Java键盘输入实例

引导语：java不像C中拥有scanf这样功能强大的函数,大多是通过定义输入输出流对象，以下是本站小编分享给大家的Java键盘输入实例，欢迎阅读!

import ner;

/**

* 测试从键盘读取用户的.输入,关键类为Scanner

* @author Administrator

*

*/

public class TestInput {

public static void main(String[] args) {

Scanner s = new Scanner();

tln("请输入你的姓名：");

String name = Line();

tln("请输入你的年龄：");

int age = Int();

tln("请输入你的工资：");

float salary = Float();

tln("你的信息如下：");

tln("姓名："+name+"n"+"年龄："+age+"n"+"工资："+salary);

}

}

说明：Scanner的对象的方法nextLine()接收字符和字符串类型的输入;nextInt()接收int类型的;nextFloat()接收float类型的，相信后面的就不用一一列举了吧。

方法2：

BufferedReader reader=new BufferedReader(new InputStreamReader());

t("Please input a number:");

String str=Line(); //获取字符串

tln("The number you input is:"+str);

或

InputStreamReader reader = new InputStreamReader();

BufferedReader input = new BufferedReader(reader);

t("Enter your age: ");

String text = Line();

int age = new Integer(text)alue();

tln("You are " + age + " years old, now,");

int year = 2003 - age;

tln("so you were probably born in " + year);

需要抛出io异常。

import .*;

- @5 n0 _4 H: c( y: Hclass JavaIO_02N {' U- 9 P1 S, C2 m- R3 p& t

public static void main(String param[])

# u P+ ]+ a2 L6 O! V {: B7 A6 r3 ^ [4 ~

String nn1="";//定义一个String整型对象nn1: b5 T) n6 E9 f4 @9 p

BufferedReader distream = new BufferedReader(new InputStreamReader());

, p1 J D/ B, @1 L" q6 P' a tln("键入一个整数"); r& m/ H2 s' Q h" T( |+ j

nn1=Line();//进行输入，并把输入的数存入nn1中/ l, u4 y3 e5 R

) J+ D7 n$ u; z% v3 Z7 g# S* w0 l int n1=eInt(nn1);( z4 l# |( L/ q

if(n1%2==0)

. C6 b9 U$ D* F( y! K tln(n1+"是一个偶数");

3 ?! ^" c% C9 ], i- G9 L9 }/ b else( u- G, Z( Z* { V# _; _0 O

tln(n1+"是一个奇数"); 2 _; b) N, Q2 4 W9 D: y$ t! E5 ~# J

}% c! z' y( d6 d/ v# {. _7 Q

}

1 F: w6 M1 H) |8 j) O: e' C4 e

& v" }5 S9 }& Y& l8 B

" f9 G8 K, H+ A6 P% ajava不可能出现语句在任何方法，类之外的

/* * Created on 2005-4-5

* * TODO To change the template for this generated file go to

* Window - Preferences - Java - Code Style - Code Templates

*/

import eredReader;

import ception;

import tStreamReader;

/**

* @author Zhangql

*

* TODO To change the template for this generated type comment go to

* Window - Preferences - Java - Code Style - Code Templates

*/

public class EnterConsole

{

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

{

EnterConsole enterConsole = new EnterConsole();

tConsoleChar();

}

/**

* 从控制对接收一行字符串，然后输出到控制台

* @throws IOException

*/

public void printConsoleLine() throws IOException

{

BufferedReader br = new BufferedReader(new InputStreamReader());

String str = null;

tln("Enter your value:");

str = Line();

tln("your value is :"+str);

}

/**

* 从控制台接收一个字符

* 然后打印到控制台上

* @throws IOException

*/

public void printConsoleChar() throws IOException

{

t("Enter a Char:");

char i = (char) ();

tln("your char is :"+i);

}

}