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...
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("你输入的整数是:" + number);scanner.close(); // 关闭Scanner对象...
importjava.util.Scanner;publicclassKeyboardInputExample{publicstaticvoidmain(String[]args){// 创建与键盘输入相关联的Scanner对象Scanner scanner=newScanner(System.in);// 获取用户输入的姓名System.out.print("请输入您的姓名: ");String name=scanner.nextLine();// 获取用户输入的年龄System.out.print("请...
publicclassScannerExample{publicstaticvoidmain(String[]args){System.out.println("输入:");Scannersc=newScanner(System.in);intm=sc.nextInt();intn=sc.nextInt();int[]num1=newint[m];//第一个数组的大小int[]num2=newint[n];//第二个数组大小for(inti=0;i<m;i++){//为第一个数组读取元素...
In this quick tutorial, we’ll illustrate how to use theJavaScannerclass – to read input and find and skip patterns with different delimiters. 2. Scan a File First – let’s see how to read a file usingScanner. In the following example – we read a file containing “Hello world” int...
importjava.io.File;importjava.io.FileNotFoundException;importjava.util.Scanner;publicclassFileReadExample{publicstaticvoidmain(String[] args){try{Filefile=newFile("example.txt");Scannerscanner=newScanner(file);while(scanner.hasNextLine()) {Stringline=scanner.nextLine(); ...
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...
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: "); ...
Example importjava.util.Scanner;classMain{publicstaticvoidmain(String[]args){ScannermyObj=newScanner(System.in);System.out.println("Enter name, age and salary:");// String inputStringname=myObj.nextLine();// Numerical inputintage=myObj.nextInt();doublesalary=myObj.nextDouble();// Output inpu...
importjava.util.Scanner;publicclassExample{publicstaticvoidmain(String[] args){//我们可以输入多个数字,并求其总和与平均数,每输入一个数字用回车确认。//通过输入非数字来结束输入并输出执行结果Scannerscanner=newScanner(System.in);//和doublesum=0;// 计算输入了多少个数字intm=0; ...