引用属性文件时的NullPointerException

import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;

public class PropertyLoader {
    public static void main(String[] args) {
        Properties prop = new Properties();
        try (FileInputStream fis = new FileInputStream("path/to/your/properties/file.properties")) {
            prop.load(fis);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

public class PropertyUtil {
    private static Properties properties;

    static {
        properties = new Properties();
        try (FileInputStream fis = new FileInputStream("path/to/your/properties/file.properties")) {
            properties.load(fis);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static String getProperty(String key) {
        return properties.getProperty(key);
    }
}

public class Main {
    public static void main(String[] args) {
        String value = PropertyUtil.getProperty("someKey");
        if (value != null) {
            System.out.println("Property value: " + value);
        } else {
            System.out.println("Property not found or null.");
        }
    }
}