file.java

由于想一次上传成功 所以将二个教程打包成了一个 这些例子几乎包含了所有java的框架集合

import java.io.File;

class file 
{
    public static void main(String args[]) 
    {
        File file1 = new File("file.txt");

        System.out.println("File: " + file1.getName() + (file1.isFile() ? 
            " is a file" : " is a named pipe"));
        System.out.println("Size: " + file1.length());
        System.out.println("Path: " + file1.getPath());
        System.out.println("Absolute Path: " + file1.getAbsolutePath());
        System.out.println("File was last modified: " + file1.lastModified());
        System.out.println(file1.exists() ? "File exists" : "File does not exist");
        System.out.println(file1.canRead() ? "File can be read from" : 
            "File cannot be read from");
        System.out.println(file1.canWrite() ? "File can be written to" : 
            "File cannot be written to");
        System.out.println(file1.isDirectory() ? "File is a directory" : 
            "File is not a directory");
    }
}