System.getProperties()

System.getProperties()

import java.util.stream.Stream;

public class TestProperties {

    public static void main(String[] args) {
//        Object[] properties = System.getProperties().keySet().toArray();
//        for (Object value : properties) {
//            System.out.println(value + "  " + System.getProperty((String) value));
//        }
       
//        Stream.of(properties).forEach(value -> {
//            System.out.println(value + "  " + System.getProperty((String) value));
//        });
       
        Stream.of(System.getProperties().keySet().toArray()).forEach(value -> {
            System.out.println(value + "  " + System.getProperty((String) value));
        });
       
    }

}