java.util.Properties

import java.util.*;

class PropertiesTest{
    public static void main(String args[]){
        Properties properties = new Properties();

        // 値の設定：setProperty
        properties.setProperty("color", "RED");
        properties.setProperty("font", "BOLD");

        // 値の取得：getProperty
        System.out.println("color : " + properties.getProperty("color"));
        System.out.println("font  : " + properties.getProperty("font"));
    }
}

color : RED
font  : BOLD