How to determine whether it is a folder in java

Java method to determine whether it is a folder:

package com.tij.io.file;

import java.io.File;

/**
 * 检查File对象是文件还是目录
 * @author guoyoujun
 * @date 2014-3-17
 */
public class CheckDirectoryOrFile {

	/**
	 * java.io.File包含两个方法：isFile(); isDirectory()
	 * <p>isFile();检查改文件对象是否是普通文件,是则return true; 如果文件不存在或者是目录则return false
	 * <p>isDirectory();检查文件对象是否是目录,是则return true; 如果目录不存在或者是普通文件则return false
	 * <p>判断之前应该先exists();
	 * @param args
	 */
	public static void main(String[] args) {
		File file = new File("/Users/GYJ/java1.txt");
		File dir = new File("/Users/GYJ/funshion");
		File notExists = new File("/Users/GYJ/notafile");
		//java1.txt文件存在
		System.out.println("/Users/GYJ/java1.txt is file?" + file.isFile());
		System.out.println("/Users/GYJ/java1.txt is dir?" + file.isDirectory());
		//funshion是目录
		System.out.println("/Users/GYJ/funshion is file?" + dir.isFile());
		System.out.println("/Users/GYJ/funshion is dir?" + dir.isDirectory());
		//notafile不存在
		System.out.println("/Users/GYJ/notafile is file?" + notExists.isFile());
		System.out.println("/Users/GYJ/notafile is dir?" + notExists.isDirectory());
	}

}

out put==========
/Users/GYJ/java1.txt is file?true
/Users/GYJ/java1.txt is dir?false
/Users/GYJ/funshion is file?false
/Users/GYJ/funshion is dir?true
/Users/GYJ/notafile is file?false
/Users/GYJ/notafile is dir?false

isDirectory() in java is to check whether an object is a folder. The return value is of boolean type. Returns true if so, false otherwise.

The calling method is: object.isDirectory() without specifying parameters.

The java.nio.file package defines the interfaces and classes for the Java virtual machine to access files, file attributes and file systems. This API can be used to overcome many limitations of the java.io.File class. The toPath method can be used to obtain a Path that uses an abstract path represented by a File object to locate a file.

The generated Path can be used with the Files class to provide more efficient and broader access to other file operations, file properties, and I/O exceptions to help diagnose errors when a file operation fails.

For more java knowledge, please pay attention to java basic tutorial.

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