filedemo.java~12~

来自「java2参考大全上的例子的源码和自己的理解.」· JAVA~12~ 代码 · 共 47 行

package file方法;

/**
 File Name: COPYRIGHT.txt
 Path: java\COPYRIGHT.txt
 Abs Path: D:\JAVA Programe\File方法\java\COPYRIGHT.txt
 Parent: java
 exists
 is writeable
 is readable
 is not a directory
 is normal file
 is not absolute
 File last modified: 1110179708000
 File size: 54 Bytes
 大多数File方法是自说明的，但isFile( )和isAbsolute( )不是。isFile( )在被文件调用时返
回true，在被目录调用时返回false。并且，isFile( )被一些专用文件调用时返回false，例如设
备驱动程序和命名管道，所以该方法可用来判定文件是否作为文件执行。isAbsolute( )方法
在文件拥有绝对路径时返回true，若是相对路径则返回false。
 */

// Demonstrate File.
import java.io.File;

class FileDemo {
  static void p(String s) {
    System.out.println(s);
  }

  public static void main(String args[]) {
//    File f1 = new File("D:/JAVA Programe/File方法/java/COPYRIGHT.txt");
    File f1 = new File("java/COPYRIGHT.txt");
    p("File Name: " + f1.getName());
    p("Path: " + f1.getPath());
    p("Abs Path: " + f1.getAbsolutePath());
    p("Parent: " + f1.getParent());
    p(f1.exists() ? "exists" : "does not exist");
    p(f1.canWrite() ? "is writeable" : "is not writeable");
    p(f1.canRead() ? "is readable" : "is not readable");
    p("is " + (f1.isDirectory() ? "" : "not" + " a directory"));
    p(f1.isFile() ? "is normal file" : "might be a named pipe");
    p(f1.isAbsolute() ? "is absolute" : "is not absolute");
    p("File last modified: " + f1.lastModified());
    p("File size: " + f1.length() + " Bytes");
  }
}