Can someone explain what is this error? I am stuck

Question about the task

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om/codegym/task/task21/task2112/Solution.java:6: error: incompatible types: try-with-resources not applicable to variable type try (FakeConnection fakeConnection = dbConnectionManager.getFakeConnection()) ^ (com.codegym.task.task21.task2112.FakeConnection cannot be converted to java.lang.AutoCloseable)

In the FakeConnection class, implement the AutoCloseable interface so that FakeConnection objects can be used in try-with-resources blocks.
The close() method should display the phrase "Closing database connection..."
In the try block, call the usefulOperation() method and then the unsupportedOperation() method.

The screen output should be as follows:

Establishing database connection...
Entering body of try block.
Executing useful operation.
Operation is not supported yet!
Closing database connection...

Note that the resources were released automatically, despite the fact that an exception was thrown by the unsupportedOperation method.

Requirements:

The FakeConnection class must support the AutoCloseable interface.
The FakeConnection class's close method should display the phrase "Closing database connection...".
The Solution class's main method should call the usefulOperation and unsupportedOperation methods on a FakeConnection object.
The screen output must match the task conditions.
The FakeConnection class's close method should not be called explicitly.

package com.codegym.task.task21.task2112; public class Solution { public static void main(String[] args) { DBConnectionManager dbConnectionManager = new DBConnectionManager(); try (FakeConnection fakeConnection = dbConnectionManager.getFakeConnection()) { System.out.println("Entering body of try block."); usefulOperation(); unsupportedOperation(); } catch (Exception e) { } } }

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Nouser

Level 36 , Germany

4 March 2021, 17:58

AutoClosable is an interface already defined in java.lang That's why all the Reader, Writer, Input- and OutputStream classes can implement it. So just do the same here, let FakeConnection implement AutoCloseable but do not write an inner interface yourself

Josephine

Level 26 , Normal, United States

5 March 2021, 15:50

Thanks Nouser