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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",

1 Answer

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

hello are you trying this?

clear && javac Systemizer.java && java Systemizer

must work