java中的BufferReader

键盘输入的代码 package BufferedReader; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class BufferedReaderDemo { public static void main(String[] args) throws IOException { // BufferedReader的构造方法是BufferedReader(Reader in) //InputStreamReader的构造方法是InputStreamReader(InputStream in) //而System.in是InputStream对象 BufferedReader buf=new BufferedReader(new InputStreamReader(System.in)); System.out.print("请输入数据："); String msg=buf.readLine();//readLine()方法返回的是String System.out.println(msg); buf.close(); } }

//BufferedReader的构造方法是BufferedReader(Reader in) //InputStreamReader的构造方法是InputStreamReader(InputStream in) //而System.in是InputStream对象