Question

我不明白为什么这段代码不能读取.txt文件然后将其转换为数组。我没有开始的确切行数（设置数组）所以我用while循环计算.txt文件行。该程序应计算它导入的行数，然后创建一个要复制的新数组。将信息打印到控制台。

public class Cre{

    public void openFile() throws IOException{

BufferedReader in = new BufferedReader(new FileReader("C:\\Users\\file.txt"));
String line = in.readLine();
int i=0;

String linecounterguy = "null";
int count = 0;
while(line!= null) { ///to count number of rows///

    linecounterguy = in.readLine();
    count += 1;
}

String[] array = new String[count+1];
String line1 = "try";
while(line!= null)
{
  line1 = in.readLine();
  System.out.println(line1); 



}
in.close();
for (int j = 0; j < array.length-1 ; j++) {
    linecounterguy = in.readLine();
        System.out.println(array[j]);

    }
    }
}

主类

> public class JavaApplication8 {
> 
>     /**
>      * @param args the command line arguments
>      */
>     public static void main(String[] args) throws IOException {
>         
>         
>         Cre k = new Cre();
>         k.openFile();
>     
>     
>     } }

Answer 1

这是一个小方法，可以帮助您开始将文本文件读入字符串数组。希望这有帮助！

public String[] readLines(String filename) throws IOException {
    FileReader fileReader = new FileReader(filename);
    BufferedReader bufferedReader = new BufferedReader(fileReader);
    List<String> lines = new ArrayList<String>();
    String line = null;
    while ((line = bufferedReader.readLine()) != null) {
        lines.add(line);
    }
    bufferedReader.close();
    return lines.toArray(new String[lines.size()]);
}

读取txt文件并转换为数组

1 个答案: