当我只能使用打印方法时，为什么打印机通常与FileOutputStream一起使用

Question

如果我可以这样做：

PrintWriter pw = new PrintWriter("file.txt");
pw.println("Hello");

.

为什么PW经常像这样使用：

PrintWriter pw = new PrintWriter(new FileOutputStream("file.txt"));
pw.println("Hello");

.

有什么区别？

Answer 1

The PrintWriter constructors that accept a file name or a java.io.File are relatively new; they were added in JDK 1.5. The FileOutputStream or FileWriter version used to be the only alternative; a lot of people don't even know about the new constructors in PrintWriter.