Question

我使用下面的代码从txt文件中读取。

ArrayList<String> elements = new ArrayList<String>();
String line = null;
BufferedReader in = new BufferedReader(new FileReader("example.txt"));
//in.close();
while((line = in.readLine()) != null){
    elements.add(line);
}
check1 = (elements.get( 0));
System.out.println("HEYAAA \n" + check1);
//GUIServer guiServer = new GUIServer();
}catch(Exception e){
    System.out.println("Error while reading file line by line:" + e.getMessage());
}

我有＆＃34; 1。我的名字是bob \ n 2.帮助你\ n 3.只是测试＆＃34;在txt文件里面全部在一行..但是当我把它读到java中时，它会在一行中打印并且不会读取＆＃34; \ n＆＃34; ..我怎么能这样做才能打印出来在3行，所以它读取＆＃34; \ n＆＃34; ..？

或者我可以在新行上分别在txt文件上手动分隔它们，但是如何读取3行并存储到一个变量中？？

哪种方式更容易，我会感激你的帮助。

Answer 1

1）＆＃34; example.txt＆＃34;包含："1. my name is bob \n 2. help you \n 3. Just testing"

2）你想把它解释为

1. my name is bob
2. help you
3. Just testing

3）缓冲的读者无法转换＆＃34; \ n＆＃34;自动 - 你必须在你的程序中这样做。

4）建议：

String.split()或String.replace()。

ADDENDUM - 这是一个完整的例子：

1）代码：

package com.so.readlines;

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.Collections;

public class ReadLines {

    public static void main(String[] args) {
        // Declare our array list
        ArrayList<String> elements = new ArrayList<String>();
        String line;
        BufferedReader in = null;
        try {
            // Open file
            in = new BufferedReader(new FileReader("example.txt"));
            // Read next line (with embedded "\n" text string)
            while((line = in.readLine()) != null){
                // ... split "line" into String[] array; add it to "elements" arraylist
                // Collections.addAll(elements, line.split("\\\\n"));
                String[] a = line.split("\\\\n");
                Collections.addAll(elements, a);
            }
            in.close();
            //String check1 = (elements.get( 0));
            //System.out.println("HEYAAA \n" + check1);
            //GUIServer guiServer = new GUIServer();
        }
        catch(Exception e){
            System.out.println("Error while reading file line by line:" + e.getMessage());
        }

        // Print contents of array list
        int i = 0;
        for (String s : elements) {
            System.out.println ("elements[" + i++ + "]=" + s);
        }
    }

}

2）Example.txt（注意＆＃34之后的额外空格; \ n＆＃34;）：

1. my name is bob \n 2. help you \n 3. Just testing

3）示例输出：

elements[0]=1. my name is bob 
elements[1]= 2. help you 
elements[2]= 3. Just testing

＆＃39;希望有所帮助...

从文件读取错误java

1 个答案: