如何从用户获取输入并将其保存到文本文件中 [英] how to get input from the user and save that into a text file

问题描述

我想从用户那里得到输入。

输入20行。

想要将其保存在一个文本文件中。

每行应该在一个新行中出现。

就是这样。

谢谢。

I want to get input from user.
input of 20 lines.
want to save it in a text file.
every line should occur in a new line.
thats it.
thanks.

推荐答案

你应该从这个文档 [ ^ ]。



仍然，



使用扫描仪获取输入并执行以下操作，

You should take a help from this documentation[^].

Still,

get the input using Scanner and do the following,

try {
 
			String content = "This is the content to write into file";
// get you content here using Scanner
 
			File file = new File("C:/file1.txt");
 
			// if file doesnt exists, then create it
			if (!file.exists()) {
				file.createNewFile();
			}
 
			FileWriter fw = new FileWriter(file.getAbsoluteFile());
			BufferedWriter bw = new BufferedWriter(fw);
			bw.write(content);
			bw.close();
 
			System.out.println("Done");
 
		} catch (IOException e) {
			e.printStackTrace();
		}

-KR

-KR

在C中你有stdio.h，它包含所有标准的io功能：

在您的场景中，您需要：

printf（）将输出写入屏幕。

scanf（）从键盘读取输入。

对于文件操作，您需要更多步骤：

In C you have stdio.h which contains all standard io functionality:
In your scenario you would require:
printf() to write output to the screen.
scanf() to read input from keyboard.
For file operations you require a couple more steps:

FILE *myfile;
myfile = fopen("myfile.txt", "w"); // or r, a, r+, w+, a+
fprintf(myfile, "Whatever...\n");
fclose(myfile); // always

Resp Person，

程序接受20行，以更改换行循环次数。

按下回车键后，该行会写入文件。



-----------------试试这段代码-----------------------

Resp Person,
Program Accept 20 lines, to change line change loop count.
After press enter button, that line gets write to file.

-----------------Try This code-----------------------

import java.io.BufferedReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;

public class Demo 
{
	public static void main(String[] args) 
	{
		try 
		{
		      //create a buffered reader that connects to the console
		      BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		      //create an print writer for writing to a file
		      PrintWriter out = new PrintWriter(new FileWriter("output.txt"));
		      		      
		      for(int i =0; i < 20; i++)		      		     
			      //output to the file a line
		    	  out.println(in.readLine());
		      
		      //close the file (VERY IMPORTANT!)
		      out.close();
		   }
		   catch(IOException e1) 
		   {
		        System.out.println("Error during reading/writing");
		   }
	}
}

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