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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
Updated on: 21-Apr-2020
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