Examples of java.util.Properties.store()

java.util.Properties.store()
Writes this property list (key and element pairs) in this Properties table to the output character stream in a format suitable for using the {@link #load(java.io.Reader) load(Reader)}method.
Properties from the defaults table of this Properties table (if any) are not written out by this method.
If the comments argument is not null, then an ASCII # character, the comments string, and a line separator are first written to the output stream. Thus, the comments can serve as an identifying comment. Any one of a line feed ('\n'), a carriage return ('\r'), or a carriage return followed immediately by a line feed in comments is replaced by a line separator generated by the Writer and if the next character in comments is not character # or character ! then an ASCII # is written out after that line separator.
Next, a comment line is always written, consisting of an ASCII # character, the current date and time (as if produced by the toString method of Date for the current time), and a line separator as generated by the Writer.
Then every entry in this Properties table is written out, one per line. For each entry the key string is written, then an ASCII =, then the associated element string. For the key, all space characters are written with a preceding \ character. For the element, leading space characters, but not embedded or trailing space characters, are written with a preceding \ character. The key and element characters #, !, =, and : are written with a preceding backslash to ensure that they are properly loaded.
After the entries have been written, the output stream is flushed. The output stream remains open after this method returns.
@param writer an output character stream writer. @param comments a description of the property list. @exception IOException if writing this property list to the specifiedoutput stream throws an IOException. @exception ClassCastException if this Properties objectcontains any keys or values that are not Strings. @exception NullPointerException if writer is null. @since 1.6

                properties.setProperty("hsqldb.nio_data_file", "true");
                properties.setProperty("hsqldb.default_table_type", "memory");
                properties.setProperty("hsqldb.lock_file", "false");
                properties.setProperty("hsqldb.log_size", "1000");


                properties.store(new FileOutputStream(file), "Default properties for the DC database of Data Crow.");
            }
        } catch (Exception e) {
            logger.error("Could not set the default database properties.", e);
        }
    }

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        users.setProperty("ftpserver.user.user3.userpassword", "");
        users.setProperty("ftpserver.user.user3.homedirectory", "home");


        FileOutputStream fos = new FileOutputStream(USERS_FILE);
        users.store(fos, null);


        fos.close();
    }


    @Override

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    public void testRefresh() throws FileNotFoundException, IOException {
      Properties users = new Properties();
      users.load(new FileInputStream(USERS_FILE));
      String originalSetting = users.getProperty("ftpserver.user.user1.homedirectory");
      users.setProperty("ftpserver.user.user1.homedirectory", "refresh_test");
      users.store(new FileOutputStream(USERS_FILE), null);
      
      PropertiesUserManager pum = (PropertiesUserManager) userManager;
      pum.refresh();
      User modifiedUser = pum.getUserByName("user1");
      assertEquals("Home directory should have been \"refresh_test\" after call to refresh().","refresh_test",modifiedUser.getHomeDirectory());

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      User modifiedUser = pum.getUserByName("user1");
      assertEquals("Home directory should have been \"refresh_test\" after call to refresh().","refresh_test",modifiedUser.getHomeDirectory());
      // set everything back again
      users.load(new FileInputStream(USERS_FILE));
      users.setProperty("ftpserver.user.user1.homedirectory", originalSetting);
      users.store(new FileOutputStream(USERS_FILE), null);
      
      pum.refresh();
      //check everything is back again
      modifiedUser = pum.getUserByName("user1");
      assertEquals("Home directory should have reset back to \""+originalSetting+"\" after second call to refresh().",originalSetting,modifiedUser.getHomeDirectory());

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    try
    {
      final OutputStream out = new BufferedOutputStream(new FileOutputStream(target));
      try
      {
        properties.store(out, FileConfigStorage.CONFIGHEADER);
      }
      finally
      {
        out.close();
      }

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        for (Conversion conversion : conversions) {
            properties.put(String.valueOf(count), conversion.toString());
        }
        
        try {
            properties.store(new FileOutputStream(new File(filename)), "");
        } catch (IOException e) {
            logger.error("Failed to persist database column conversion scripts", e);
        }            
    }
}

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                properties.setProperty(setting.getKey(), setting.getValueAsString());
        }


        try {
            FileOutputStream fos = new FileOutputStream(settings.getSettingsFile());
            properties.store(fos, "");
            fos.close();
        } catch (Exception e) {
            logger.error("Could not save settings to file " + settings.getSettingsFile(), e);
        } 
    }

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                File parentDir = new File(propFile.getParent());
                parentDir.mkdirs();


                propFile.createNewFile();
                FileOutputStream fos = new FileOutputStream(propFile);
                props.store(fos, "I18N Resource File");
                fos.close();
            } catch (FileNotFoundException fnfe) {
                fnfe.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();

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            // write new values
            FileOutputStream fileOut = null;
            try {
                fileOut = new FileOutputStream(new File("DATA/SETTINGS/profile.txt"));
                profile.store(fileOut , null );


                // generate a news message
                final Properties news = profile;
                news.remove("comment");
                sb.peers.newsPool.publishMyNews(sb.peers.mySeed(), yacyNewsPool.CATEGORY_PROFILE_UPDATE, news);

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   // retrieve property
   Properties properties = getProperties();


   // try to save to the original loading place
   OutputStream out = new FileOutputStream(saveFile);
   properties.store(out, "JUtils property file, including system properties");
   out.close();
   System.out.println("Property: Done.");


}

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