import java.util.*;

        // Print out the complete set of System properties.
class ShowProperties {
    public static void main(String[] args){
        Properties props = System.getProperties();
        Enumeration propNames = props.propertyNames();
        while(propNames.hasMoreElements()){
            // Get the property name, which is the key.
            String name = (String) propNames.nextElement();
            // Look up its value in the properties.
            String value = props.getProperty(name);
            System.out.println(name+" = "+value);
        }
    }
}