App.java: Print program version

Thanks to this Stack Overflow answer by mysomic
(https://stackoverflow.com/users/27241/mysomic) for explaining how to
get the program version in a Maven pom.xml context:
https://stackoverflow.com/questions/2712970/get-maven-artifact-version-at-runtime/12571330#12571330

1 files changed, 13 insertions, 0 deletions

diff --git a/src/main/java/com/teddywing/pdf_form_replace_font2/App.java b/src/main/java/com/teddywing/pdf_form_replace_font2/App.java
index c916f62..5e45dc0 100644
--- a/src/main/java/com/teddywing/pdf_form_replace_font2/App.java
+++ b/src/main/java/com/teddywing/pdf_form_replace_font2/App.java
@@ -20,7 +20,9 @@ import com.itextpdf.forms.PdfAcroForm;
 import com.itextpdf.forms.fields.PdfFormField;
 
 import java.io.IOException;
+import java.io.InputStream;
 import java.util.Map;
+import java.util.Properties;
 
 public class App {
 
@@ -50,6 +52,17 @@ public class App {
 
 				System.exit(0);
 			}
+
+			if (should_show_version) {
+				Properties properties = new Properties();
+				InputStream stream = App.class.getResourceAsStream("/META-INF/maven/com.teddywing.pdf_form_replace_font2/pdf-form-replace-font2/pom.properties");
+				properties.load(stream);
+				String version = properties.getProperty("version", "");
+
+				System.out.println(version);
+
+				System.exit(0);
+			}
 		}
 		catch (ParseException e) {
 			System.err.println("error: " + e.getMessage());