试图创建没有成功的文件 - 文件出现在其他地方?

时间:2013-09-08 10:09:42

标签: java writer

我尝试在我的主目录中创建3个空文件,使用:

     this.mainpath = System.getenv("HOME"+"/");
     this.single = new File(mainpath + "sin.r");
     this.complete = new File (mainpath + "com.r");
     this.ward = new File (mainpath+"w.r");

我的印象是,这会给我所需的文件。但是,如果我搜索我的主目录或任何其他目录,这些文件都不存在。我做错了什么?

编辑:我发现:我确实得到了一个文件,但不是在我的主目录中,但它的路径是/home/myname/NetBeansProjects/myorojectname/nullsin.r。

但是,我特意想在家中创建文件!

好吧,我的代码现在写着:

this.mainpath = System.getenv("user.home");
        this.mainpath = this.mainpath + "/";
         this.single = new File(mainpath + "sin.r");
         this.single.createNewFile();
         System.out.println(this.single.getAbsolutePath());
         this.complete = new File (mainpath + "comp.r");
         this.complete.createNewFile();
         this.ward = new File (mainpath+"w.r");
         this.ward.createNewFile();

"成功"然而,这是我在第一个createNeWFile()得到一个IOException:找不到文件。

至于我的代码我是如何尝试将这些文件写入这些文件的,它是:

     FileWriter writer1 = null;
    FileWriter writer2 = null;
    FileWriter writer3 = null;

    try {
         writer1 = new FileWriter(single);
         writer2 = new FileWriter(complete);
         writer3 = new FileWriter(ward);

         writer1.write("x = cbind(1,2,3)");
         writer2.write("x = cbind(1,2,3)");
         writer3.write("x = cbind(1,2,3)");
         writer1.flush();
         writer2.flush();
         writer3.flush();
    } catch (IOException ex) {
        System.out.println(ex.getStackTrace());

    } finally {
        try {
            writer1.close();
            writer2.close();
            writer3.close();
        } catch (IOException ex) {
            System.out.println(ex.getStackTrace());

        }

2 个答案:

答案 0 :(得分:3)

您需要使用getProperty()代替

System.getProperty("user.home");

此外,在获取目录路径后应附加/

this.mainpath = System.getProperty("user.home");
this.single = new File(mainpath + "/sin.r");
this.complete = new File (mainpath + "/com.r");
this.ward = new File (mainpath+"/w.r");

答案 1 :(得分:1)

您可以为您声明实际创建它们的每个对象调用“createNewFile”方法。