The number of occurrences of the specified element in the Java statistics string _java

This article illustrates the number of occurrences of a string in the statistical text or the number of occurrences of the specified element in the string, which is shared for your reference, as follows

Run Effect chart:

The number of characters on this file with "a" on the program lookup

The specific code is as follows

 package com.zuidaima.util.string; 
Import java.io.*; public class Countstring {public static int count (string filename, string target) throws FileNotFoundException, I 
  oexception {FileReader fr = new FileReader (filename); 
  BufferedReader br = new BufferedReader (FR); 
  StringBuilder strb = new StringBuilder (); 
  while (true) {String line = Br.readline (); 
  if (line = = null) {break; 
  } strb.append (line); 
  String result = Strb.tostring (); 
  int count = 0; 
  int index = 0; 
  while (true) {index = Result.indexof (target, index + 1); 
  if (Index > 0) {count++; 
  } else {break; 
  } br.close (); 
 return count; 
  public static void Main (string[] args) {try {System.out.println (count ("D:\\zuidaima.txt", "a")); 
  catch (FileNotFoundException e) {e.printstacktrace (); 
  catch (IOException e) {e.printstacktrace (); } 
 } 
  
}

  above is the number of occurrences of the specified element in the Java statistics string, which I hope will help you in your study.