This is needed in Java    Given an existing ArrayList named friendList, find the first index of a friend named Sasha and store it in a new variable named index.

using java programming code the following

True or False? In Java, an array is a primitive type that need not be instantiated.

Assume class ArrayStack has been deńned using the implementation in your textbook and that myStack has been initialized so it is empty. Type the EXACT output of the following code segment. You may assume that the code compiles and executes without errors. ArrayStack my5tack; int i = 1; int j = 2; int k = 3; int n = 4; myStack.push (); myStack.push (k); i = my5tack.peek (0: myStack.pop (); myStack.push (n); k = myStack.peek (); myStack.pop (); my5tack.push (n); my5tack.push (1); myStack.push (k); while (Imy5tack.isEmpty () { i = my5tack.peek (); my5tack.pop (); cout << i<< ""; cout << endl;

Design a class called Post. This class models a StackOverflow post. It should have properties for title, description and the date/time it was created. We should be able to up-vote or down-vote a post. We should also be able to see the current vote value. In the main method, create a post, up-vote and down-vote it a few times and then display the the current vote value.

Java code  12. Given an existing ArrayList named contactList, find the number of contacts in the ArrayList and store it in the existing variable named numContacts.

JAVA you guys returned the question and said that it is a writing assignment but it is not. It is a java question, multiple-choice no coding. Please help me with this.

In Java: Write a method that multiplies all elements in the array by 3 and returns it to the main method.

Java ArrayLists can only be filled with reference type data, so you cannot fill them with primitive type data. How can you work around this with integers? (How can you have an ArrayList filled with integers?)

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