由键盘输入数据,字符串-BufferedReader的用法

范例一:有键盘输入一串字符串,

import java.io.*;

public class bufferedreader

{

 public static void main(String args[]) throws IOException

 {

  String mystring;

  BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));

  System.out.println("input a string");

  mystring=buf.readLine();

  System.out.println("string="+mystring);

 }

}

范例2:有键盘输入数据:

import java.io.*;

 

public class bufferedreader

{

 public static void main(String args[]) throws IOException

 {

  String mystring;

  int myint;

  BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));

  System.out.println("input an integer");

  mystring=buf.readLine();

  myint=Integer.parseInt(mystring);

  System.out.println("the integer is="+myint);

 }

}

范例3:由键盘输入两个整数,并且求和:

import java.io.*;

 

public class bufferedreader

{

 public static void main(String args[]) throws IOException

 {

  String mystring1,mystring2;

  int myint1,myint2;

  BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));//定义一个BufferedReader就可以了。

  System.out.println("please input the first number");

  mystring1=buf.readLine();

  myint1=Integer.parseInt(mystring1);

  System.out.println("please input the second number");

  mystring2=buf.readLine();

  myint2=Integer.parseInt(mystring2);

  
  System.out.println(myint1+"+"+myint2+"="+(myint1+myint2));

 }

}