Try with Resources in Java

Last Updated: 06 March, 2023

Until Java 1.6, it is strongly advised to use the finally block to close resources explicitly that were opened as part of the try block.

The following problems arise from this approach:

A programmer is required to close the resources inside the finally block explicitly. It increases the complexity of programming.

To close the resources, programmers must write the final block, which increases the code's length.

To overcome these problems, Java introduced try-with-resources in its 1.7 version.

The try-with-resources statement automatically closes all the resources that were opened as a part of the try block once control reaches the end of the try block, either normally or abnormally.

Hence, we are not required to write a "finally block" to close the resource explicitly so that the length of the code will be reduced.

We can pass any object that implements java.lang.AutoCloseable interface, which includes all objects that implement java.io.Closeable interface.

Let's see the Syntax:

  try (resource declaration) {
    // use resource
  } catch (ExceptionType ex) {
    // handle exception
  }

Example of try-with-resources in Java

  
  import java.io.BufferedReader;
  import java.io.FileReader;
  import java.io.IOException;
  public class Example {
    public static void main(String[] args) {
      String line;
      try (BufferedReader br = new BufferedReader(new FileReader("studentRecord.txt"))) {
        while ((line = br.readLine()) != null) {
          System.out.println(line);
        }
      } catch (IOException e) {
        System.out.println("IOException error occured: " + e.getMessage());
      }
    }
  }

Output

Name: Suresh, Roll: 21, Class: LKG

Try with Resources in Java

Currently No Video available