从txt文件中读取字符串并将其存储在数组中 [英] reading a string from an txt file and storing it in an array

问题描述

我试图从char 7开始读取txt文件中的字符串并将其存储在数组中但是这里有一些问题是代码

im trying to read the strings from a txt file starting at char 7 and storing it in an array but am having some issues here is the code

public String[] readNames(String filename)
	{
String[] names = new String[5];
String currentLine = "";
int index = 0;
try
{
    //make a new scanner object that will read from the file
    Scanner in = new Scanner(new File(filename));
    
    //loop as long as the scanner still has contents (use the hasNext method)
    while(in.hasNext())
    {
        //if the current line has "Name" in it, add the name (starts at the 
        //7th character) to the array and increase the index
        if(in.hasNext("name"))
        {
            names[index] =in.next().charAt(6) ;
            index++;
        }
        //read the next line from the file
        currentLine = in.nextLine();
    }

推荐答案

public String[] readNames(String filename)
{
    String[] names = new String[5];
    String currentLine = "", line = "";
    int index = 0;
	try
	{
            //make a new scanner object that will read from the file
            Scanner in = new Scanner(new File(filename));
    
            //loop as long as the scanner still has contents (use the hasNext method)
            while(in.hasNext())
            {
		//Read the line from file and store it in line variable
		line = in.nextLine();
		
		//Check whether line contains name in start
		if ( line.startsWith("name"))
                {
		
		//Extract string after word "name : " and store it in names array
			names[index] = line.substring(7);
			index++;
		}
            }
	}
	catch(IOException ex)
        {
		ex.printStackTrace();
        }
	
    return names;
}

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