Scanner warning: Resource leak : <unassigned closeble value>

Question

I am reading a file and storing its content in a string. The code gives me a warning as : Resource leak : . How do i resolve it?

public static String JsonFileToString(String FileName)
{
    String FileContent=null;
    try {

        FileContent = new Scanner(new File("src/main/resources/" + FileName)).useDelimiter("\\Z").next();

    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }


    return FileContent;

}

Answer 1

You have to assign the Scanner to a variable, so you can close it in the finally block.

String FileContent=null;
        Scanner sc = null;
        try {

            sc = new Scanner(new File("src/main/resources/" + ""));
            FileContent = sc.useDelimiter("\\Z").next();


        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } finally {
            sc.close();
        }