import java.io.BufferedReader;
import java.io.InputStreamReader;
/*
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class Test{
public static void main(String[] args){
String ziFuChuan=null;
try{
BufferedReader zhuanHuanLiu=new BufferedReader(new InputStreamReader(System.in));
ziFuChuan=zhuanHuanLiu.readLine();
System.out.println("字元串是:"+ziFuChuan);
}
catch(Exception e){}
}
}
//System.in是位元組流,想要轉換成字元流就得用上面的方法。
//轉換流是将JAVA不允許的情況變成可能,比如輸入字元串中帶漢字。
*/
public class Test{
public static void main(String[] args)throws Exception{
String ziFuChuan="111111";
System.out.println("字元串是"+ziFuChuan);
BufferedReader a=new BufferedReader(new InputStreamReader(System.in));
ziFuChuan=a.readLine();//如果直接輸入回車的話,字元串就是一個空字元串。
System.out.println("______");
System.out.println(ziFuChuan+"abc");
System.out.println(ziFuChuan.equals(""));
System.out.println(ziFuChuan.equals(null));
}
}