Question

我们java课作业写一小程序 我从网上找了一个 但是完全看不懂 求大神逐字帮我解释下 java基于Eclipse环境

package Tongji;
import java.util.*;
import java.util.regex.*;
import java.io.*;
public class Yinhe
{
public static void main(String args[]) throws IOException
{

BufferedReader buf=new BufferedReader(new FileReader("english.txt"));
System.out.println("Read under this dir English.txt");
StringBuffer sbuf=new StringBuffer();
String line=null;
while((line=buf.readLine())!=null)
{
sbuf.append(line);
}
buf.close();
Pattern expression=Pattern.compile("[a-za-z]+");
String string1=sbuf.toString().toLowerCase();
Matcher matcher=expression.matcher(string1);
TreeMap myTreeMap=new TreeMap();
int n=0;
Object word=null;
Object num=null;
while(matcher.find())
{
word=matcher.group();
n++;
if(myTreeMap.containsKey(word)){
num=myTreeMap.get(word);
Integer count=(Integer)num;
myTreeMap.put(word,new Integer(count.intValue()+1));
}
else
{
myTreeMap.put(word,new Integer(1));
}
}
System.out.println("统计分析如下:");
System.out.println("文章中单词总数"+n+"个");
System.out.println("具体的信息在目录的result.txt文件中");
BufferedWriter bufw=new BufferedWriter(new FileWriter("result.txt"));
Iterator iter=myTreeMap.keySet().iterator();
Object key=null;
while(iter.hasNext()){
key=iter.next();
bufw.write((String)key+":"+myTreeMap.get(key));
bufw.newLine();
}
bufw.write("english.txt中的单词总数"+n+"个");
bufw.newLine();
bufw.write("english.txt中不同单词"+myTreeMap.size()+"个");
bufw.close();
}
}

悬赏50 问题解决追加30 可以发邮箱 jiazhenwow@hotmail.com

Answer 1

package Tongji;
import java.util.*; 
import java.util.regex.*; 
import java.io.*; 
public class Yinhe 
{
	public static void main(String args[]) throws IOException 
	{ 
	//读取文件 english.txt
	BufferedReader buf=new BufferedReader(new FileReader("english.txt")); 
	
	System.out.println("Read under this dir English.txt"); 
	
		//文件信息保存在sbuf
	StringBuffer sbuf=new StringBuffer(); 
	String line=null; 
	while((line=buf.readLine())!=null) 
	{ 
	sbuf.append(line); 
	} 
	buf.close(); 

	//正则匹配是否是英文单词
	Pattern expression=Pattern.compile("[a-za-z]+"); 
	String string1=sbuf.toString().toLowerCase(); //转化为小写
	Matcher matcher=expression.matcher(string1); //开始匹配
	//创建一个TreeMap保存匹配结果
	TreeMap myTreeMap=new TreeMap(); 
	int n=0; 
	Object word=null; 
	Object num=null; 
	while(matcher.find()) //匹配到
	{ 
	word=matcher.group();
	n++; //变量加1
	if(myTreeMap.containsKey(word)){ 
	num=myTreeMap.get(word); 
	Integer count=(Integer)num; 
	myTreeMap.put(word,new Integer(count.intValue()+1));  //提取匹配到的单词
	} 
	else 
	{ 
	myTreeMap.put(word,new Integer(1)); 
	} 
	} 
	System.out.println("统计分析如下:"); 
	System.out.println("文章中单词总数"+n+"个"); 
	System.out.println("具体的信息在目录的result.txt文件中"); 
	//下面的就不用说了，将结果保存到一个文件当中result.txt
	BufferedWriter bufw=new BufferedWriter(new FileWriter("result.txt")); 
	Iterator iter=myTreeMap.keySet().iterator(); 
	Object key=null; 
	while(iter.hasNext()){ 
	key=iter.next(); 
	bufw.write((String)key+":"+myTreeMap.get(key)); 
	bufw.newLine(); 
	} 
	bufw.write("english.txt中的单词总数"+n+"个"); 
	bufw.newLine(); 
	bufw.write("english.txt中不同单词"+myTreeMap.size()+"个"); 
	bufw.close(); 
	} 
	}