Why am i getting an error while instantiating within try with resources clause?

Question

Here is the code which is giving the error -

try(StringWriter stringWriter = new StringWriter()) {

IDE is complaining as Unhandled exception from auto-closeable resource:java.io.IOException Is it necessary to pass something in the constructor here ?

Answer 1

Because the close method (in StringWriter) is declared as:

public void close() throws IOException

And your try-with-resources will automatically call it.

Answer 2

Add the catch block;

try(StringWriter stringWriter = new StringWriter()) {

      //Do something
} catch(IOException e){

      e.printStackTrace();
}