package 字母频率; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.Reader; import java.io.StreamTokenizer; import java.util.HashMap; import java.util.Scanner; public class main { static void a() { try { char shu[] = new char[1000000]; char zimu[] = new char[52]; int j=0; int count[]=new int[52]; String pathname="C:\\\\\\\\Users\\\\\\\\xxoo\\\\\\\\Desktop\\\\\\\\飘.txt"; File filename=new File(pathname); InputStreamReader reader=new InputStreamReader(new FileInputStream(filename)); BufferedReader br=new BufferedReader(reader); String line[]=new String[1000];; for(int i=0;i<line.length;i++){ line[i]=br.readLine(); // System.out.println(line[i]); } br.close(); int k=0; while(line[k]!=null) { for(int i=0;i<line[k].length();i++) { shu[j]=line[k].charAt(i); j++; } k++; } for(int i=0;i<shu.length;i++) { switch(shu[i]) { case 'a':zimu[0]='a';count[0]++;break; case 'b':zimu[1]='b';count[1]++;break; case 'c':zimu[2]='c';count[2]++;break; case 'd':zimu[3]='d';count[3]++;break; case 'e':zimu[4]='e';count[4]++;break; case 'f':zimu[5]='f';count[5]++;break; case 'g':zimu[6]='g';count[6]++;break; case 'h':zimu[7]='h';count[7]++;break; case 'i':zimu[8]='i';count[8]++;break; case 'j':zimu[9]='j';count[9]++;break; case 'k':zimu[10]='k';count[10]++;break; case 'l':zimu[11]='l';count[11]++;break; case 'm':zimu[12]='m';count[12]++;break; case 'n':zimu[13]='n';count[13]++;break; case 'o':zimu[14]='o';count[14]++;break; case 'p':zimu[15]='p';count[15]++;break; case 'q':zimu[16]='q';count[16]++;break; case 'r':zimu[17]='r';count[17]++;break; case 's':zimu[18]='s';count[18]++;break; case 't':zimu[19]='t';count[19]++;break; case 'u':zimu[20]='u';count[20]++;break; case 'v':zimu[21]='v';count[21]++;break; case 'w':zimu[22]='w';count[22]++;break; case 'x':zimu[23]='x';count[23]++;break; case 'y':zimu[24]='y';count[24]++;break; case 'z':zimu[25]='z';count[25]++;break; case 'A':zimu[26]='A';count[26]++;break; case 'B':zimu[27]='B';count[27]++;break; case 'C':zimu[28]='C';count[28]++;break; case 'D':zimu[29]='D';count[29]++;break; case 'E':zimu[30]='E';count[30]++;break; case 'F':zimu[31]='F';count[31]++;break; case 'G':zimu[32]='G';count[32]++;break; case 'H':zimu[33]='H';count[33]++;break; case 'I':zimu[34]='I';count[34]++;break; case 'J':zimu[35]='G';count[35]++;break; case 'K':zimu[36]='K';count[36]++;break; case 'L':zimu[37]='L';count[37]++;break; case 'M':zimu[38]='M';count[38]++;break; case 'N':zimu[39]='N';count[39]++;break; case 'O':zimu[40]='O';count[40]++;break; case 'P':zimu[41]='P';count[41]++;break; case 'Q':zimu[42]='Q';count[42]++;break; case 'R':zimu[43]='R';count[43]++;break; case 'S':zimu[44]='S';count[44]++;break; case 'T':zimu[45]='T';count[45]++;break; case 'U':zimu[46]='U';count[46]++;break; case 'V':zimu[47]='V';count[47]++;break; case 'W':zimu[48]='W';count[48]++;break; case 'X':zimu[49]='X';count[49]++;break; case 'Y':zimu[50]='Y';count[50]++;break; case 'Z':zimu[51]='Z';count[51]++; } } int ci=0; int sum=0; System.out.println("短文中各字母出现情况统计如下："); for(int i=0;i<52;i++) { if(count[i]!=0) { ci++; sum+=count[i]; } } ci=0; for(int i=0;i<52;i++) { if(count[i]!=0) { ci++; double a=(double) ((Math.round(count[i]*100)/100.0)/sum)*100; double b= (double) (Math.round(a*100)/100.0); System.out.println(ci+".字母"+zimu[i]+"的出现次数是:"+count[i]+" "+b+"%"); } } System.out.println("字母共计："+sum+"个"); }catch (Exception e) { e.printStackTrace(); } } static void b() throws IOException { HashMap<String, Integer>mp = new HashMap<>(); mp.put("jack", 1); mp.put("Tom", 2); mp.put("rose", 3); mp.put("jack",4); try (BufferedReader in = new BufferedReader(new FileReader("C:\\\\\\\\\\\\\\\\Users\\\\\\\\\\\\\\\\xxoo\\\\\\\\\\\\\\\\Desktop\\\\\\\\\\\\\\\\飘.txt")) ){ String line; int c = 0; while(null != (line = in.readLine())) { String[] words = line.split("\W");//单词的边界 for(String w : words) { if(w.trim().length() == 0) continue; // if(w.trim().length() == 1) { // //长度为1 // char cc = w.charAt(0); // if(!Character.isLetterOrDigit(c)) { // continue; // } // } w = w.toLowerCase();//不分大小写的统计 if(!mp.containsKey(w)) { mp.put(w, 1); }else { int n = mp.get(w); mp.put(w, n+1); } } } for(String key : mp.keySet()) { int v = mp.get(key); System.out.println(key+" "+v); } } catch (Exception e) { // TODO: handle exception } } static void b(int a) throws IOException { HashMap<String, Integer>mp = new HashMap<>(); mp.put("jack", 1); mp.put("Tom", 2); mp.put("rose", 3); mp.put("jack",4); try (BufferedReader in = new BufferedReader(new FileReader("C:\\\\\\\\\\\\\\\\Users\\\\\\\\\\\\\\\\xxoo\\\\\\\\\\\\\\\\Desktop\\\\\\\\\\\\\\\\飘.txt")) ){ String line; int c = 0; while(null != (line = in.readLine())) { String[] words = line.split("\W");//单词的边界 for(String w : words) { if(w.trim().length() == 0) continue; // if(w.trim().length() == 1) { // //长度为1 // char cc = w.charAt(0); // if(!Character.isLetterOrDigit(c)) { // continue; // } // } w = w.toLowerCase();//不分大小写的统计 if(!mp.containsKey(w)) { mp.put(w, 1); }else { int n = mp.get(w); mp.put(w, n+1); } } } for(String key : mp.keySet()) { int v = mp.get(key); System.out.println(key); System.out.println(v); } } catch (Exception e) { // TODO: handle exception } } public static void main(String[] args) throws IOException { int a=1; while(a!=0) { System.out.println("请选择：1 输出单词频率，2 输出不重复单词，3 输出前n个数量多的单词，4 去掉常用词，0 退出"); Scanner sc = new Scanner(System.in); a = sc.nextInt(); switch(a) { case 1:a();System.out.println("================================================");break; case 2:b();System.out.println("================================================");break; case 3: System.out.println("输出前几个数量多的单词"); Scanner sc1 = new Scanner(System.in); int n= sc1.nextInt(); b(n); System.out.println("================================================");break; case 4:System.out.println("================================================");break; case 0:break; } } } }