package text; import java.io.File; import java.util.Scanner; import java.io.FileNotFoundException; import java.util.HashMap; import java.util.Iterator; import java.util.Set; public class zimupinlv { public static <type> void main (String[] args) throws FileNotFoundException { File file=new File("C:\\Users\\冯静妃\\Desktop\\StringBuffer.txt"); if(!file.exists()){ System.out.println("文件不存在"); return; } Scanner scanner=new Scanner(file); HashMap<String,Integer> hashMap=new HashMap<String,Integer>(); while(scanner.hasNextLine()) { String line=scanner.nextLine(); String[] lineWords=line.split("\\W+"); Set<String> wordSet=hashMap.keySet(); for(int i=0;i<lineWords.length;i++) { if(wordSet.contains(lineWords[i])) { Integer number=hashMap.get(lineWords[i]); number++; hashMap.put(lineWords[i], number); } else { hashMap.put(lineWords[i], 1); } } } Iterator<String> iterator=hashMap.keySet().iterator(); while(iterator.hasNext()) { String word=iterator.next(); System.out.printf("单词:%-12s 出现次数:%d\n",word,hashMap.get(word)); } } } 这个题目中有文件的导入和读取,还有单词个数计算和输出。用了函数hashMap函数,其中的变量Integer是动态的,不断向后面的单词取值,之后映射给String,从而比较来计数,如果相等就number加1,如果不等就赋值次数为1。
原文地址:https://www.cnblogs.com/fengjingfei/p/11595141.html
时间: 2024-10-08 02:37:39