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I have a Java Properties object that I load from an in-memory String , that was previously loaded into memory from the actual .properties file like this: this.propertyFilesCache.put(file, FileUtils.fileToString(propFile)); The util fileToString actually reads in the text from the file and the rest of the code stores it in a HashMap called propertyFilesCache . Later, I read the file text from the HashMap as a String and reload it into a Java Properties object like so: String propFileStr = this.propertyFilesCache.get(fileName); Properties tempProps = new Properties(); try { tempProps.load(new ByteArrayInputStream(propFileStr.getBytes())); } catch (Exception e) { log.debug(e.getMessage()); } tempProps.setProperty(prop, propVal); At this point, I've replaced my property in my in-memory property file and I want to get the text from the Properties object as if I was reading a File object like I did up above. Is there a simple way to do this or am I going to have to iterate over the properties and create the String manually?

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