Question

public class ApplicationException extends Exception 
{
    private static final long serialVersionUID = 1L;

    public ApplicationException()
    {
        super();
    }

    public ApplicationException(String message)
    {
        super(message);
    }
}

public class Utilities 
{
    public static byte[] ParseHehadecimalString(String s)    // error 1
    {
        throw new ApplicationException("ParseHehadecimalString not implemented");
    }
}

public class Client extends Activity {
{
    public void OnBtnSendClick(View v)
    {
        String s = et_client_out.getText().toString();
        byte[] bytes;

        try
        {
            bytes = Utilities.ParseHehadecimalString(s);
        }
        catch(ApplicationException ex)    // error 2
        {
            Toast.makeText(getApplicationContext(), ex.getMessage(), Toast.LENGTH_SHORT).show();
            return;
       }
}

Error 1: Unhandled exception type ApplicationException

Error 2: Unreachable catch block for ApplicationException. This exception is never thrown from the try statement body

How this can be fixed?

Answer 1

error 1 needs to look like

public static byte[] ParseHehadecimalString(String s) throws ApplicationException {

error 2 does not through this exception because of error 1. Once error 1 is fixed errror 2 will disappear

This link describes how to add exceptions to method signatures.