Write Java code for the following: Create an Arraylist that can hold Integer objects. Check and display whether the Arraylist is empty or not. Add an element 50 into the Arraylist. Add another element 60 in the position of 0 in the Arraylist. Replace the element to 70 in index 1.

Explain the fundamental difference between an array and an arraylist.

public static ArrayList findExactString(String s, ArrayList myArray) { return null; } // Use the above method, findExactString, as a helper method to implement addWithoutDuplication method. The addWithoutDuplication method has the following properties: 1- It takes two arguments, a string s and an ArrayList myArray of type string. 2- It returns an integer which represents the number of occurrences of the string s in myArray while attempting to add it. 3- If myArray is null, it returns -1 4- If adds the string s to the end of the ArrayList myArray if the string s is not already there. public static int addwithout Duplication(String s, ArrayList myArray) { return -1;

in java

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

5. How to find all the leaders in an integer array in java? An element is leader if it is greater than all the elements to its right side. And the rightmost element is always a leader. For example int the array {16, 17, 4, 3, 5, 2}, leaders are 17, 5 and 2..

Java Complete the method with explaining, thank you!

Execute the following statements over initially empty ArrayList myList one after another (cascade). Explain what was changed after each statement (what did it do?) myList.add("z"); ArrayList content: Your explanation (where this output came from): myList.add(0, "a"); ArrayList content: Your explanation (where this output came from): myList.add("t"); ArrayList content: Your explanation (where this output came from): myList.add(2,"w"); ArrayList content: Your explanation (where this output came from): myList.set(0,"b"); ArrayList content: Your explanation (where this output came from):

JAVA Chapter 9 Multidimensional Arrays and the ArrayList Class Write a value returning method that returns the sum of the elements in the last column of each row in a two-dimensional array of ints. Include code to test your method.

Write a Java program tat prompts user for a list of integers with 0 as the last value.Save the values in an array. Assume there can be maximum 100 values. Theprogram should have the following methods:- A method that takes the array as parameter and updates each value in thearray to the square of the value.- Another method that takes the original and modified arrays as parametersand displays the original and the squared values.

Write Java statements that use a for each loop to cycle through all the elements in an ArrayList of doubles named grades.

Complete the method endsInFive that takes as arguments a 2D-array of integers and an integer value that represents a column index in the array. endsInFive returns the number of values in the column that end in 5. It is possible that the array is ragged, meaning that the number of columns in each row is different. For example, 2 is returned if the following 2D-array is passed as the first argument of endsInFive and the integer 3 as the second argument (the values 25 and 115 end in five at column index 3).

in java programming answer the following: Given an array called myArr (created as ArrayList<T>) and contains the {1,2,3,4,5,6,7}. (a) what would be the contents of this array after myArr.add(10). b) write the content of myArr after myArr.add(4, 11);