Chapter 11: Problem 14

When are you required to have a throws clause in a method header?

Short Answer

Expert verified

Answer: A throws clause is necessary in a method header in the following scenarios: 1. When your method is using a method that declares a checked exception and your method is not handling the exception using a try-catch block. In this case, you must declare the exception in the throws clause. 2. When your method explicitly throws a checked exception, you should include the throws clause in the method header.

Step by step solution

Understand Java Exception Handling

Exception handling is a way to handle runtime errors in Java. Exceptions are events that can disturb the normal flow of a program. Handling exceptions helps to maintain the normal flow of the program in case an error occurs.

Types of Exceptions

In Java, exceptions can be divided into two main categories: 1. Checked exceptions: These are exceptions that the compiler forces you to handle at compile time. If you do not handle them, the code will not compile. 2. Unchecked exceptions: These are exceptions that the compiler does not force you to handle at compile time. They occur during runtime.

Understand The Throws Clause

A throws clause is a Java statement that specifies which exceptions a method may throw. It includes the word 'throws' followed by the exception class names. The throws clause is placed right after the method signature before the method body begins.

When to Add Throws Clause to Method Header

You are required to add a throws clause to the method header in the following scenarios: 1. When your method is using a method that declares a checked exception and your method is not handling the exception using a try-catch block. In this case, you must declare the exception in the throws clause. 2. When your method explicitly throws a checked exception, you should include the throws clause in the method header. Remember that it's not necessary to add a throws clause for unchecked exceptions in the method header because the compiler does not enforce their handling at compile time.

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When are you required to have a throws clause in a method header?

Short Answer

Step by step solution

Understand Java Exception Handling

Types of Exceptions

Understand The Throws Clause

When to Add Throws Clause to Method Header

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