[JAVA] Item 70: Use checked exceptions for recoverable conditions and runtime exceptions for programming errors

70. A programming error using a checked exception in a recoverable situation? Use run-time exceptions for

• As a guideline, exceptions that are output in situations where the caller can return are checked exceptions. Unchecked exceptions that cannot be restored.

• If it is not possible to determine whether or not recovery is possible, it should be a non-inspection exception. (Explaned in item71)

• The Error class is customarily output by the JVM when resources are scarce, and it is unlikely that a programmer will create a subclass of Error. Therefore, of the unchecked exceptions, only RuntimeException can be implemented.

• Do not define exceptions that directly inherit Throwables. There is no benefit to not inheriting checked exceptions and it confuses the user.