Java Scanner class is part of the java.util package. It was introduced in Java 1.5 release. The Scanner is mostly used to receive user input and parse them into primitive data types such as int, double or default String. It’s a utility class to parse data using regular expressions by g...
ScannerDemo.java 文件代码: importjava.util.Scanner;publicclassScannerDemo{publicstaticvoidmain(String[]args){Scannerscan=newScanner(System.in);//从键盘接收数据//next方式接收字符串System.out.println("next方式接收:");//判断是否还有输入if(scan.hasNext()){Stringstr1=scan.next();System.out.println(...
方法/步骤 1 首先，创建一个class 2 创建一个main方法，导入java.util.Scanner(一定要写在package下面！！！）3 输入以下代码，注释部分详细说明了每一行代码的用途。package com.Test;import java.util.Scanner;public class MyClass {public static void main(String arg[]){System.out.println("请输入学科");...
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.print("请输入一个字符串: "); String str = scanner.nextLine(); System.out.print("请输入一个整数: "); int num = scanner.nextInt(); System.out...
//导入包// import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc=new Scanner(System.in); //从键盘接收数据// String s=sc.next(); System.out.println(s); } } 效果: 为了获得所以数据,我们修改输入数据的分隔符,添加sc.useDelimiter(“\n”); 代...
import java.util.Scanner; /** * 使用Scanner在程序需要的时候输入参数 */ public class TestScanner { public static void main(String[] args) { Scanner sc = new Scanner(http://System.in); System.out.println("请输入用户名:"); //遇到空格停止接收 String name = sc.next(); System.out.printl...
import java.util.Scanner; import java.util.Arrays; public class MyScanner { public static void main(String[] args) { //创建对象 Scanner sc = new Scanner(System.in); System.out.println("输入数据:"); //多行输入 int n = sc.nextInt(); ...
importjava.util.Scanner;publicclassGetBodyFat{publicstaticvoidmain(String[]args){// 初始化腰围floatwaistline=0f;// 初始化体重floatweight=0f;// 声明浮点型参数 a,b,bodyFatWeight(脂肪重量)floata,b,bodyFatWeight;Scannerscanner=newScanner(System.in);System.out.println("请输入您的腰围(cm):");if...
ScannerDemo.java 文件代码: vimport java.util.Scanner;publicclassScannerDemo {publicstaticvoidmain(String[] args) { Scanner scan=newScanner(System.in);//从键盘接收数据inti = 0;floatf = 0.0f; System.out.print("输入整数:");if(scan.hasNextInt()){//判断输入的是否是整数i =scan.nextInt() ...
import java.util.Scanner; 接下来,我们就可以创建Scanner对象了。通常情况下,我们将Scanner与System.in关联起来,以便从键盘读取用户输入的数据。具体做法如下: java Scanner scanner = new Scanner(System.in); 二、基本的读取方法 1. next()方法 next()方法用于读取用户输入的下一个完整单词,它会自动过滤掉分隔符...