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Java鍵盤輸入實例
引導語：java不像C中擁有scanf這樣功能強大的函數,大多是通過定義輸入輸出流對象，以下是百分網小編分享給大家的Java鍵盤輸入實例，歡迎閱讀!
import java.util.Scanner;
/**
* 測試從鍵盤讀取用戶的輸入,關鍵類為Scanner
* @author Administrator
*
*/
public class TestInput {
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
System.out.println("請輸入你的姓名：");
String name = s.nextLine();
System.out.println("請輸入你的年齡：");
int age = s.nextInt();
System.out.println("請輸入你的工資：");
float salary = s.nextFloat();
System.out.println("你的信息如下：");
System.out.println("姓名："+name+"\n"+"年齡："+age+"\n"+"工資："+salary);
}
}
說明：Scanner的對象的方法nextLine()接收字符和字符串類型的輸入;nextInt()接收int類型的;nextFloat()接收float類型的，相信后面的就不用一一列舉了吧。
方法2：
BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));
System.out.print("Please input a number:");
String str=reader.readLine(); //獲取字符串
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);
需要拋出io異常。
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[])
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String nn1="";//定義一個String整型對象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("鍵入一個整數"); r& m/ H2 s' Q h" T( |+ j
nn1=distream.readLine();//進行輸入，并把輸入的數存入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+"是一個偶數");
3 ?! ^" c% C9 ], i- G9 L9 }/ b else( u- G, Z( Z* { V# _; _0 O
System.out.println(n1+"是一個奇數"); 2 _; b) N, Q2 \4 W9 D: y$ t! E5 ~# J
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}
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" f9 G8 K, H+ A6 P% ajava不可能出現語句在任何方法，類之外的
/* * 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();
}
/**
* 從控制對接收一行字符串，然后輸出到控制臺
* @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);
}
/**
* 從控制臺接收一個字符
* 然后打印到控制臺上
* @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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