import java.util.*;

public class TestSystemVars {
    
    public static final String SYSTEM_ENV_PREFIX = "Env-"; // NOI18N
    
    /**
     * Get just the system environment variables.
     */
    public static Map getSystemEnvVars() {
        Map systemEnvVariables;
        /*
        if (systemEnvVariables == null) {
            synchronized (systemEnvVariablesLock) {
                if (systemEnvVariables == null) {
         */
                    systemEnvVariables = new HashMap();
                    System.out.println("Have environment variables:");
                    for (Enumeration enum = System.getProperties().propertyNames(); enum.hasMoreElements(); ) {
                        String key = (String) enum.nextElement();
                        if (key.startsWith(SYSTEM_ENV_PREFIX)) {
                            String value = (String) System.getProperty(key);
                            if (value != null) {
                                systemEnvVariables.put(key.substring(SYSTEM_ENV_PREFIX.length()), value);
                                System.out.println("NAME = '"+key.substring(SYSTEM_ENV_PREFIX.length())+"', VALUE = '"+value+"'");
                            }
                        }
                    }
                    /*
                }
            }
        }
                     */
        return systemEnvVariables;
    }
 
    public static void main(String[] args) {
        getSystemEnvVars();
    }
}