在Java中用正则表达式匹配字符串中的元音的程序
您可以在方括号“[ ]”中对所有必需的匹配字符进行分组,即元字符/子表达式“[ ]”匹配所有指定字符。因此,要匹配所有字母,请在其中指定元音字母,如下所示 −
[aeiouAEIOU]
示例 1
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class MatchVowels {
public static void main( String args[] ) {
String regex = "[aeiouAEIOU]";
System.out.println("Enter input string: ");
Scanner sc = new Scanner(System.in);
String input = sc.nextLine();
//Compiling the regular expression
Pattern.compile(regex);
//Compiling the regular expression
Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(input);
if(matcher.find()) {
System.out.println("The input string contains vowels");
} else {
System.out.println("The input string does not contain vowels");
}
}
}输出
Enter input string: hello how are you welcome The input string contains vowels
示例 2
import java.util.Scanner;
public class Test {
public static void main( String args[] ) {
String regex = "[aeiouAEIOU]";
System.out.println("Enter input string: ");
Scanner sc = new Scanner(System.in);
String input = sc.nextLine();
boolean result = input.matches(regex);
if(result) {
System.out.println("The input string contains vowels");
} else {
System.out.println("The input string does not contain vowels");
}
}
}输出
Enter input string: hello how are you welcome The input string does not contain vowels
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