[Refactoring] Command pattern of actionPerformed() in LaneView.java

LaneView.java

@@ -29,6 +29,7 @@ public class LaneView implements LaneObserver, ActionListener {
 
 	JButton maintenance;
 	Lane lane;
+	private ButtonCommand command;  // the Command instance for Command pattern
 
 	public LaneView(Lane lane, int laneNum) {
 
@@ -216,8 +217,19 @@ private void updateBallScores(LaneEvent le, int k){ // 점수에 대해서 전
 
 	public void actionPerformed(ActionEvent e) {
 		if (e.getSource().equals(maintenance)) {
-			lane.pauseGame();
+			setCommand(new LaneViewMaintenanceCommand(this));
 		}
+		buttonPressed();
 	}
 
+	// The Invoker holds a command and can use it to call a method
+	public void setCommand(ButtonCommand command) {
+		this.command = command;
+	}
+	// Call the execute() method of the command
+	public void buttonPressed() {
+		command.execute();
+	}
+
+
 }

LaneViewMaintenanceCommand.java

@@ -0,0 +1,11 @@
+class LaneViewMaintenanceCommand implements ButtonCommand {
+    private LaneView theView;
+
+    public LaneViewMaintenanceCommand(LaneView theView) {
+        this.theView = theView;
+    }
+
+    public void execute() {
+        theView.lane.pauseGame();
+    }
+}