search
HomeJavaJavaBaseHow to determine whether a file folder exists in java (code attached)

How to determine whether a file folder exists in java (code attached)

1、判断文件夹是否存在,不存在则创建:(java相关视频教程推荐:java视频教程

File folder = new File("d:\\test1\\test2");
if (!folder.exists() && !folder.isDirectory()) {
    folder.mkdirs();
    System.out.println("创建文件夹");
} else {
    System.out.println("文件夹已存在");
}

public boolean exists()测试此抽象路径名表示的文件或目录是否存在,返回:当且仅当此抽象路径名表示的文件或目录存在时,返回true;否则返回false。

java中的isDirectory()是检查一个对象是否是文件夹。返回值是boolean类型的。如果是则返回true,否则返回false。

调用方法为:对象.isDirectory() 无需指定参数。

2、判断文件是否存在,不存在则创建

File file = new File("d:\\test.txt");
if (!file.exists()) {
    try {
        file.createNewFile();
    } catch (IOException e) {
        e.printStackTrace();
    }
    System.out.println("文件已创建");
} else {
    System.out.println("文件已存在");
}

更多java相关文章请关注java基础教程栏目。

The above is the detailed content of How to determine whether a file folder exists in java (code attached). For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Chat Commands and How to Use Them
1 months agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft