code: package com.fdu.se.sootanalyze.utils;
  
  import java.io.FileNotFoundException;
  import java.io.IOException;
  import java.util.Properties;
  
  public class LoadProperties {
      private static Properties properties;
  
      private LoadProperties() {
      }
  
      public static Properties getInstance() {
          if (properties != null)
              return properties;
          try {
              properties = new Properties();
              properties.load(LoadProperties.class.getResourceAsStream("/config.properties"));
          } catch (FileNotFoundException e) {
              e.printStackTrace();
          } catch (IOException e) {
              e.printStackTrace();
          }
          return properties;
      }
  
      public static String get(String key){
          if(properties != null)
              return properties.getProperty(key);
          else
              return getInstance().getProperty(key);
      }
  }
  