Testing java version

packages/java/src/main/java/io/github/gabriel_logan/Main.java

@@ -1,17 +1,71 @@
 package io.github.gabriel_logan;
 
+import io.github.gabriel_logan.types.ValidationResult;
+
 //TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
 // click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
 public class Main {
-		public static void main(String[] args) {
-				//TIP Press <shortcut actionId="ShowIntentionActions"/> with your caret at the highlighted text
-				// to see how IntelliJ IDEA suggests fixing it.
-				System.out.printf("Hello and welcome!");
-
-				for (int i = 1; i <= 5; i++) {
-						//TIP Press <shortcut actionId="Debug"/> to start debugging your code. We have set one <icon src="AllIcons.Debugger.Db_set_breakpoint"/> breakpoint
-						// for you, but you can always add more by pressing <shortcut actionId="ToggleLineBreakpoint"/>.
-						System.out.println("i = " + i);
-				}
+	private String getErrorMessage(int code) {
+		// Implemente esta função para retornar a mensagem de erro apropriada
+		return "";
+    }
+
+	/**
+	 * Checks if a string is empty or contains only whitespace.
+	 *
+	 * @param value the string to check
+	 * @return true if the string is empty or contains only whitespace, false otherwise
+	 * @throws IllegalArgumentException if the input value is not a string
+	 */
+	public static boolean isEmpty(String value) throws IllegalArgumentException {
+		if (value == null) {
+			throw new IllegalArgumentException("Input value must be a string.");
+		}
+
+		return value.trim().length() == 0;
+	}
+
+	public ValidationResult cpfIsValid(String cpf) {
+		try {
+			int numeroBase = 10;
+			int numeroBase2 = 11;
+			int somaTotal = 0;
+			int somaTotal2 = 0;
+
+			if (cpf.length() != 11) {
+				return new ValidationResult(false, getErrorMessage(2));
+			}
+
+			int primeiroVerificador = 0;
+			int segundoVerificador = 0;
+
+			for (int repetidor = 0; repetidor < 11; repetidor++) {
+				int multiplicador = Character.getNumericValue(cpf.charAt(repetidor)) * numeroBase;
+				numeroBase--;
+				somaTotal += multiplicador;
+
+				int multiplicador2 = Character.getNumericValue(cpf.charAt(repetidor)) * numeroBase2;
+				numeroBase2--;
+				somaTotal2 += multiplicador2;
+
+				int valorDeVerificacao = somaTotal - Character.getNumericValue(cpf.charAt(9));
+				int valorDeVerificacao2 = somaTotal2 - Character.getNumericValue(cpf.charAt(10));
+
+				primeiroVerificador = 11 - (valorDeVerificacao % 11);
+				segundoVerificador = 11 - (valorDeVerificacao2 % 11);
+			}
+
+			if (primeiroVerificador > 9) primeiroVerificador = 0;
+			if (segundoVerificador > 9) segundoVerificador = 0;
+
+			if (primeiroVerificador == Character.getNumericValue(cpf.charAt(9))
+					&& segundoVerificador == Character.getNumericValue(cpf.charAt(10))) {
+				return new ValidationResult(true, null);
+			}
+
+			return new ValidationResult(false, getErrorMessage(2));
+		} catch (Exception e) {
+			return new ValidationResult(false, getErrorMessage(3));
 		}
+	}
 }

packages/java/src/main/java/io/github/gabriel_logan/types/ValidationResult.java

@@ -0,0 +1,11 @@
+package io.github.gabriel_logan;
+
+public class ValidationResult {
+    public boolean isValid;
+    public String errorMsg;
+
+    public ValidationResult(boolean isValid, String errorMsg) {
+        this.isValid = isValid;
+        this.errorMsg = errorMsg;
+    }
+}