Java determines whether a file directory exists

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

The calling method is: object.isDirectory() without specifying parameters. (Recommended Learning: Java Course )

In the disk system of this machine, find a folder, use the File class provision method, list the folder to list the folder The file names and paths of all files in the file, the execution effect is as follows:

The files in the folder whose path is xxx are:

File name: abc.txt

Path name: c:\temp\abc.txt

File name: def.txt

Path name: c:\temp\def.txt

import java.io.File;
public class Test1 {
    public static void main(String[] args) {
    // 创建File对象
    File f = new File(“G:\java”);
    // 判断File对象是不是目录
        if (f.isDirectory()) {
            String[] files = f.list();
            if (null != files && files.length > 0) {
                // 遍历数组,显示目录中文件列表
                for (String file : files) {
                    System.out.println(file);
                    System.out.println("------------");
                    System.out.println(“文件的路径为” + f.getPath());
                }
            }
        }
    }
}

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