This is in java and please explain how you get to the final result and how expla

Question

This is in java and please explain how you get to the final result and how explain everything works

Assume cityList is a type of ListInterface<String>. What will print after the following statements are executed:

System.out.println(cityList.isEmpty());

cityList.add("burbank");

cityList.add("carlsbad");

cityList.add("davis");

cityList.add("granada");

cityList.add("sacramento");

cityList.add(2, "hayward");

cityList.add("menlo park");

cityList.add(4, "napa");

System.out.println(cityList.isEmpty());

System.out.println(cityList.getLength());

System.out.println(cityList.getEntry(2));

System.out.println(cityList.remove(2));

System.out.println(cityList.getEntry(2));

System.out.println(cityList.remove(1));

System.out.println(cityList.remove(2));

System.out.println(cityList.remove(3));

System.out.println(cityList.getLength());

System.out.println(cityList.replace(2, "oakland"));

System.out.println(cityList.getEntry(2));

System.out.println(cityList.getEntry(3));

cityList.clear();

System.out.println(cityList.getLength());

Explanation / Answer

Here is the code explained as comments for each step:

System.out.println(cityList.isEmpty());   //This returns true.
cityList.add("burbank");   //This city will be added and therefore, the cityList is: burbank
cityList.add("carlsbad");   //This city will be added and therefore, the cityList is: burbank, carlsbad
cityList.add("davis");       //This city will be added and therefore, the cityList is: burbank, carlsbad, davis,
cityList.add("granada");   //This city will be added and therefore, the cityList is: burbank, carlsbad, davis, granada
cityList.add("sacramento");   //This city will be added and therefore, the cityList is: burbank, carlsbad, davis, granada, sacramento
cityList.add(2, "hayward");   //This city will be added at position 2, the cityList is: burbank, hayward, carlsbad, davis, granada, sacramento
cityList.add("menlo park");   //This city will be added and therefore, the cityList is: burbank, hayward, carlsbad, davis, granada, sacramento, menlo park
cityList.add(4, "napa");   //This city will be added at position 4, the cityList is: burbank, hayward, carlsbad, napa, davis, granada, sacramento, menlo park
  
System.out.println(cityList.isEmpty());   //Returns false, and will be printed.
System.out.println(cityList.getLength());   //Returns the length of the cityList, and will print 8.
System.out.println(cityList.getEntry(2));   //Returns the second entry of cityList, and will print hayward.
System.out.println(cityList.remove(2));       //Removes the second entry of cityList, and will print hayward.  
                                   //Now, the new cityList is: burbank, carlsbad, napa, davis, granada, sacramento, menlo park
System.out.println(cityList.getEntry(2));   //Returns the second entry of cityList, and will print carlsbad.
System.out.println(cityList.remove(1));       //Removes the first entry of cityList, and will print burbank.
                                   //Now, the new cityList is: carlsbad, napa, davis, granada, sacramento, menlo park
System.out.println(cityList.remove(2));       //Removes the second entry of cityList, and will print napa.
                                   //Now, the new cityList is: carlsbad, davis, granada, sacramento, menlo park
System.out.println(cityList.remove(3));       //Removes the third entry of cityList, and will print granada.
                                   //Now, the cityList is: carlsbad, davis, sacramento, menlo park
System.out.println(cityList.getLength());   //Returns the length of the cityList, and will print 4.
System.out.println(cityList.replace(2, "oakland"));   //Replaces the second entry with oakland.
                                   //Now, the cityList is: carlsbad, oakland, sacramento, menlo park
System.out.println(cityList.getEntry(2));   //Returns the second entry of cityList, and will print oakland.
System.out.println(cityList.getEntry(3));   //Returns the third entry of cityList, and will print sacramento.
cityList.clear();                   //Clears all the entries of the cityList.
System.out.println(cityList.getLength());   //Returns the length of the cityList, and will print 0.

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