程序使用Java正则表达式检查有效的手机号码
您可以使用以下正则表达式匹配有效的手机号码-
"\\d{10}"有效的手机号码通常有10位数字（在印度）。
元字符“\d”匹配从0到9的数字。
量词ex{n}建议重复exn次。
例子1
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class PhoneNumberExample {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter your name: ");
String name = sc.nextLine();
System.out.println("Enter your Phone number: ");
String phone = sc.next();
//Regular expression to accept valid phone number
String regex = "\\d{10}";
//Creating a pattern object
Pattern pattern = Pattern.compile(regex);
//Creating a Matcher object
Matcher matcher = pattern.matcher(phone);
//Verifying whether given phone number is valid
if(matcher.matches()) {
System.out.println("Given phone number is valid");
} else {
System.out.println("Given phone number is not valid");
}
}
}输出1
Enter your name: krishna Enter your Phone number: 9848022338 Given phone number is valid
输出2
Enter your name: krishna Enter your Phone number: 5465 Given phone number is not valid
输出3
Enter your name: krishna Enter your Phone number: 984802354655 Given phone number is not valid
例子2
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter your Phone number: ");
String phone = sc.next();
//Regular expression to accept valid phone number
String regex = "\\d{10}";
//Matching the given phone number with regular expression
boolean result = phone.matches(regex);
if(result) {
System.out.println("Given phone number is valid");
} else {
System.out.println("Given phone number is not valid");
}
}
}输出1
Enter your Phone number: 9848022338 Given phone number is valid
输出2
Enter your Phone number: 123 Given phone number is not valid
输出3
Enter your Phone number: 123654788755 Given phone number is not valid