new Counter()怎么调用toString()

Question

import java.util.Hashtable;
class Counter
  {
 int i=1;
 public String toString()
   {
 return Integer.toString(i);
 }
 }
  public class Test
  {
   public static void main(String[] args)
   {
  Hashtable t=new Hashtable();
  for(int i=0;i<1000;i++)
  {
  Integer r=new Integer((int)(Math.random()*200));
  if(t.containsKey(r))
    
  ((Counter)t.get(r)).i++;

  else
  t.put(r, new Counter());//这里
  }
  System.out.println(t);
  }
  }

Answer 1

t.put(r, new Counter());//这里
t.put(r, new Counter().toString());//这里

Answer 2

初学，Hashtable还不懂是什么。好像Core Java第二本才有Hashtable的介绍去了。

Answer 3

new Counter().toString();就行了哦 

Answer 4

服务端
import java.net.*;
import java.io.*;
import java.util.*;
class fanserver
{
    static List<fanclient> client = new ArrayList<fanclient>();
    public static void main(String[] args)throws Exception 
    {
        Socket s;
        ServerSocket ss = new ServerSocket(4445);
        while(true){
            s = ss.accept();
            System.out.println("haha...");
            server ser = new server(s);
            new Thread(ser).start();
            client.add(ser);
        }
    /*    BufferedReader br = 
            new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bwout = 
            new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
        BufferedReader brin = 
            new BufferedReader(new InputStreamReader(s.getInputStream()));
        String str = null;
        while((str=brin.readLine())!=null){
        //    System.out.println(str);
            bwout.write(str);
            bwout.flush();
            bwout.newLine();
        }
        */
        
    //    s.shutdownOutput();
        
        
    }
}
class server implements Runnable
{
    private Socket s;
    server(Socket s){
        this.s = s;
    }
    public void run(){
        try{
            
            BufferedWriter bwout = 
                new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
            BufferedReader brin = 
                new BufferedReader(new InputStreamReader(s.getInputStream()));
            
            String str = null;
            while((str=brin.readLine())!=null){
                System.out.println(str);
                bwout.write(str);
                bwout.newLine();
                
                bwout.flush();
            }
        //    s.shutdownOutput();
            
        }
        catch(Exception e){}
    }
}
Java code客户端import java.net.*;
import java.io.*;
class fanclient 
{        public static void main(String[] args)throws Exception
    {
        Socket s = new Socket("192.168.30.129",4445);
        BufferedReader br = 
            new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bwout = 
            new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
        BufferedReader brin = 
            new BufferedReader(new InputStreamReader(s.getInputStream()));
        new Thread(new client(brin)).start();
        String str = null;
        while((str=br.readLine())!=null){
            
            bwout.write(str);
            
            bwout.newLine();
            bwout.flush();
            
        }
        
    //    s.shutdownOutput();
    
    //    String line = brin.readLine();
    //    System.out.println(line);
    
    
    }
}
class client implements Runnable
{
    private BufferedReader brin;
    client(BufferedReader brin)
    {
        this.brin = brin;
    }
    public void run(){
        String line = null;
        try{
            while((line=brin.readLine())!=null){
                System.out.println(line);    
            }
        }catch(Exception e){}
    }
}我同时启动好几个客户端，想让客户端通过服无端互相接收到信息，怎么处理， 
 

Answer 5

Counter c=new Counter();
c.toString();等价于
new Counter().toString();

Answer 6

toString()是object的方法，每个类都可以直接调用.