import java.util.Map;
 
public class Getenv{
    public static void main(String args[]){
        for (Map.Entry<String, String> env : System.getenv().entrySet()) {
            System.out.println(env.getKey() + " : " + env.getValue());
        }
    }
}

import org.apache.commons.lang.builder.ToStringBuilder;
 
public class VarDump{
    public static void main(String args[]){
        System.out.println(ToStringBuilder.reflectionToString(args));
    }
}

public class PropertyFile{
    public static void main(String args[]){
        try {
            java.util.Properties prop = new java.util.Properties();
            prop.load(new java.io.FileInputStream("application.ini"));
            for (String propertyName : prop.stringPropertyNames()) {
                System.out.println(propertyName);
                System.out.println(prop.getProperty(propertyName));
            }
        } catch (Exception e){
            e.printStackTrace();
        }
    }
}

hoge=fuga
hello=world