Java：FileWriter：创建一个新行 [英] Java: FileWriter: Create a new line

问题描述

我做了一个小文件编写器：

I've made a little file writer:

    try {
        FileWriter writer = new FileWriter(new File("file.txt"), false);
        try {
            String sizeX = jTextField1.getText();
            String sizeY = jTextField2.getText();
            writer.write(sizeX);
            writer.write(sizeY);
            writer.flush();
            writer.close();
        } catch (NumberFormatException e) {
        }
    } catch (IOException ex) {
    }

现在我想创建一个新行，就像你通常可以使用\ n一样，但它似乎不起作用......

Now I want to make a new line, just like you can do it with "\n" normally, but it doesn't seem to work...

有谁知道怎么做这么新的一行？

Does anyone know how to make such a new line?

提前致谢！ ：）

推荐答案

如果你想获得当前操作系统中使用的新行字符，如 \\\\ n 对于Windows，你可以通过

If you want to get new line characters used in current OS like \r\n for Windows, you can get them by

• System.getProperty（line.separator）;


• ，因为Java7 System.lineSeparator（）


• 或如Stewart所述，通过 String.format（％n）生成它们;

• System.getProperty("line.separator");
• since Java7 System.lineSeparator()
• or as mentioned by Stewart generate them via String.format("%n");

您还可以使用 PrintStream 及其 println 自动在字符串末尾添加OS依赖行分隔符的方法

You can also use PrintStream and its println method which will add OS dependent line separator at the end of your string automatically

PrintStream fileStream = new PrintStream(new File("file.txt"));
fileStream.println("your data");
//         ^^^^^^^ will add OS line separator after data 

（ BTW System.out 也是PrintStream的实例。

(BTW System.out is also instance of PrintStream).

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