java语言 找出文章中出现次数最多的单词

Posted 2021-01-12 赵墨涵66

package english;
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 Words {
	public static <type> void main (String[] args) throws FileNotFoundException {
    	File file=new File("E:\word.txt");                  //读取文件
		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>();
		//System.out.println("文章-----------------------------------");
		while(scanner.hasNextLine()) {
			String line=scanner.nextLine();
			//System.out.println(line);
			String[] lineWords=line.split("\W+");          //导入文章，但是被注释掉了
			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);
				}
			}
		}
		//System.out.println("统计单词：------------------------------");
		Iterator<String> iterator=hashMap.keySet().iterator();
		int max=0;
		String maxword=null;
		while(iterator.hasNext()){
			String word=iterator.next();
			//System.out.printf("单词:%-12s 出现次数:%d
",word,hashMap.get(word));
			if(hashMap.get(word)>max) {                          //比较出现次数最多的单词
				max=hashMap.get(word);
				maxword=word; 
			}
		}	
		System.out.println("出现最多的是"+maxword);
		System.out.println("最多出现了"+max+"次");
	}
}