Java method to determine whether it is a folder:
package com.tij.io.file;
import java.io.File;
/**
* 檢查File對(duì)象是文件還是目錄
* @author guoyoujun
* @date 2014-3-17
*/
public class CheckDirectoryOrFile {
/**
* java.io.File包含兩個(gè)方法：isFile(); isDirectory()
* <p>isFile();檢查改文件對(duì)象是否是普通文件,是則return true; 如果文件不存在或者是目錄則return false
* <p>isDirectory();檢查文件對(duì)象是否是目錄,是則return true; 如果目錄不存在或者是普通文件則return false
* <p>判斷之前應(yīng)該先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是目錄
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?falseisDirectory() 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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