There are several possible reasons why Java commands in different packages might not be working as expected. Some common causes include:
Incorrect package names: If you are trying to use a class from a different package, make sure that you are using the correct package name and import statement. Incorrect package names can cause the compiler to report errors or the program to fail at runtime.
Classpath issues: The Java classpath is a list of directories and JAR files that the Java runtime uses to search for class files. If you are trying to use a class from a different package, make sure that the classpath is set correctly and includes the directories or JAR files containing the class files.
Security restrictions: Some Java commands, such as those that access system resources or perform network operations, may be restricted by security policies. If you are trying to use such commands and they are not working as expected, check the security policies of your Java runtime or application server to see if they are causing the issue.
Syntax errors: Make sure that you are using the correct syntax for the Java commands you are trying to use. Incorrect syntax can cause the compiler to report errors or the program to fail at runtime.
Logical errors: Make sure that you are using the Java commands correctly and in the appropriate context. Logical errors can cause the program to behave unexpectedly or produce incorrect results.
I hope this helps! If you are still having issues with Java commands in different packages, please provide more information about the specific commands and error messages you are seeing, and I will do my best to assist you further.