小编Ama*_*mal的帖子

以下两种创建文件的方法有什么区别？

new File(System.getProperty("user.dir"));
new File("");

Java将第一个标识为目录,第二个标识既不是文件也不是目录!为什么会这样？

码:

public class MainClass {
    public static void main(String[] args) throws Exception {       
        System.out.println("File Created with CurrentDir taken From System Props");
        File f1 = new File(System.getProperty("user.dir"));
        System.out.println("Absolute Path: " + f1.getAbsolutePath());
        System.out.println("isDirectory: " + f1.isDirectory());
        System.out.println("isFile: " + f1.isFile());

        System.out.println();

        System.out.println("File Created with Empty String Path");
        File f2 = new File("");
        System.out.println("Absolute Path: " + f2.getAbsolutePath());
        System.out.println("isdirectory: " + f2.isDirectory());
        System.out.println("isFile: " + f2.isFile());       
    }
}

输出:

File Created with CurrentDir taken …