如何在Java中String数组的文本文件，存储读取？ [英] How to read from text file and store in String array in Java?

问题描述

我有一个包含数据如下文本文件TextFile.txt的：

  A-ABC，A-XYZ，B-MNO，A-IJK，B-PQR
 

现在，我已经从这个文件读取和值存储在两个单独的数组A和B，使得具有preFIX值A - 获取存储在数组A和preFIX值B-获取存储在阵列B.

此外，当存储数据时，preFIX需要即只ABC需要被存储在数组A被删除。

 的FileInputStream fstream的=新的FileInputStream（C：\\选择\\ New_Workspace \\ Salary.txt）;
//使用DataInputStream以读取二进制而不是文本
// DataInputStream以在=新DataInputStream所（fstream的）;
BR的BufferedReader =新的BufferedReader（新的InputStreamReader（fstream的））;
串strLine中;
而（（strLine中= br.readLine（））！= NULL）{
串[] arrayLine1 = strLine.split（，）;
对于（一个String：arrayLine1）的String [] = arrayLine2 s.split（：）;
{
如果（s.matches（基本））
{
基本= Double.parseDouble（arrayLine [1]）;
}
否则如果（s.matches（四氯乙烯-D）;
{
percD = Double.parseDouble（arrayLine [3]）;
}
否则，如果（s.matches（四氯乙烯-A））
{
河鲈= Double.parseDouble（arrayLine [5]）;
}}
 

解决方案

尝试是这样的： -

 的FileInputStream中=新的FileInputStream（file.txt的）;
    BR的BufferedReader =新的BufferedReader（新的InputStreamReader（中））;    串strLine中;
    的String [] filearray;
    filearray =新的String [10];    而（（strLine中= br.readLine（））！= NULL）{    对于（INT J = 0; J＆LT; myarray.length; J ++）{
    filearray [J] = br.readLine（）;
    }    }
    附寄（）;
 

I have a text file textfile.txt which contains data as follows :

A-abc , A-xyz , B-mno , A-ijk , B-pqr

Now, i have to read from this file and store the values in two separate arrays "A" and "B" , such that the values with prefix "A-" gets stored in array A and values with prefix "B-" gets stored in array B.

Also, while storing the data, the prefix needs to be removed i.e. only "abc" needs to be stored in array A.

FileInputStream fstream = new FileInputStream("C:\opt\New_Workspace\Salary.txt"); 
// use DataInputStream to read binary NOT text
// DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(fstream));
String strLine;
while ((strLine = br.readLine()) != null)   {
String[] arrayLine1= strLine.split(" , ");
for(String s:arrayLine1)

String[] arrayLine2 = s.split(": ");
{
if(s.matches("Basic: "))
{
basic = Double.parseDouble(arrayLine[1]);                 
}
else if(s.matches("Perc-D ");
{
percD = Double.parseDouble(arrayLine[3]);                
}
else if(s.matches("Perc-A: "))
{
percA = Double.parseDouble(arrayLine[5]);                 
}

}

解决方案

Try something like this :-

FileInputStream in = new FileInputStream("file.txt");
    BufferedReader br = new BufferedReader(new InputStreamReader(in));

    String strLine;
    String[] filearray;
    filearray = new String[10];

    while ((strLine = br.readLine()) != null) {

    for (int j = 0; j < myarray.length; j++){
    filearray[j] = br.readLine();
    }

    }
    in.close();

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