Arraylist - Study guides, Class notes & Summaries

AP Computer Science Principles Chapter 2 Graded A+ What is the output of this code snippet? ```java int a = 5; int b = 3; Sln(a - b); ``` The output is `2`. How do you call a method named `calculate` from an object `calc`? Use `late();`. What happens if you don’t provide a constructor in a class? 2 Java provides a default constructor that initializes objects with default values. How can you access a private field in a class? Use a public getter method d...

What is the difference between an Interface and an Abstract class? ~ "An abstract class can have instance methods that implement a default behavior. An Interface can only declare constants and instance methods, but cannot implement default behavior and all methods are implicitly abstract. An interface has all public members and no implementation. An abstract class is a class which may have the usual flavors of class members (private, protected, etc.), but has some abstract methods." ...

Name Answer Is the new operator required for Strings? no, it's optional In a string, When does + concat and when does it perform add If either operand involved in the + expression is a String, concatenation is used; otherwise, addition is used. What are 13 methods of the String class? cceeeilrsstttcharAt(),concat(),endsWith(), equals(), equalsIgnoreCase(), indexOf(),length(), replace(), startsWith(), substring(), toLowerCase(), toUpperCase(), andtrim() What are 10 methods of the Str...

CMSC 433 All Exams Solutions 2023/24 Q1.1 2 Points Synchronized List offers better performance than a Copy OnWrite ArrayList when there are frequent iteration operations. Q1.2 2 Points ____ is a Java keyword that can be used to inform threads in the waitset of an object. notifyAll Q1.3 2 Points ___ is a thread state when it is waiting to acquire a lock. Blocked Q1.4 2 Points A Thread that has ended can be restarted. ý True ź False 5/5/2021 View Submission | Gradescope Q2 ...

What is it called when a programmer uses a parameter (instead of an actual data type) when creating an object of a class or invoking a method? Such definitions are called generics How many parameter types can be used when defining a class? Can they be different? A type parameter can have any reference type (i.e., any class type) plugged in for the type parameter What are the restrictions on parameter types? (Can they be classes, interfaces, arrays, primitives, exceptions, nodes, etc.) How ar...

Theory Programming Languages2/ 70+ Question with Verified Solutions/ . Terms like: explicit declaration - Answer: a program statement used for declaring variable types (int x;) implicit declaration - Answer: a default mechanism for specifying types of variables (the first appearance of the variable in the program, FORTRAN and Perl) type inferencing - Answer: determine the data types of variables (Java ArrayList<Integer>) type binding - Answer: type specified through an assignmen...

COSC-2336_ Collections - Programming Fundamentals III Final Exam Correct Questions and Answers updated 100% A+ Graded A list in which each stored element is associated with a reference to its successor is called - CORRECT ANSWER-a linked list To allocate storage for its elements, an array-based list such as ArrayList uses - CORRECT ANSWER-contiguous allocation To allocate storage for their elements, linked lists use - CORRECT ANSWER-linked allocation A linked list is represented by a...

01. Which interface in the ion package can return a primitive type? a) ToDoubleFunction b) Supplier c) BiFunction d) LongConsumer a) ToDoubleFunction 02. Which two statements independently compile? (Choose two.) a) List<? super Short> list = new ArrayList<Number>(); b) List<? super Number> list = new ArrayList<Integer>(); c) List<? extends Number> list = new ArrayList<Byte>(); d) List<? extends Number> list = new ArrayList<Object>(...

Access modifier correct answers States which classes can access a component of the current class. This helps with encapsulation. The modifiers you will see are: + public: any class can access this element - private: this element can only be accessed by the object in which it is contained * package: this element can only be accessed by the object in which it is contained or in by any instance of a derived class <none> package. Accessor correct answers A method used to examine an at...

Game Design Final Exam Questions with Verified Solutions A programming language is a formal computer language that is used to communicate instructions to a computing device in order to control the computer's behavior in some way. True A number of elements in a specific order is: an array A function that contains arithmetic symbols (e.g. +, <, =/) is an operator. True An instance is: a single occurence A collision volume is called: a region Which of the following is NOT...