The execution program in eclipse shows that the main class could not be found

The execution program in eclipse shows that the main class could not be found

This typically occurs in a Java file that has a class file already compiled in the project, and there is no problem with the new Java that is created later. This situation indicates that the corresponding class file in the project Bin directory does not exist or is corrupted, and the fix can solve the problem.

1 enter src corresponding directory, in the background with Java command directly compiled such as Javac Test.java. The calling class also requires manual one by one compilation.

2 Copy the compiled class file to the corresponding directory in the project Bin directory.

3 run directly in Eclipse.