Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Java Local Development Environments How it Works The Java Virtual Machine

Andrey Serebryanskiy
Andrey Serebryanskiy
5,756 Points

Could not find or load main class Systemizer

After successful compilation when trying to launch a program by command Java Systemizer (or even Java com.teamtreehous e.Systemizer) it throws an error "Could not find or load main class Systemizer".

Command ls shows that there are two files in the current directory: Systemizer.class Systemizer.java

What is going on? Can somebody help me with this issue?

My code is:

package com.teamtreehouse;

import java.util.Set;
import java.util.TreeSet;

public class Systemizer {

  public static void main(String[] args) {
    Set<String> propNames = new TreeSet<String>(System.getProperties().stringPropertyNames());
    for (String propertyName : propNames) {
      System.out.printf("%s is %s  %n",
                        propertyName,
                        System.getProperty(propertyName));
    }
  }
}

1 Answer

Gonzalo Torres del Fierro
PLUS
Gonzalo Torres del Fierro
Courses Plus Student 16,751 Points

hello are you trying this?

clear && javac Systemizer.java && java Systemizer

must work