用java语言怎么实现从键盘输入一个数 JAVA中如何实现从键盘中输入一个整数?
JAVA\u8bed\u8a00\u7f16\u7a0b\u4e2d\u5982\u4f55\u63a5\u6536\u4e00\u4e2a\u4ece\u952e\u76d8\u4e2d\u8f93\u5165\u7684\u6570\u5b57\u6216\u5176\u4ed6\u5b57\u7b26\uff1f1\u3001\u8fd9\u79cd\u65b9\u5f0f\u662f\u63a7\u5236\u53f0\u8f93\u5165
Scanner sc = new Scanner(System.in);
String y = sc.nextLine();
2\u3001\u7f51\u9875\u65b9\u5f0f
\u7f51\u9875\u753b\u4e2a\u6587\u672c\u6846 \u6587\u672c\u6846\u540d\u5b57\u4e3a name
\u540e\u53f0\u7a0b\u5e8f
String name = request.getParameter("name");
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class Test{
public static void main(String[] args){
int num ;
String str ;
BufferedReader brd=new BufferedReader(new InputStreamReader(System.in)) ;
while(true)
{
System.out.print("\u8bf7\u8f93\u5165\u6570\u5b57:") ;
try
{
str=brd.readLine() ;
num=Integer.parseInt(str) ;
break ;
}
catch(Exception e)
{
System.out.println("\u5bf9\u4e0d\u8d77\uff0c\u53ea\u80fd\u8f93\u5165\u6574\u6570\uff0c\u8bf7\u91cd\u65b0\u8f93\u5165\u3002") ;
}
}
System.out.println("\u4f60\u8f93\u5165\u7684\u6574\u6570\u662f: "+num) ;
}
}
\u8981\u8f93\u51fa\u7684\u662f\u6574\u6570\uff0c\u5f53\u7136\u8981\u6765\u4e2a\u5224\u65ad\u5982\u679c\u8f93\u5165\u7684\u4e0d\u662f\u65f6\u5c31\u91cd\u65b0\u63d0\u793a\u8f93\u5165\u7684\u8bf4\u3002
import java.util.Scanner;
public class Num {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in) ;
System.out.println("请输入一个数字：");
int a = sc.nextInt() ;
System.out.println("您输入的数字为：" + a);
}
}
Scanner类 在java.util包中
java自带的类
Scanner sc = new Scanner(System.in);
System.out.println("请输入第1个数");
numb[i]=sc.nextInt();
import java.util.Scanner;
public class TestMain {
public static void main(String[] args) {
// TODO Auto-generated method stub
int a=100;
Scanner in =new Scanner(System.in);
int n = in.nextInt();
System.out.println(n);
}
}
绛旓細鍙互浣跨敤 Java 涓殑 Scanner 绫绘潵瀹氫箟涓涓敭鐩樻壂鎻忓璞★紝鎺ョ潃浣跨敤 next() 鏂规硶鏉ユ帴鏀剁敤鎴疯緭鍏ョ殑瀛楃涓诧紝鍐嶉氳繃 Integer.parseInt() 鏂规硶灏嗗瓧绗︿覆杞崲涓烘暣鏁扮被鍨嬨備互涓嬫槸绀轰緥浠ｇ爜锛氫笂杩扮▼搴忓畾涔変簡涓涓暱搴︿负 10 鐨勬暣鍨嬫暟缁 score 鏉ュ瓨鏀炬垚缁╂暟鎹紝浣跨敤 for 寰幆浠庨敭鐩樿緭鍏 10 鍚嶅鐢熺殑鎴愮哗鏁版嵁锛岀劧鍚庡啀...
绛旓細1锛岀敤main鍑芥暟閲岀殑鍙傛暟args 閭ｄ箞鍦ㄨ繍琛岀殑鏃跺 鎶婂兼墦鍒板悗闈 濡傦細 java test value1 value2 鐒跺悗鍦╩ain鍑芥暟閲屽氨鍙互鐢╝rgs[0]鍜宎rgs[1]璁块棶鍒皏alue1锛屽拰value2浜 2.浣跨敤Scanner绫 import java.util.Scanner;Scanner scan=new Scanner(System.in);杩欐牱杩愯鐨勬椂鍊欏氨浼氱瓑寰呯敤鎴杈撳叆浜 閫氳繃scan.nextLine...
