table of Contents
1. Error: Cannot find or load the main class
Run java+class name in the cmd command window.
First of all, you should ensure that the environment variables are configured. Use the java -version and javac -version commands. If no error is reported, it should be ok;
second, you should cd to the corresponding folder;
there are errors. The possible reasons are as follows:
Reason 1 : More added class suffix. . Such as
java helloworld.class
Direct java helloworld is fine;
reason two : The
helloworld code is as follows:
package project1;
public class helloworld {
public static void main(String[] args) {
System.out.println("helloworld!");
}
}
When programming with software such as eplise, there is a package xxx, which should be cd to the xxx directory, and then run:
java project1.helloworld
This generally works normally.