文章中某单词出现的个数代码,Java代码库,德仔网

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【Java】文章中某单词出现的个数
作者:watermusicyes / 发布于2014/1/6/ 393
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.StringTokenizer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Select {

 public static void main(String[] args) {
  int num = 0;
  //定义：字节读取流
  FileInputStream fis;
  try {
   //此处的路径需要根据具体情况来进行修改
   fis = new FileInputStream("H:\\TankWar1.9\\src\\Tank.java");
   DataInputStream dis = new DataInputStream(fis);
   String line = null;

   while ((line = dis.readLine()) != null) {
    //创建字符解析器
     StringTokenizer st=new StringTokenizer(line,"!&(){}+-= ':;<> /");
     while(st.hasMoreTokens()) {
      String string=st.nextToken();
      if(string.equals("if")) { num++; } }
    ;
    
   }
  } catch (FileNotFoundException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  }

  System.out.println(num);
 }
}









import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.StringTokenizer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Select {

 public static void main(String[] args) {
  int num = 0;
  //定义：字节读取流
  FileInputStream fis;
  try {
   
   fis = new FileInputStream("H:\\TankWar1.9\\src\\Tank.java");
   DataInputStream dis = new DataInputStream(fis);
   String line = null;

   while ((line = dis.readLine()) != null) {
    //创建字符解析类
     StringTokenizer st=new StringTokenizer(line,"!&(){}+-= ':;<> /");
     while(st.hasMoreTokens()) {
      String string=st.nextToken();
      if(string.equals("if")) { num++; } }
    ;
    
   }
  } catch (FileNotFoundException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  }

  System.out.println(num);
 }
}



import java.util.*;

public class StringTokenizerDemo
{
  public static void main(String[] args)
  {
      String str1 = "Hello world!This is Java code,stringTokenizer Demo.";
      //声明并初始化字符串str1
      String str2 = "How to use StringTokenizer?StringTokenizer?";
      //声明并初始化字符串str2
      StringTokenizer strT1 = new StringTokenizer(str1," ,.!");
     //创建StringTokenizer类的对象strT1,并构造字符串str1的分析器
      //以空格符、","、"."及"!"作为定界符
      StringTokenizer strT2 = new StringTokenizer(str2," ?");
     //创建StringTokenizer类的对象strT2,并构造字符串str2的分析器
      //以空格符及"?"作为定界符
      int num1 = strT1.countTokens();
      //获取字符串str1中语言符号的个数
      int num2 = strT2.countTokens();
      //获取字符串str2中语言符号的个数
      System.out.println("str1 has "+num1+" words.They are:");
      while(strT1.hasMoreTokens())
      {  //利用循环来获取字符串str1中下一个语言符号,并输出

         String str = strT1.nextToken();

         System.out.print("\""+str+"\" ");
      }
      System.out.println("\nstr2 has "+num2+" words.They are:");

      while(strT2.hasMoreTokens())

      {  //利用循环来获取字符串str2中下一个语言符号,并输出

          String str = strT2.nextToken();

         System.out.print("\""+str+"\" ");

      }

  }

}
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