Java I/O question

Write a Java method writeFile() that takes a double, another double and an integer as parameters and writes the values of the parameters to a file in the same order mentioned above. In Coderunner, the file is hidden from you and is instead made available to you via an Outputstream object referenced by the ostream instance variable in the class in which your method will be placed. Use this object instead of Files.newOutputstream(Path.get("...")); to write to the file