implemented autocomplete feature

bin/commandLine/_en.properties

 app.name=CommandLine
-version.code=1
-version.name=1.0.0
-version.date=26.07.16
+version.code=0
+version.name=1.1.0
+version.date=16.09.16
 
 help.list=list - lists all possible commands
 help.help=help - shows help for given command\nSYNTAX:  help [COMMAND]
 help.clear=clear - clears the history
+help.shortcuts=shortcuts - lists all available shortcuts
 
 error.general=An error occurred.
 error.unknown.command=Unknown command. Use \"list\" for a list of possible commands.
 error.invalid.arguments=Invalid arguments. Use \"help commandname\" for help.
 error.no.help=Unknown command as parameter. Can't display help. Use \"list\" for a list of possible commands.
+
+info.shortcuts=[ENTER] - execute command\n[UP] - scroll through recently used commands\n[ESC] - clear input\n[TAB] - autocomplete
\ No newline at end of file

src/commandLine/CommandLineController.java

 package commandLine;
 
 import java.util.ArrayList;
+import java.util.Comparator;
 
 import commands.Command;
 import commands.HistoryEntry;
 import commands.HistoryType;
 import commands.PossibleCommands;
+import javafx.application.Platform;
 import javafx.event.EventHandler;
 import javafx.fxml.FXML;
 import javafx.scene.control.TextArea;
@@ -15,6 +17,7 @@ import javafx.scene.input.KeyEvent;
 
 /**
  * Controller for the CommandLine stage
+ * 
  * @author deadlocker8
  *
  */
@@ -54,6 +57,12 @@ public class CommandLineController
 				{
 					clearConsole();
 				}
+				
+				if(event.getCode().equals(KeyCode.TAB))
+				{
+					autocomplete();
+					event.consume();
+				}
 			}
 		});
 
@@ -176,6 +185,70 @@ public class CommandLineController
 				textfieldInput.setText(commandLine.globalHistory.get(commandLine.lastShownCommand - 1).getText());
 				commandLine.lastShownCommand--;
 			}
+			
+			Platform.runLater(()->
+			{				
+				textfieldInput.positionCaret(textfieldInput.getText().length());				
+			});
+		}
 	}
+	
+	private void autocomplete()
+	{
+		String input = textfieldInput.getText().replace("\n", "");
+
+		if(input.equals(""))
+		{			
+			return;
+		}
+		
+		ArrayList<Command> commands = PossibleCommands.possibleCommands;
+		
+		//filter possible commands
+		ArrayList<Command> filteredCommands = new ArrayList<>();
+		for(Command currentCommand : commands)
+		{
+			if(currentCommand.getKeyword().startsWith(input))
+			{
+				filteredCommands.add(currentCommand);
+			}
+		}	
+		
+		//sort commands alphabetically		
+		filteredCommands.sort(new Comparator<Command>()
+		{
+			@Override
+			public int compare(Command o1, Command o2)
+			{
+				return o1.keyword.compareTo(o2.keyword);				
+			}
+		});		
+		
+		if(filteredCommands.size() == 1)
+		{
+			textfieldInput.setText(filteredCommands.get(0).getKeyword());
+		}
+		else
+		{
+			StringBuilder sb = new StringBuilder();		
+			sb.append(">>> Possible commands for \"" + input + "\":\n");
+			for(int i = 0; i < filteredCommands.size(); i++)
+			{
+				sb.append(filteredCommands.get(i).keyword);
+				if(i != (filteredCommands.size()-1))
+				{
+					sb.append("\n");
+				}
+			}
+			
+			print(sb.toString());	
+			
+			textfieldInput.setText(input);
+		}
+		
+		Platform.runLater(()->
+		{				
+			textfieldInput.positionCaret(textfieldInput.getText().length());				
+		});
 	}
 }
\ No newline at end of file

src/commandLine/_en.properties

 app.name=CommandLine
-version.code=1
-version.name=1.0.0
-version.date=26.07.16
+version.code=0
+version.name=1.1.0
+version.date=16.09.16
 
 help.list=list - lists all possible commands
 help.help=help - shows help for given command\nSYNTAX:  help [COMMAND]
 help.clear=clear - clears the history
+help.shortcuts=shortcuts - lists all available shortcuts
 
 error.general=An error occurred.
 error.unknown.command=Unknown command. Use \"list\" for a list of possible commands.
 error.invalid.arguments=Invalid arguments. Use \"help commandname\" for help.
 error.no.help=Unknown command as parameter. Can't display help. Use \"list\" for a list of possible commands.
+
+info.shortcuts=[ENTER] - execute command\n[UP] - scroll through recently used commands\n[ESC] - clear input\n[TAB] - autocomplete
\ No newline at end of file

src/commands/CommandShortcuts.java

+package commands;
+
+/**
+ * Lists all available Shortcuts
+ * @author deadlocker8
+ *
+ */
+public class CommandShortcuts extends Command
+{
+	public CommandShortcuts()
+	{		
+		super.keyword = "shortcuts";		
+		super.numberOfParams = 0;
+		super.helptText = "help.shortcuts";
+	}
+
+	@Override
+	public void execute(String[] command, CommandBundle bundle)
+	{		
+		bundle.getController().print("Available Shortcuts:");
+		bundle.getController().print(bundle.getLanguageBundle().getString("info.shortcuts"));
+	}
+}
\ No newline at end of file

src/commands/PossibleCommands.java

@@ -13,6 +13,7 @@ public class PossibleCommands
 	public static final ArrayList<Command> possibleCommands = new ArrayList<>(Arrays.asList(
 				new CommandList(),
 				new CommandHelp(),
-				new CommandClear()				
+				new CommandClear(),
+				new CommandShortcuts()
 			));	
 }
\ No newline at end of file