try-catch-finally statement in Java exception handling
The try-catch-finally statement in exception handling includes three parts: try block: contains code that may throw exceptions. catch block: catches and handles specific types of exceptions. finally block: Code that is always executed regardless of whether an exception occurs, often used to release resources.
The try-catch-finally statement in Java exception handling
Exception handling is an important concept in Java programming. When an exception occurs in the program, we can use the try-catch-finally statement to handle the exception.
try-catch statement
try-catch statement is used to catch exceptions. The syntax is as follows:
try { // 可能会抛出异常的代码 } catch (ExceptionName e) { // 捕获异常并处理 }
try block contains code that may throw an exception. If an exception occurs within the try block, control is transferred to the catch block that matches the exception type.
finally statement
The finally statement is used for code that is always executed after the try-catch statement block has completed execution. The syntax is as follows:
try { // 可能会抛出异常的代码 } catch (ExceptionName e) { // 捕获异常并处理 } finally { // 在任何情况下都会执行的代码 }
finally The code in the block will be executed when:
- try block executes successfully without throwing an exception.
- The try block throws an exception, and the exception is caught by the catch block.
- The try block throws an exception, but there is no corresponding catch block to catch it.
Practical case
The following is an example of using the try-catch-finally statement to handle file read exceptions:
import java.io.File; import java.io.FileNotFoundException; import java.util.Scanner; public class FileRead { public static void main(String[] args) { File file = new File("file.txt"); try { Scanner scanner = new Scanner(file); while (scanner.hasNextLine()) { System.out.println(scanner.nextLine()); } } catch (FileNotFoundException e) { System.out.println("文件不存在!"); } finally { // 无论是否发生异常,都会关闭文件 scanner.close(); } } }
In this In the example, the try block attempts to read the contents of the file "file.txt". If the file does not exist, a FileNotFoundException exception is thrown and caught by the catch block. The finally block is always executed and is used to close the file.
The above is the detailed content of try-catch-finally statement in Java exception handling. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

Guide to Square Root in Java. Here we discuss how Square Root works in Java with example and its code implementation respectively.

Guide to Perfect Number in Java. Here we discuss the Definition, How to check Perfect number in Java?, examples with code implementation.

Guide to Random Number Generator in Java. Here we discuss Functions in Java with examples and two different Generators with ther examples.

Guide to Weka in Java. Here we discuss the Introduction, how to use weka java, the type of platform, and advantages with examples.

Guide to the Armstrong Number in Java. Here we discuss an introduction to Armstrong's number in java along with some of the code.

Guide to Smith Number in Java. Here we discuss the Definition, How to check smith number in Java? example with code implementation.

In this article, we have kept the most asked Java Spring Interview Questions with their detailed answers. So that you can crack the interview.

Java 8 introduces the Stream API, providing a powerful and expressive way to process data collections. However, a common question when using Stream is: How to break or return from a forEach operation? Traditional loops allow for early interruption or return, but Stream's forEach method does not directly support this method. This article will explain the reasons and explore alternative methods for implementing premature termination in Stream processing systems. Further reading: Java Stream API improvements Understand Stream forEach The forEach method is a terminal operation that performs one operation on each element in the Stream. Its design intention is
