How to declare multiple resources in a try-with-resources statement in Java 9?

Try-with-resources statement has been improved in Java 9. If we already have a resource that is final or equivalent to the final variable, then we can use that variable in a try-with-resources statement without having to declare a new variable in a try-with-resources statement.

We can declare multiple resources in a try block. Try initialization block can have any number of resources resulting in either null or non-null resources.

In the below example, we can able to declare multiple resources in the try-with-resources statement.

Example

import java.io.BufferedReader; import java.io.IOException; import java.io.Reader; import java.io.StringReader; public class MultipleResourcesTest {    public static void main(String args[]) throws IOException {       System.out.println(readData("test"));    }    static String readData(String message) throws IOException {       try(Reader inputString = new StringReader(message);       BufferedReader br = new BufferedReader(inputString)) {          return br.readLine();       }    } }

Output

test