绛旓細Scanner sc = new Scanner(System.in); //Scanner瀵硅薄锛岀敤浜庢帴鏀剁敤鎴浠庨敭鐩樿緭鍏 int[] thisInt = new int[3]; //杩欎釜thisInt锛屾槸鏁扮粍锛岄暱搴︿负3锛屼篃灏辨槸璇村畠鍙互瀛樻斁3涓暣鍨嬪彉閲 for(int i = 0 ; i < 3 ; i++ ){ System.out.println("璇疯緭鍏ョ"+ (i+1) +"涓暟瀛");thisInt...
绛旓細Scanner sc=new Scanner(System.in);int j=sc.nextInt();濡傛灉閫氳繃浣跨敤 nextInt() 鏂规硶锛屾鎵弿鍣杈撳叆淇℃伅涓殑涓嬩竴涓爣璁板彲浠ヨВ閲婁负榛樿鍩烘暟涓殑涓涓 int 鍊笺傚叧閿瓧锛氫竴鑸槸鐢╯canner鐢ㄦ硶銆
绛旓細浠ｇ爜濡備笅锛歩mport java.util.Scanner;public class ScannerDemo{ public static void main(String[] args) throws Exception{ Scanner scan=new Scanner(System.in);System.out.println("璇杈撳叆鍐呭锛");String str=scan.nextLine();char[] s=str.toCharArray();for(int i=s.length-1;i>=0;i--...
绛旓細1.2 鍒╃敤瀛楄妭杈撳叆娴 瀛楄妭杈撳叆娴丼ystem.in 鏄被InputStream鐨勫父閲忓璞★紝璋冪敤read()鏂规硶鍙互浠庨敭鐩鎺ユ敹鏁版嵁銆瀹炵幇鐨勬楠ゆ槸锛氬厛鎶婃暟鎹鍏ュ瓧鑺傛暟缁勪腑锛岀劧鍚庡埄鐢ㄥ瓧鑺傛暟缁勫畾涔夊瓧绗︿覆锛屾渶鍚庢妸瀛楃涓茶浆鍖栦负闇瑕佺殑鏁版嵁绫诲瀷銆俻ackage InputTest;import java.io.*;public class DataKeyboardInput2 { /**鍒╃敤瀛楄妭杈撳叆...
绛旓細鐢⊿canner绫绘潵瀹屾垚鏂逛究 Scanner scanner=new Scanner(System.in);杩欎簡scanner杩欎釜瀵硅薄灏卞彲浠ヨ鍙閿洏杈撳叆浜 濡傦細scanner.nextInt();璇诲彇涓涓暣鏁 scanner.nextLine();璇诲彇涓琛屽瓧绗︿覆銆
绛旓細浣犲ソ銆傜ず渚嬩唬鐮佸涓嬶細import java.util.Scanner;public class Num { public static void main(String[] args) { Scanner sc = new Scanner(System.in) ;System.out.println("璇杈撳叆涓涓暟瀛楋細");int a = sc.nextInt() ;System.out.println("鎮ㄨ緭鍏ョ殑鏁板瓧涓猴細" + a);} } ...
绛旓細import java.util.*;public class a{ public static void main(String args[]){ int[] a = new int[10];Scanner reader = new Scanner(System.in);for(int i=0;i<10;i++){ a[i]=reader.nextInt();} } }
绛旓細鏂规硶涓锛氫粠鎺у埗鍙版帴鏀朵竴涓瓧绗︼紝鐒跺悗灏嗗叾鎵撳嵃鍑烘潵 public static void main(String [] args) throws IOException{ System.out.print(鈥淓nter a Char:鈥);char i = (char) System.in.read();System.out.println(鈥測our char is :鈥+i);} } 铏界劧姝ゆ柟寮瀹炵幇浜浠庨敭鐩鑾峰彇杈撳叆鐨勫瓧绗︼紝浣嗘槸System....
