import java.util.Scanner;
/**
* 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(System.in);
System.out.println("请输入你的姓名：");
String name = s.nextLine();
System.out.println("请输入你的年龄：");
int age = s.nextInt();
System.out.println("请输入你的工资：");
float salary = s.nextFloat();
System.out.println("你的信息如下：");
System.out.println("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(System.in));
System.out.print("Please input a number:");
String str=reader.readLine(); //获取字符串
System.out.println("The number you input is:"+str);
或
InputStreamReader reader = new InputStreamReader(System.in);
BufferedReader input = new BufferedReader(reader);
System.out.print("Enter your age: ");
String text = input.readLine();
int age = new Integer(text).intValue();
System.out.println("You are " + age + " years old, now,");
int year = 2003 - age;
System.out.println("so you were probably born in " + year);
需要抛出io异常。
import java.io.*;
- @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(System.in));
, p1 J D/ B, @1 L" q6 P' a System.out.println("键入一个整数"); r& m/ H2 s' Q h" T( |+ j
nn1=distream.readLine();//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=Integer.parseInt(nn1);( z4 l# |( L/ q
if(n1%2==0)
. C6 b9 U$ D* F( y! K System.out.println(n1+"是一个偶数");
3 ! ^" c% C9 ], i- G9 L9 }/ b else( u- G, Z( Z* { V# _; _0 O
System.out.println(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 java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
/**
* @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();
enterConsole.printConsoleChar();
}
/**
* 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(System.in));
String str = null;
System.out.println("Enter your value:");
str = br.readLine();
System.out.println("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
{
System.out.print("Enter a Char:");
char i = (char) System.in.read();
System.out.println("your char is :"+i);
}
}
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