package pre.lq;
//20173522 李秦
import java.util.Scanner;
public class Main
{
static Tongji word=new Tongji();
static Tongjizm zm=new Tongjizm();
static Tongjitwo two=new Tongjitwo();
public static void main(String []args) throws Exception
{
Scanner scn=new Scanner(System.in);
while(true)
{
System.out.print("1,统计第一章中字母出现的频率排序"+"
"
+"2,统计第一章中单词出现的频率的排序"+"
"
+"3,统计第一章中单词出现频率前十的排序"+"
");
int x=scn.nextInt();
switch (x)
{
case 1: zm.ZiMu();
break;
case 2: word.Word();
break;
case 3: two.Wordtwo();
default:
System.exit(0);
}
}
}
}
import java.io.*;
import java.text.DecimalFormat;
import java.util.*;
public class Tongji
{
public Tongji()
{
}
public void Word( ) throws Exception
{
BufferedReader br = new BufferedReader(new FileReader("D:"+File.separator+"第一章.txt"));
StringBuffer sb = new StringBuffer();
String text =null;
while ((text=br.readLine())!= null)
{
sb.append(text);// 将读取出的字符追加到stringbuffer中
}
br.close(); // 关闭读入流
String str = sb.toString().toLowerCase(); // 将stringBuffer转为字符并转换为小写
String[] words = str.split("[^A-Za-z]+"); // 非单词的字符来分割，得到所有单词
Map<String ,Integer> map = new HashMap<String, Integer>() ;
for(String word :words)
{
if(map.get(word)==null)
{ // 若不存在说明是第一次，则加入到map,出现次数为1
map.put(word,1);
}
else
{
map.put(word,map.get(word)+1); // 若存在，次数累加1
}
}
// 排序
List<Map.Entry<String ,Integer>> list = new ArrayList<Map.Entry<String,Integer>>(map.entrySet());
Comparator<Map.Entry<String,Integer>> comparator = new Comparator<Map.Entry<String, Integer>>()
{
public int compare(Map.Entry<String, Integer> left, Map.Entry<String, Integer> right)
{
return (left.getValue().compareTo(right.getValue()));
}
};
// 集合默认升序升序
Collections.sort(list,comparator);
for(int i=0;i<list.size();i++)
{// 由高到低输出
DecimalFormat df=new DecimalFormat("0.00");
String num=df.format((float)list.get(list.size()-i-1).getValue()/list.size()*100);
System.out.println(list.get(list.size()-i-1).getKey() +":"+num+"%");
}
}
}
package pre.lq;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
public class Tongjitwo
{
public Tongjitwo()
{
}
public void Wordtwo( ) throws Exception
{
Scanner scn=new Scanner(System.in);
BufferedReader br = new BufferedReader(new FileReader("D:"+File.separator+"第一章.txt"));
StringBuffer sb = new StringBuffer();
String text =null;
while ((text=br.readLine())!= null)
{
sb.append(text);// 将读取出的字符追加到stringbuffer中
}
br.close(); // 关闭读入流
String str = sb.toString().toLowerCase(); // 将stringBuffer转为字符并转换为小写
String[] words = str.split("[^A-Za-z]+"); // 非单词的字符来分割，得到所有单词
Map<String ,Integer> map = new HashMap<String, Integer>() ;
for(String word :words)
{
if(map.get(word)==null)
{ // 若不存在说明是第一次，则加入到map,出现次数为1
map.put(word,1);
}
else
{
map.put(word,map.get(word)+1); // 若存在，次数累加1
}
}
// 排序
List<Map.Entry<String ,Integer>> list = new ArrayList<Map.Entry<String,Integer>>(map.entrySet());
Comparator<Map.Entry<String,Integer>> comparator = new Comparator<Map.Entry<String, Integer>>()
{
public int compare(Map.Entry<String, Integer> left, Map.Entry<String, Integer> right)
{
return (left.getValue().compareTo(right.getValue()));
}
};
// 集合默认升序升序
Collections.sort(list,comparator);
System.out.println("请输入要输出的前n个"+"
");
int n=scn.nextInt();
for(int i=0;i<n;i++)
{// 由高到低输出
DecimalFormat df=new DecimalFormat("0.00");
String num=df.format((float)list.get(list.size()-i-1).getValue()/list.size()*100);
System.out.println(list.get(list.size()-i-1).getKey() +":"+num+"%");
}
}
}
package pre.lq;
import java.io.*;
import java.text.NumberFormat;
import java.util.*;
public class Tongjizm
{
public Tongjizm()
{
}
public void ZiMu( ) throws Exception
{
BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream("D:"+File.separator+"第一章.txt")));
int[] count = new int[26];
char[] c = new char[1];
int len = br.read(c);
while(len!=-1)
{
if(c[0]<='Z'&&c[0]>='A')
{
int number = c[0];
count[number-65]++;
// COUNT[number-65]++;
}
if(c[0]<='z'&&c[0]>='a')
{
int number = c[0];
count[number-97]++;
}
len = br.read(c);
}
count=Paixu(count);
Print(count);
System.out.print("
b.txt文件读取完毕！");
br.close();
}
public static int[] Paixu(int[] count)
{
int temp;
int size=count.length;
for(int i=0;i<size-1;i++)
{
for(int j=i+1;j<size;j++)
{
if(count[i]<count[j])
{
temp=count[j];
count[j]=count[i];
count[i]=temp;
}
}
}
return count;
}
public static void Print(int[] count)
{
NumberFormat numberFormat = NumberFormat.getInstance();
// 设置精确到小数点后2位
numberFormat.setMaximumFractionDigits(2);
int sum=0;
for(int i=0;i<count.length;i++)
{
sum=count[i]+sum;
}
String[] a=new String[count.length];
for(int i=0;i<count.length;i++)
{
a[i] = numberFormat.format((float) count[i] / (float) sum * 100);
}
for(int i=0;i<26;i++)
{
if(count[i]>0)
{
char lowerCase = (char)(i+97);
System.out.println(lowerCase+"("+count[i]+")"+"("+a[i]+"%)");
}
}
}
}
