原文: java统计文本中某个字符串出现的次数 源代码下载地址:http://www.zuidaima.com/share/1550463297014784.htm
统计文本中某个字符串出现的次数或字符串中指定元素出现的次数
文件样本:
程序查找的上此文件带"a"的字符在多少次
结果:
package com.zuidaima.util.string; import java.io.*; /** * @author www.zuidaima.com **/ public class CountString { public static int count(String filename, String target) throws FileNotFoundException, IOException { 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(); } } }
标签: java 字符串 统计 个数 文本话题: 脚本和工具 语言基础
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原文地址:http://blog.csdn.net/yaerfeng/article/details/38380011