we don't need --name anymore to pick the package name

src/main/java/fr/packageviewer/ArgParse.java

@@ -28,13 +28,20 @@ public class ArgParse {
         try {
             // parse the argument from list of String
             jCommander.parse(args);
-            // store the argument parsed in the variable
-            distribution = params.distribution;
-            packet = params.packet;
+            if(params.help) {
+                jCommander.setProgramName("PackageViewer");
+                jCommander.usage();
+            } else {
+                // store the argument parsed in the variable
+                packet = params.packet;
+                distribution = params.distribution;
+            }
 
         } catch (Exception e) {
             // if the parsing failed, print the error message and exit the program
             System.out.println("You forgot something, please enter the package name and the distribution name if you want to search in a specific one");
+            jCommander.setProgramName("PackageViewer");
+            jCommander.usage();
             System.exit(0);
         }
 	}

src/main/java/fr/packageviewer/CommandLineParams.java

@@ -1,8 +1,5 @@
 package fr.packageviewer;
 
-import java.util.ArrayList;
-import java.util.List;
-
 import com.beust.jcommander.Parameter;
 
 /**
@@ -10,11 +7,13 @@ import com.beust.jcommander.Parameter;
  * @author Capelier-Marla
  */
 public class CommandLineParams {
+
     /**
-     * List of parameters given by the user
+     * Packet the user want to search, only parameter without names
      */
-    @Parameter
-    public List<String> parameters = new ArrayList<>();
+    @Parameter(description = "Packet to search",
+                required = true)
+    public String packet;
 
     /**
      * Distribution the user want to search packages in
@@ -25,10 +24,10 @@ public class CommandLineParams {
     public String distribution;
 
     /**
-     * Packet the user want to search
+     * Displays the help
      */
-    @Parameter(names = {"--packet", "-p"},
-            description = "Packet to search",
-            required = true)
-    public String packet;
+    @Parameter(names = {"--help", "-h"},
+               help = true,
+               required = false)
+    public boolean help = false;
 }

src/main/java/fr/packageviewer/Main.java

@@ -5,7 +5,7 @@ public class Main {
 	public static void main(String[] args) {
 		// send the command line arguments to the parser
 		ArgParse.parseArguments(args);
-		System.out.println(ArgParse.getDistribution());
 		System.out.println(ArgParse.getPacket());
+		System.out.println(ArgParse.getDistribution());
 	}
 }