Unreported exception java.io.IOException when compiling Java code

Question

I am experiencing a problem with this code:

public class gravityv1 {
    public static double[] calculategravity(double[] mass, int[] diameter) {
        double[         


        

Answer 1

You need a try-catch block in your main method around all methods that throw an IOException:

try {
    printFile(gravity);
} catch (IOException ex) {
    // handle exception here
}

Include all methods that have throws IOException after the signature.

Answer 2

Change your main method declaration to:

public static void main(String[] args) throws IOException

In Java, each method A calling another method B, must declare all the exceptions
which B can throw (unless they are descendants of RuntimeException or unless A
is catching and processing them explicitly in a try-catch block).

In your case A is main, B is printFile.