: Creating executable jar using maven. …
5. Step 5: Creating executable jar using STS. …
6. Step 6: Check in target folder. …
7. Step 7: Executing jar file.

How do you fix could not find or load main class?

Could Not Find or Load Main Class in Java

1. Reasons to Occur Error. The error generates because the JVM fails to load the main class or package name. …
2. Solution to the Error. To avoid or resolve the error, we need to specify the absolute package name or class name.
3. Without Package. …
4. With Package.

7 Related Question Answers Found

How do you fix the requested profile pom XML could not be activated because it does not exist?

I found the solution :

1. Step – 1 Right click on your project in Eclipse.
2. Step – 2 Click Properties.
3. Step – 3 Select Maven in the left hand side list.
4. Step – 4 You will notice “pom.xml” in the Active Maven Profiles text box on the right hand side. Clear it and click Apply.

How Do You Solve could not find or load main class in Eclipse?

Solution of Error: Could not find or load main class in Eclipse

1. Delete existing run configurations. When you run the main class as “Run as Java Program”, it adds the default classpath of the project as User entries into Run Configurations’s classpath as shown below. …
2. Check for missing library. …
3. Debug the Java program.

How do you write a main class in Java?

Java Class Methods

1. Example. Create a method named myMethod() in Main: public class Main { static void myMethod() { System. out. …
2. Example. Inside main , call myMethod() : public class Main { static void myMethod() { System. …
3. Main.java. public class Main { public void fullThrottle() { System. out. …
4. Second. java.

What does could not find or load main class main mean?

When you get the message “Could not find or load main class …”, that means that the first step has failed. The java command was not able to find the class. And indeed, the “…” in the message will be the fully qualified class name that java is looking for.

What is class not found exception in Java?

ClassNotFoundException is a checked exception which occurs when an application tries to load a class through its fully-qualified name and can not find its definition on the classpath. This occurs mainly when trying to load classes using Class. forName(), ClassLoader. loadClass() or ClassLoader.

Where is the main class in spring boot application?

A Spring Boot application’s main class is a class that contains a public static void main() method that starts up the Spring ApplicationContext. By default, if the main class isn’t explicitly specified, Spring will search for one in the classpath at compile time and fail to start if none or multiple of them are found.

Why do we need classpath in Java?

CLASSPATH: CLASSPATH is an environment variable which is used by Application ClassLoader to locate and load the . class files. The CLASSPATH defines the path, to find third-party and user-defined classes that are not extensions or part of Java platform. Include all the directories which contain .