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...
text/java 複製 {@code Scanner sc = new Scanner(new File("myNumbers")); while (sc.hasNextLong()) { long aLong = sc.nextLong(); } } </blockquote> The scanner can also use delimiters other than whitespace. This example reads several items in from a string: <blockquote> text/java...
最常见的是从标准输入(即键盘)读取数据,可以通过System.in作为输入源。 import java.util.Scanner;public class ScannerExample {public static void main(String[] args) {Scanner scanner = new Scanner(System.in);System.out.println("请输入一个整数:");int number = scanner.nextInt();System.out.println(...
importjava.util.Scanner;publicclassScannerExample{publicstaticvoidmain(String[]args){Scannerscanner=newScanner(System.in);System.out.print("请输入一行字符串: ");Stringstr=scanner.nextLine();//nextLineSystem.out.println("你输入的字符串是:"+str);}}...
import java.util.Scanner;public class SumExample {public static void main(String[] args) {Scanner scanner = new Scanner(System.in);System.out.print("请输入第一个整数:");int num1 = scanner.nextInt();System.out.print("请输入第二个整数:");int num2 = scanner.nextInt();int sum = num...
importjava.util.*;publicclassExample{publicstaticvoidmain(String args[]){System.out.println("请输入若干个数,每输入一个数用回车确认");System.out.println("最后输入一个非数字结束输入操作");Scanner reader=newScanner(System.in);double sum=0;int m=0;while(reader.hasNextDouble()){double x=reader...
ExampleGet your own Java Server importjava.util.Scanner;// Import the Scanner classclassMain{publicstaticvoidmain(String[]args){ScannermyObj=newScanner(System.in);// Create a Scanner objectSystem.out.println("Enter username");StringuserName=myObj.nextLine();// Read user inputSystem.out.println...
import java.util.Scanner; public class ArrayInputExample { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); // 创建一个长度为5的整数数组 int[] arr = new int[5]; System.out.println("请输入5个整数:"); // 使用循环为数组赋值 for (int i = 0; i ...
2 下面是一个实例：importjava.util.*;publicclassExample{publicstaticvoidmain(Stringargs[]){System.out.println("请输入若干个数,每输入一个数用回车确认");System.out.println("最后输入一个非数字结束输入操作");Scannerreader=newScanner(System.in);doublesum=0;intm=0;while(reader.hasNextDouble()){...
The strings that can be parsed as numbers by an instance of this class are specified in terms of the following regular-expression grammar, where Rmax is the highest digit in the radix being used (for example, Rmax is 9 in base 10). NonAsciiDigit: A non-ASCII character c for which ...