superclass

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . Learn to Program: Crafting Quality Code Screenshot This is a video lecture from Coursera Learn to Program Crafting Quality Code Course. So there is a quiz during the video. class MyInt(int): # some code there They gave 4 answers where I need to choose a right one. I've choose my answers one by one but finally

问题 I want to use the superclass to call the parent method of a class while using a different class. Class AI(): ... for i in self.initial_computer_group: if i.rect.x == current_coords[0] and i.rect. y== current_coords[1]: i.move(coords_to_move[0], coords_to_move[1]) i.move() calls a method from an inherited class , when I want the original method from the parent class. self.initial_computer_group contains a list of objects which are completely unrelated to the AI class. I know I need to somehow

问题 I'm looking at the Notepad tutorial from the Android developer's site. I have a question about overridden functions calling the super-class of activities. For example, public class Notepadv3 extends ListActivity { ... @Override public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); menu.add(0, INSERT_ID, 0, R.string.menu_insert); return true; } } What's the point of the super.onCreateOptionsMenu() ? I looked at the developer's site and found this explanation: Call

问题 I've been learning about inheritance and I was just curious. I know that the subclass will automatically call the superclass's constructor even if you don't use the super() operator, so I wanted to know if it is even necessary for a subclass to have a constructor in it. 回答1: A subclass needs a constructor if the superclass does not have a default constructor (or has one that is not accessible to the subclass). If the subclass has no constructor at all, the compiler will automatically create a

问题 I'm trying to understand how does the inheritance work in play! But unsuccessfully yet. So, I have such superclass: @Inheritance(strategy = InheritanceType.TABLE_PER_CLASS) abstract class SuperClass extends Model { @Id @GeneratedValue(strategy = GenerationType.TABLE, generator = "SEQ_TABLE") @TableGenerator(name = "SEQ_TABLE") Long id; int testVal; } And 2 inherited classes: @Entity public class Sub extends SuperClass { String name; @Override public String toString() { return name; } }

问题 I have been stuck for a while trying to set a dynamic CHIOCES in form selection using python 2.7. I need the CHOICES to come from the query in my def update_file_choices . Here is the code in views.py: FILES_UPLOADED=[] ##choices varible for template def update_file_choices(): ##setup choices for RoomForm in launch page global FILES_UPLOADED uploads = FileUpload.objects.all() for file in uploads: FILES_UPLOADED.append((file.title,file.title)) print 'FILES IN UPLOADS:', file return(FILES

问题 I have this: public class Base { public function whoAmI() { trace("base"); } } public class Extended extends Base { public function Extended() { this.whoAmI() //prints extended super.whoAmI() //prints base var test = super; test.whoAmI() //prints extended } public override function whoAmI() { trace("extended"); } } The problem is when I do var test = super , it seems like this is assigned to test instead of super . Is it possible to do the assignment so that test.whoAmI() prints "base"? Edit

问题 I'm trying to dynamically change the text and the title of an Activity Main1 which extended to Text1 where the titles and textes, I did this code but never worked: public class MainText1 extends Text { String tx1=text1,tx2=text2,tx3=text3, tl1=title1, tl2=title2,tl3=title3,tl,tx; num = Integer.parseInt(getIntent().getStringExtra("somekey1")); // this data is coming from the menu, it depends on which button is clicked tl="tl"+num; tx="tx"+num; stringId1 = getApplicationContext().getResources()

问题 I want to sort some team base on their points (win: 3 points, draw: 1 points and defeat: 0 points). I have an array which contains some teams' names and their results, I have extracted their scores and then sorted them descending. Here is the code I have used: import java.util.*; import java.util.Map.Entry; public class SCAN{ public static void main(String[] args) { Map<String, Integer> points = new HashMap<>(); String[] challenges = new String[]{ "Team(A) 2 - 1 Team(C)", "Team(D) 3 - 1 Team

问题 Consider the following scenario: The class TemplateActivity extends Activity . Within onResume() it performs a validation of a boolean variable then, if false, it finishes the method and the activity, and starts a new activity, OtherActivity . When the class ChildActivity , which extends TemplateActivity , runs, it waits for super.onResume() to finish and then continue no matter if its super needs to start the Intent or not. The question: Is there a way to terminate the ChildActivity when the