Scanner类是Java中用于读取输入的常用工具。可以使用Scanner类从用户处获取整数输入。以下是一个示例: importjava.util.Scanner;publicclassIntegerInputExample{publicstaticvoidmain(String[]args){Scannerscanner=newScanner(System.in);System.out.print("请输入一个整数: ");intnumber=scanner.nextInt();System.out....
利用Scanner 实现从键盘读入integer或float 型数据 import java.util.*; public class test { public static void main(String args[]) { Scanner in=new Scanner(System.in); //使用Scanner类定义对象 System.out.println("please input a float number"); float a=in.nextFloat(); //接收float型数据 System...
import java.util.Scanner; public class InputIntExample { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); // 创建一个Scanner对象szcto.com/555558,用于从标准输入(键盘)读取数据 System.out.println("请输入一个整数:"); int number = scanner.nextInt(); // 调...
一,利用 Scanner 实现从键盘读入integer或float 型数据 1importjava.util.*;2publicclasstest {3publicstaticvoidmain(String args[])4{5Scanner in=newScanner(System.in);//使用Scanner类定义对象6System.out.println("please input a float number");7floata=in.nextFloat();//接收float型数据8System.out.pr...
input = scanner.next(); int a = Integer.parseInt(input); System.out.println("输入一个字符串b:"); input = scanner.next(); String b = input; System.out.println("输入一个浮点数c:"); input = scanner.next(); float c = Float.parseFloat(input); ...
public class Main { public static void main(String[] args) { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); try { System.out.print(请输入一个整数:); int num = Integer.parseInt(br.readLine()); System.out.println(您输入的整数是: + num); ...
A simple text scanner which can parse primitive types and strings using regular expressions. A Scanner breaks its input into tokens using a delimiter pattern, which by default matches whitespace. The resulting tokens may then be converted into values of different types using the various next ...
try{System.out.print("Enter an integer: ");intnumber=scanner.nextInt();}catch(InputMismatchExceptione){System.out.println("That's not an integer!");} hasNext 方法 在尝试读取特定类型的数据之前,请使用以下方法hasNextXXX()检查输入是否属于预期类型: ...
Scanner 类在 java.util 包中,因此需要在代码中使用 import 语句导入该包。 下面是一个使用 Scanner 类从键盘接收输入的简单示例: import java.util.Scanner; public class ScannerTest { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("请输入一个...
import java.util.Scanner;public class ConvInteger { public static void announce () { //announce program and print out user instruction System.out.println("ConvInteger – Conversion to Hexadecimal and Binary Representation");} public static void main (String [] args) { System.out....