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PublicData/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.mycompany</groupId>
+    <artifactId>PublicData</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.source>22</maven.compiler.source>
+        <maven.compiler.target>22</maven.compiler.target>
+        <exec.mainClass>com.mycompany.publicdata.PublicData</exec.mainClass>
+    </properties>
+</project>

PublicData/src/main/java/com/mycompany/publicdata/PublicData.java

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+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ */
+
+package com.mycompany.publicdata;
+
+/**
+ * This is the main class for the PublicData project.
+ * 
+ * Features:
+ * - Basic input validation method.
+ * - Prints a greeting message.
+ * 
+ * Author: hoang
+ */
+public class PublicData {
+
+    public static void main(String[] args) {
+        System.out.println("Hello World!");
+
+        // Example usage of the isValidData method
+        String data = "Sample data";
+        if (isValidData(data)) {
+            System.out.println("The data is valid.");
+        } else {
+            System.out.println("Invalid data.");
+        }
+    }
+
+
+    public static boolean isValidData(String data) {
+        return data != null && !data.trim().isEmpty();
+    }
+}