Refactoring, commenting

src/Global.java

@@ -21,7 +21,7 @@ public class Global {
 	
 	public void tick() {
 		if(srtf.isEmpty() && rr.isEmpty()) {Main.schedulersEmpty = true; return;}
-		else if(!srtf.isEmpty()) rr.stop();
+		else if(!srtf.isEmpty()) rr.stop(); //if there is a high priority task, we will choose that and not let the low priority scheduler work
 	
 		srtf.tick();
 		rr.tick();

src/Main.java

@@ -63,10 +63,9 @@ public class Main {
 			scheduler.tick();
 		}
 		
-		
-		
 		//writing output
 		//--------------
+		
 		System.out.println(scheduler.history);
 		
 		System.out.print(runningTasks.get(0).name + ":" + runningTasks.get(0).getWaitingTime());

src/RR.java

@@ -16,16 +16,28 @@ public class RR {
 	private ArrayDeque<Task> waitingQueue = new ArrayDeque<>(); //inactive tasks
 	private Task activeTask = null; //the active task; null if there are none
 	
+	/**
+	 * Constructor
+	 * @param global the multilevel scheduler to which this one belongs
+	 */
 	public RR(Global global) {
 		this.global = global;
 	}
 	
+	/**
+	 * Get back the right of scheduling tasks
+	 */
 	public void start() {
 		enabled = true;
 	}
 	
+	/**
+	 * lose the right of scheduling tasks (e.g. because a higher priority task came in)
+	 */
 	public void stop() {
 		enabled = false;
+		
+		//forcing the active task to sleep
 		runningFor = 0;
 		if (activeTask != null) waitingQueue.addLast(activeTask);
 		activeTask = null;
@@ -39,8 +51,7 @@ public class RR {
 	 * signals a processor tick
 	 */
 	public void tick() {
-		if(!enabled) {
-			//System.out.println("Running RR: " + ((activeTask == null) ? "null" : activeTask.name));
+		if(!enabled) { //if not enabled, every task waits
 			if (activeTask != null) activeTask.waitOne();
 			for(Task t : waitingQueue) t.waitOne();
 			return;
@@ -59,9 +70,7 @@ public class RR {
 			runningFor = 0;
 		}
 		
-		if (runningFor == timeSlice) runningFor = 0;
-		
-		//System.out.println("Running RR: " + ((activeTask == null) ? "null" : activeTask.name));
+		if (runningFor == timeSlice) runningFor = 0; //resetting runningFor even without swapping so that we will detect the next occasion when the time slice is over
 		
 		//registering time flow
 		for(Task t : waitingQueue) t.waitOne();
@@ -76,10 +85,4 @@ public class RR {
 		return activeTask==null && waitingQueue.size()==0;
 	}
 	
-	private String wqs() {
-		String ret = "";
-		for(Task t : waitingQueue) ret += t.name;
-		return ret;
-	}
-	
 }

src/SRTF.java

@@ -12,6 +12,10 @@ public class SRTF {
 	
 	private boolean needSwap = true; //stores if the active task should be changed
 	
+	/**
+	 * constructor
+	 * @param global the multilevel scheduler to which this one belongs
+	 */
 	public SRTF(Global global) {
 		this.global = global;
 	}
@@ -45,8 +49,6 @@ public class SRTF {
 			needSwap = false;
 		}
 		
-		//System.out.print("SRTF interrupt: " + activeTask.name + " ");
-		
 		//registering time flowing
 		for(Task t : waitingQueue) t.waitOne();
 		activeTask.runOne();