在控制台上的 Windows 上用 java 打印回车

Question

On my OS X machine, the following line gives me a nice and easy way to track the state of my loops:

for (int index = 0; index < 100; index++)
    for (int subIndex = index; subIndex < 100; subIndex++)
        System.out.print("\r" + index + "/" + subIndex + "       ");

But when I try to run the same thing on windows, it prints out newlines instead of a carriage return. How can I achieve the same simple method of tracking the process on windows?

Answer 1

I had the statement and it worked in the command prompt

System.out.println("This is Java"+'\r'+"That");

and gives me output as

That is Java

That means it works perfectly.

Note: I run it in Windows 7 with JDK 7 and simple notepad.

It is the problem of eclipse, it will take \\r as a new line character and will print

This is Java
That

as output

Answer 2

如果您使用的是 Eclipse，则必须在控制台窗口中启用控制字符选项。

Answer 3

By "Windows" you mean cmd.exe ? And you want to overwrite to the line you previously output, right? Unfortunately I think you need to invoke this Win32 API somehow in order to achieve it

• SetConsoleCursorPosition
  • Cf.Calling Win32 API method from Java

Maybe other Java gurus can provide better answer ...