Error: Could not find or load main class cp.A Caused by: java.lang.ClassNotFoundException: code example

Example 1: Error: Could not find or load main class mina.calc.MinaCalculator in module mina

//You must change your class name

Example 2: > Task :run FAILED Error: Could not find or load main class Caused by: java.lang.ClassNotFoundException:

Check your build.gradle file and update the application block:

application {
    // Define the main class for the application.
  	// insert the entire name of the class
    mainClassName = 'packageName.MainClass'
}