Java Ungkapan biasa menyokong 3 pengendali logik iaitu −
import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Test { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter input text: "); String input = sc.nextLine(); String regex = "am"; //Creating a pattern object Pattern pattern = Pattern.compile(regex); //Matching the compiled pattern in the String Matcher matcher = pattern.matcher(input); if (matcher.find()) { System.out.println("Match occurred"); } else { System.out.println("Match not occurred"); } } }
Enter input text: sample text Match occurred
Enter input text: hello how are you Match not occurred
import java.util.regex.Matcher; import java.util.regex.Pattern; public class RegexExample { public static void main( String args[] ) { String regex = "Hello|welcome"; String input = "Hello how are you welcome to Tutorialspoint"; Pattern pattern = Pattern.compile(regex); Matcher matcher = pattern.matcher(input); int count = 0; while(matcher.find()) { count++; } System.out.println("Number of matches: "+count); } }
Demonstrasi masa nyata
Number of matches: 2
import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class CapturingGroups { public static void main( String args[] ) { System.out.println("Enter input text"); Scanner sc = new Scanner(System.in); String input = sc.nextLine(); String regex = "(.*)(\d+)(.*)"; //Create a Pattern object Pattern pattern = Pattern.compile(regex); //Now create matcher object. Matcher matcher = pattern.matcher(input); if (matcher.find( )) { System.out.println("Found value: " + matcher.group(0) ); System.out.println("Found value: " + matcher.group(1) ); System.out.println("Found value: " + matcher.group(2) ); System.out.println("Found value: " + matcher.group(3) ); } else { System.out.println("NO MATCH"); } } }
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