你如何从一个文本文件中挑一条线，并将其转换成一个数组对象？ [英] How can you pick one line from a text file and transform it into an array object?

问题描述

好吧，这是code和我需要以某种方式采取从文本文件一条线，转变为一个数组对象。像P [0] =asdasdasd

 公共类Patient2 {
    公共静态无效的主要（字符串ARGS []）
    {        INT场= 0;
        字符串重复=N的;
        字符串repeat1 =Y;
        扫描仪科印=新的扫描仪（System.in）;        //文件I / O
        尝试{
              //打开是第一文件
              //命令行参数
              fstream的的FileInputStream =新的FileInputStream（Patient.txt）;
              BR的BufferedReader =新的BufferedReader（新的InputStreamReader（fstream的））;
              串strLine中;
              //读取文件一行一行
              而（（strLine中= br.readLine（））！= NULL）{
              //打印控制台上的内容
              的System.out.println（strLine中）;
              }
              //关闭输入流
              附寄（）;
                }赶上（例外五）{//捕获异常，如果任何
              通信System.err.println（错误：+ e.getMessage（））;
              }
        ArrayList的＆LT; Patient1＆GT;患者=新的ArrayList＆LT; Patient1＆GT;（）;
        Patient1 P =新Patient1（）;
        //设定值到患者对象
        patients.add（P）;
        的System.out.println（P）;
    }
}
 

解决方案

只需使用的ArrayList＆LT;弦乐＆GT; 与添加（strLine中）; 结果，并使用的toArray（新的String []）来获取数组后输入流已经被关闭。

 的ArrayList＆LT;串GT;名单=新的ArrayList＆LT;串GT;（）;
 ... 而（（strLine中= br.readLine（））！= NULL）{
    list.add（strLine中）;
 }
 ... 的String [] S = list.toArray（新的String []）;
 

Okay this is code and I need to somehow take a line from the textfile and transform into an array object. like p[0] = "asdasdasd"

public class Patient2 {
    public static void main(String args[])
    {

        int field = 0;
        String repeat = "n";
        String repeat1 = "y";
        Scanner keyIn = new Scanner(System.in);



        // FILE I/O
        try{
              // Open the file that is the first 
              // command line parameter
              FileInputStream fstream = new FileInputStream("Patient.txt");
              BufferedReader br = new BufferedReader(new InputStreamReader(fstream));
              String strLine;
              //Read File Line By Line
              while ((strLine = br.readLine()) != null)   {
              // Print the content on the console
              System.out.println (strLine);
              }
              //Close the input stream
              in.close();
                }catch (Exception e){//Catch exception if any
              System.err.println("Error: " + e.getMessage());
              }
        ArrayList<Patient1> patients=new ArrayList<Patient1>();
        Patient1 p =new Patient1();
        //set value to the patient object
        patients.add(p);
        System.out.println(p);
    }
}

解决方案

Just use an ArrayList<String> with add(strline);
and use toArray(new String []) to get the array after input stream has been closed.

 ArrayList<String> list = new ArrayList<String>();
 ...

 while ((strLine = br.readLine()) != null) {
    list.add(strLine);
 }
 ... 

 String [] s = list.toArray(new String []);

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