标签:exception orm aio puts new exti 情况 move fileread
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<str.length();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<String, Integer> map1 = new HashMap<String, Integer>(); 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<String> ve1=new Vector<String>(); 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<String, Integer> 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; } }
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
标签:exception orm aio puts new exti 情况 move fileread
原文地址:https://www.cnblogs.com/weixiao1717/p/12151740.html