将控制台输出的数字写入文本文件

quick question, I don't know what I'm missing here. If I have a console output of 9 numbers in a row, and 9 total rows, how would I go about writing that exact output to an external text file, so it looks the same way in the text file.

快速问题，我不知道我在这里缺少什么。如果我有一个连续9个数字的控制台输出，总共9行，我将如何将该确切输出写入外部文本文件，因此它在文本文件中的外观相同。

Assuming the console looks like this:

假设控制台看起来像这样：

2 4 5 1 9 3 6 8 7 
9 7 6 2 5 8 4 1 3 
1 8 3 7 4 6 9 2 5 
8 5 2 3 1 9 7 4 6 
3 1 9 4 6 7 8 5 2 
7 6 4 5 8 2 3 9 1 
4 3 8 6 2 5 1 7 9 
5 9 7 8 3 1 2 6 4 
6 2 1 9 7 4 5 3 8

And that console output is stored in an array variable named "myArray" How would I write it to a text file so it looks just like that (or separated by commas)

并且该控制台输出存储在名为“myArray”的数组变量中。如何将其写入文本文件，使其看起来就像那样（或用逗号分隔）

So far I have this:

到目前为止我有这个：

File solutionFile = new File("output.txt");
FileOutputStream stream = new FileOutputStream(solutionFile);
PrintStream writeOut = new PrintStream(stream);
System.setOut(writeOut);

for (int rows = 0; rows < 9; rows++) {
  for (int columns = 0; columns < 9; columns++) {
    System.out.println(myArray[rows][columns] + " ");
  }
}

When it writes to the file, each number is placed on its own line. Any assistance possible? Thank you!

当它写入文件时，每个数字都放在它自己的行上。有可能吗？谢谢！

3 个解决方案

#1

Don't make the print statement a println, just a print.

不要使print语句成为println，只是打印。

for (int rows = 0; rows < 9; rows++) {
  for (int columns = 0; columns < 9; columns++) {
    System.out.print(myArray[rows][columns] + " ");    //keep printing on the same line
  }
  System.out.println();    //go to the next line
}

Another thing you could do is I/O redirection. If you run the program via terminal or command prompt, you can type java MyProgram > outputFile.txt. The > redirects the console output to go to outputFile.txt instead of where it normally goes.

您可以做的另一件事是I / O重定向。如果通过终端或命令提示符运行程序，则可以键入java MyProgram> outputFile.txt。 >重定向控制台输出以转到outputFile.txt而不是通常的位置。

#2

Use following code (instead of println use just pring and call println() after second for)

使用以下代码（而不是println只使用pring并在第二次之后调用println（））

File solutionFile = new File("output.txt");
FileOutputStream stream = new FileOutputStream(solutionFile);
PrintStream writeOut = new PrintStream(stream);
System.setOut(writeOut);

for (int rows = 0; rows < 9; rows++) {
  for (int columns = 0; columns < 9; columns++) {
    System.out.print(myArray[rows][columns] + " ");
  }
  System.out.println();
}

#3

I know this is probably not something you need, but just to give you an idea about the other ways to do it, I put it here. The other answer is pretty much what you need.

我知道这可能不是你需要的，但只是为了让你了解其他方法，我把它放在这里。另一个答案就是你需要的。

If you are using command line to execute your java code, you can redirect STDOUT to a file by running your code like this: java Main > output.txt

如果使用命令行执行java代码，可以通过运行以下代码将STDOUT重定向到文件：java Main> output.txt

You can also redirect STDIN: java Main < input.txt > output.txt.

您还可以重定向STDIN：java Main output.txt。

#1