JAVA读取文件单词出现次数_用javaIO流读取文本中英文字母和英文单词的出现次数及频率...

一、读取文本中英文字母出现的次数并降序输出英文字母的百分比

源码；

package total;

import java.io.BufferedReader;

import java.io.FileReader;

import java.io.IOException;

import java.util.Arrays;

public class Statistics_letter {

public static void main(String[] args) throws IOException {

// TODO Auto-generated method stub

FileReader fr=new FileReader("a.txt");

BufferedReader bufr=new BufferedReader(fr);

StringBuffer str=new StringBuffer();

String Line=null;

while((Line=bufr.readLine())!=null) {

str.append(Line);

}

bufr.close();

double capitalletter[]=new double[26];

double lowercaseletter[]=new double[26];

int count=0;

for(int i=0;i

char ch=str.charAt(i);

if(ch>='A'&&ch<='Z'||ch>='a'&&ch<='z') {

for(int j=0;j<26;j++) {

if(ch=='A'+j)

capitalletter[j]++;

}

for(int k=0;k<26;k++) {

if(ch=='a'+k)

lowercaseletter[k]++;

}

count++;

}

}

double percentage1[]=new double[52];

double percentage2[]=new double[52];

for(int i=0;i<26;i++) {

percentage1[i]=capitalletter[i]/count;

percentage2[i]=percentage1[i];

}

for(int i=26;i<52;i++) {

percentage1[i]=lowercaseletter[i-26]/count;

percentage2[i]=percentage1[i];

}

Arrays.sort(percentage1);

for(int i=51;i>=0;i--) {

int max=0;

for(int j=0;j<52;j++) {

if(percentage2[j]==percentage1[i])

max=j;

}

if(max>=26)

System.out.print(((char)('a'+max-26))+"：");

else

System.out.print(((char)('A'+max))+"：");

System.out.println(String.format("%.2f",percentage1[i]*100)+'%');

}

System.out.println("英文字母总数为："+count);

}

}

运行结果截图:

二、读取文本中的英文单词并按出现次数降序输出结果

源码：

package total;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.util.HashMap;

import java.util.Map;

public class Statistics_words {

public Map map1 = new HashMap();

public static void main(String arg[]) throws IOException {

String sz[];

Integer num[];

final int MAXNUM = 20;

sz = new String[MAXNUM + 1];

num = new Integer[MAXNUM + 1];

Statistics_words Statistics_words = new Statistics_words();

int account = 1;

// Vector ve1=new Vector();

Statistics_words.textImport();

System.out.println("文本出现单词的次数情况为:");

int g_run = 0;

for (g_run = 0; g_run < MAXNUM + 1; g_run++) {

account = 1;

for (Map.Entry it : Statistics_words.map1.entrySet()) {

if (account == 1) {

sz[g_run] = it.getKey();

num[g_run] = it.getValue();

account = 2;

}

if (account == 0) {

account = 1;

continue;

}

if (num[g_run] < it.getValue()) {

sz[g_run] = it.getKey();

num[g_run] = it.getValue();

}

// System.out.println("英文单词: "+it.getKey()+" 该英文单词出现次数: "+it.getValue());

}

Statistics_words.map1.remove(sz[g_run]);

}

int g_count = 1;

String tx1 = new String();

for (int i = 0; i < g_run; i++) {

if (sz[i] == null)

continue;

if (sz[i].equals(""))

continue;

tx1 += "出现次数第" + (g_count) + "多的单词为:" + sz[i] + "\t\t\t出现次数: " + num[i] + "\r\n";

System.out.println("出现次数第" + (g_count) + "多的单词为:" + sz[i] + "\t\t\t出现次数: " + num[i]);

g_count++;

}

Statistics_words.textExport(tx1);

}

public void textImport() throws IOException {

File a = new File("C:\\Users\\22400\\Desktop\\a.txt");

FileInputStream b = new FileInputStream(a);

InputStreamReader c = new InputStreamReader(b, "UTF-8");

String string2 = new String();

while (c.ready()) {

char string1 = (char) c.read();

if (!isWord(string1)) {

if (map1.containsKey(string2)) {

Integer num1 = map1.get(string2) + 1;

map1.put(string2, num1);

} else {

Integer num1 = 1;

map1.put(string2, num1);

}

string2 = "";

} else {

string2 += string1;

}

}

if (!string2.isEmpty()) {

if (map1.containsKey(string2)) {

Integer num1 = map1.get(string2) + 1;

map1.put(string2, num1);

} else {

Integer num1 = 1;

map1.put(string2, num1);

}

string2 = "";

}

c.close();

b.close();

}

public void textExport(String txt) throws IOException {

File fi = new File("StatisticsWord.txt");

FileOutputStream fop = new FileOutputStream(fi);

OutputStreamWriter ops = new OutputStreamWriter(fop, "UTF-8");

ops.append(txt);

ops.close();

fop.close();

}

public boolean isWord(char a) {

if (a <= 'z' && a >= 'a' || a <= 'Z' && a >= 'A')

return true;

return false;

}

}

标签：java,String,英文字母,javaIO,英文单词,run,import,new,string2

来源： https://www.cnblogs.com/weixiao1717/p/12151740.html