Q:

Java, write to file with headings

I have this method that takes one String and writes it to a file. I set the PrintWriter to true because I want to save all the data that is written to it.
I want to have headings on this file. How can I write the headlines to the file and only do it one time? 
My method looks like this:
public static void writeToFile(String text) {

    try {
        File f = new File("test.txt");
        FileWriter writer = new FileWriter("test", true); 
        writer.write(text);

        writer.close();
    } catch (IOException ex) {
        System.out.println(ex.getMessage());
    }
}

A:

It's not clear whether your file has multiple heading or not. Assuming your file has only one heading we can do this as follow -  
1. Since your file contain heading only one time, you can check whether the file is accessing for the first time  - 
File f = new File(//your file name);
if(f.exists() && !f.isDirectory()) {
  //write heading
}  

2. If the file is first time accessed then you can add a header - 
String heading = "Some heading";

The full code looks like - 
public static void writeToFile(String text) {

    String heading = "Some heading";

    try {
        File f = new File("test.txt");
        FileWriter writer = new FileWriter(f, true); 

        if(f.exists() && !f.isDirectory()) {
          writer.write(heading);
       } 

        writer.write(text);

    } catch (IOException ex) {
        System.out.println(ex.getMessage());
    }finally{
        writer.close();
    }
}

