JAVA的三种标准输入方法例子

import java.io.*;
import java.util.*;
public class TestInput {

    public TestInput() {
    }
    
 
    public static void main(String[] args) throws IOException {
    byte b[]= new byte[50];                    //用于存放输入的字节数组
    System.out.println("please input :");
    int n=System.in.read(b);                //接受并存入数组的字节数
    String s = new String(b,0,n);            //将字节数组转换为字符串
    System.out.println("You Input:"+s);
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

String s1=br.readLine();            //读取一行
System.out.println("You input:"+s1);

Scanner read =new Scanner(System.in);
 while(read.hasNext()){
  String s2 = read.next();
  System.out.println("You input:"+s2);            //扫描器
 }    
    
    }
}