Pre-compile the regex pattern into a Pattern object and reuse

core-java-modules/core-java-11/src/test/java/com/baeldung/pattern/PatternJava11UnitTest.java

@@ -0,0 +1,31 @@
+package com.baeldung.pattern;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.function.Predicate;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+public class PatternJava11UnitTest {
+
+    private static final String VALID_NAME = "Fabio Silva";
+    private static final String INVALID_NAME = "Fabio Luis Silva";
+    private static final List<String> NAMES_TO_VALIDATE = Arrays.asList(VALID_NAME, INVALID_NAME);
+    private static final Pattern FIRST_LAST_NAME_PRE_COMPILED_PATTERN = Pattern.compile("[a-zA-Z]{3,} [a-zA-Z]{3,}");
+
+    @Test
+    public void givenPreCompiledPattern_whenCallAsMatchPredicate_thenReturnMatchPredicateToMatchesThePatternInTheListElements() {
+        Predicate<String> patternAsMatchPredicate = FIRST_LAST_NAME_PRE_COMPILED_PATTERN.asMatchPredicate();
+        List<String> validatedNames = NAMES_TO_VALIDATE.stream()
+                .filter(patternAsMatchPredicate)
+                .collect(Collectors.toList());
+
+        assertTrue(validatedNames.contains(VALID_NAME));
+        assertFalse(validatedNames.contains(INVALID_NAME));
+    }
+}