package com.cyc;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
public class Test02 {
    public static void main(String[] args) {
      while (true){
          BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
          try {
              while (true){
              String str=br.readLine();
              System.out.println(str);
              test.show();
              br.close();
              }
          } catch (IOException e) {
              e.printStackTrace();
          }
      }
    }
}
class test{
    static void show(){
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        try {
            br.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

java.io.IOException: Stream closed
	at java.io.BufferedInputStream.getBufIfOpen(BufferedInputStream.java:170)
	at java.io.BufferedInputStream.read(BufferedInputStream.java:336)
	at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)
	at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326)
	at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
	at java.io.InputStreamReader.read(InputStreamReader.java:184)
	at java.io.BufferedReader.fill(BufferedReader.java:161)
	at java.io.BufferedReader.readLine(BufferedReader.java:324)
	at java.io.BufferedReader.readLine(BufferedReader.java:389)
	at com.cyc.Test02.main(Test02.java:14)

public class Test01 {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = br.readLine();
        System.out.println(str);
        br.close();
        BufferedReader bb = new BufferedReader(new InputStreamReader(System.in));
        str = bb.readLine();
        System.out.println(str);
        bb.close();
    }
}

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
class NotCloseISR extends InputStreamReader{
    public NotCloseISR(InputStream in){
        super(in);
    }
    public void close() throws IOException {
        //do nothing
    }
}
public class Test {
    public static void main(String[] args) throws IOException {
        testInput(); // 兩次調(diào)用該函數(shù)，但每次調(diào)用后僅關(guān)閉BufferedReader的流而不關(guān)閉System.in流
        testInput();
    }
    public static void testInput() throws IOException {
        //對于傳入的System.in做包裝
        BufferedReader reader = new BufferedReader(new NotCloseISR(System.in)); // 
        System.out.println("請輸入一行字符：");
        String str = reader.readLine();
        System.out.println("輸入的字符：" + str);
        reader.close(); // 
    }
}