在Java中创建一个填充随机整数的文本文件 [英] Creating a text file filled with random integers in Java

问题描述

愚蠢的问题，也许。但是我试图用512个整数填充一个空的文本文件，每个新的一行。我能够随机化并将它们写入文件，但是他们创造了大量我所希望的数字。任何人都可以帮我纠正我的代码？

  import java.io.BufferedWriter; 
 import java.io.File; 
 import java.io.FileWriter; 
 import java.io.IOException; 
 import java.util。*; 
 
 public class Randomizer {
 
 public static void main（）{
 //目标文件
 File out = new File（random.txt ）; 
 FileWriter fw = null; 
 int n = 512; 
 //尝试阻止：大多数流操作可能会抛出IO异常
尝试{
 //创建文件编写器对象
 fw = new FileWriter（out）; 
 //使用缓冲流封装作者
 BufferedWriter writer = new BufferedWriter（fw）; 
 int line; 
 Random random = new Random（）; 
 while（n> 0）{
 //随机化整数并将其写入输出文件
 line = random.nextInt（1000）; 
 writer.write（line +\\\
）; 
 n--; 
} 
 //关闭流
 writer.close（）; 
} catch（IOException e）{
 e.printStackTrace（）; 
 System.exit（0）; 
 
 
 
 
 
 
内容random.txt at运行结束：
 9463765593113665333437829621346187993554694651813319223268147794541131427390等。 
 
解决方案
看来你使用的是Windows  - 行结尾是不同的在Unix / Windows / Classic Mac上。
 
 
 
对于基于Windows的系统，请尝试\ r \\\
，或尝试在写字板而不是记事本中打开.txt文件 - \ n通常在Unix系统上使用，而Windows附带的Notepad应用程序已知不能很好地处理它们。
 
Stupid question, maybe. But I try to fill an empty text file with 512 integers, each on every new line. I was able to randomize and write them into the file, but they create a huge pile of numbers of what I have wished. Can anyone help me correct my code?
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.*;

public class Randomizer {

      public static void main() {
        // The target file
        File out = new File("random.txt");
        FileWriter fw = null;
        int n = 512;
        // Try block: Most stream operations may throw IO exception
        try {
            // Create file writer object
            fw = new FileWriter(out);
            // Wrap the writer with buffered streams
            BufferedWriter writer = new BufferedWriter(fw);
            int line;
            Random random = new Random();
            while (n > 0) {
                // Randomize an integer and write it to the output file
                line = random.nextInt(1000);
                writer.write(line + "\n");
                n--;
            }
            // Close the stream
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
            System.exit(0);
        }
    }
}
Content of random.txt at the end of the run:
9463765593113665333437829621346187993554694651813319223268147794541131427390 etc.
解决方案
It seems that you are using Windows - line endings are different on Unix/Windows/Classic Mac.

Try \r\n for Windows-based systems, or try to open the .txt file in Wordpad instead of Notepad - \n is commonly used on Unix systems and the Notepad application included with Windows is known not to handle them well.

                        
这篇关于在Java中创建一个填充随机整数的文本文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！