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法律研究使用 Java 正則表示式檢查有效的移動號碼的程式
可以使用以下正則表示式匹配有效的移動號碼 -
"\d{10}"- 有效的移動號碼通常有 10 位數字（在印度）。
- 元字元 "\d" 匹配數字 0 至 9。
- 量詞 ex{n} 表示重複 ex n 次。
示例 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");
}
}
}輸出 1
Enter your name: krishna Enter your Phone number: 9848022338 Given phone number is valid
輸出 2
Enter your name: krishna Enter your Phone number: 5465 Given phone number is not valid
輸出 3
Enter your name: krishna Enter your Phone number: 984802354655 Given phone number is not valid
示例 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");
}
}
}輸出 1
Enter your Phone number: 9848022338 Given phone number is valid
輸出 2
Enter your Phone number: 123 Given phone number is not valid
輸出 3
Enter your Phone number: 123654788755 Given phone number is not valid
更新於:2019-11-21
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