用java语言怎么实现从键盘输入一个数？ 要从键盘上输入一个数java代码怎么写
\u7528java\u8bed\u8a00\u600e\u4e48\u5b9e\u73b0\u4ece\u952e\u76d8\u8f93\u5165\u4e00\u4e2a\u6570\u4f60\u597d\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a
import java.util.Scanner;
public class Num {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in) ;
System.out.println("\u8bf7\u8f93\u5165\u4e00\u4e2a\u6570\u5b57\uff1a");
int a = sc.nextInt() ;
System.out.println("\u60a8\u8f93\u5165\u7684\u6570\u5b57\u4e3a\uff1a" + a);
}
}
\u4f60\u597d\uff0c
\u5047\u8bbe\u662f\u8f93\u5165\u6574\u6570\uff1a
Scanner san = new Scanner(System.in); //\u58f0\u660e\u8f93\u5165\u53d8\u91cfsan\u5e76\u521d\u59cb\u5316\uff1b
int i = san.nextInt(); //\u5c06\u8f93\u5165\u7684\u53d8\u91cfsan\u7684\u503c\u8d4b\u7ed9\u6574\u6570\u53d8\u91cf i \uff1b
System.out.println(i); //\u8f93\u51fai \u3002
\u5c31\u662f\u5229\u7528Scanner\u8fd9\u4e2a\u7c7b\u3002
\u5e0c\u671b\u53ef\u4ee5\u5e2e\u52a9\u5230\u4f60 ~O(\u2229_\u2229)O~
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();
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