wordfreq.java

介绍了java的一些应用

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package 统计字符数;
import java.io.*;
/**
 *
 * @author liuwei
 */
public class wordFreq {
    char wor[];
    int wei[];
 public static void main(String[] args){
      wordFreq wf=new wordFreq();
   int N=256;int k,j;
   wf.wor=new char[N];
   wf.wei=new int[N];
   int lengMax=1000;//要统计字符数最大为1000
        for( k=0;k<N;k++)wf.wei[k]=0;//先将所有可能的权值赋0
   //for( k=0;k<N;k++)wf[k].wor='a';
   int count=0;
   String sourses;
   sourses=" ";
   System.out.println("输入字符串，统计各个字符出现频率：");
   try{
       BufferedReader br= new BufferedReader (new InputStreamReader(System.in));
       sourses=br.readLine();
   }catch(IOException e){}  
   int mark;
   for(k=0;k<sourses.length();k++){
      char temp= sourses.charAt(k);
	mark=0;
	for(j=1;wf.wei[j]!=0;j++)
	{
	   if (temp==wf.wor[j])
	  {wf.wei[j]++;mark=1;break;}
	}
	if (mark==0)
	{   count++;
	  wf.wor[count]=temp;
	  wf.wei[count]++;
	} 
     }  
  for(k=1;k<=count;k++){
       System.out.println(wf.wor[k]+"出现次数："+wf.wei[k]);
  }
}
}