Write a class ArrayMethods, where the main method asks the user to enter the number of inputs and stores them in an array called myList. Create a method printArray that prints the array myList. Create another method copyArray that copies the array using System.arraycopy, and multiplies each element in the copied array by 2, then finally returns the array to the main method. Invoke the printArray again to print the array returned by copyArray. In summary, see below. (!5 points) • main method does: asks user for inputs and stores in array. Invoke printArray. Invoke copyArray. Invoke printArray again. • printArray: void method, parameters passed is an array, prints an array • copyArray: array-returning method, parameters passed is an array, copies array, multiplies 2 to each element in the copied array, returns the copied array Sample Run Enter the number of items: 4 Enter the numbers: 2 3 4 6 Your printed array: 2 3 4 6 Your copied printed array: 4 6 8 12
Write a class ArrayMethods, where the main method asks the user to enter the
number of inputs and stores them in an array called myList. Create a method
printArray that prints the array myList. Create another method copyArray that copies
the array using System.arraycopy, and multiplies each element in the copied array by
2, then finally returns the array to the main method. Invoke the printArray again to
print the array returned by copyArray. In summary, see below. (!5 points)
• main method does: asks user for inputs and stores in array. Invoke printArray. Invoke copyArray.
Invoke printArray again.
• printArray: void method, parameters passed is an array, prints an array
• copyArray: array-returning method, parameters passed is an array, copies array, multiplies 2 to each
element in the copied array, returns the copied array
Sample Run
Enter the number of items: 4
Enter the numbers: 2 3 4 6
Your printed array: 2 3 4 6
Your copied printed array: 4 6 8 12
2. Write a class ArrayClass, where the main method asks the user to enter the four
numbers. Create a method printArray that prints the array whenever required (use
Array.toString method). Make the program run as shown in the Sample Run below.
Green is user input. (15 points)
Use Array.sort, Arrach.bianrySearch, Array.equals
Sample Run
List1, Enter four numbers: 2 3 3 2
List2, Enter four numbers: 6 2 5 4
List3, Enter four numbers: 5 2 4 6
Your original List1: [2, 3, 3, 2]
Your original List2: [6, 2, 5, 4]
Your original List3: [5, 2, 4, 6]
Sorted List1 is: [2, 2, 3, 3]
Enter a number from the sorted List1 to search for: 3
Value 3 is in index 2 (or position 3)
List that are the same when sorted: [2, 4, 5, 6]
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