java文本读取

package luoji;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

/**

• 文本读取并查找关键字
  */
  public class test1 {

  /**

  • 读入TXT文件
    */
    public static void main(String[] args){
    String pathname = “D:\a.txt”;

    try (FileReader reader = new FileReader(pathname);
    BufferedReader br = new BufferedReader(reader)
    ) {
    String line;

     int num = 1;
     while ((line = br.readLine()) != null) {
         String str = "";
         for(int i=0;i<line.length();i++){
             char ch = line.charAt(i);
             if(ch=='a') {
                 str = (i+1) +",";
             }
             if(!str.equals("") && ch=='b') {
                 str += (i+1) +"";
                 System.out.println(num +","+ str);
             }
         }
         num++;
     }
    

    } catch (IOException e) {
    e.printStackTrace();
    }
    }

}