Engineering Science 1036A/B Lecture 27: Class and Objects: Program Examples

Programming section (30 points total) The following code must all go inside of a class called Midterm. 21. Write a method sum which takes as input an array of int and returns the sum of the elements in the array. For example, if the array contains 10 2 3, your method should return 15.

7. Consider the Node class in the appendix. The following code Nodell myNodes = new Node [10]; for ( int i = 0; i < myNodes.length - 1; i++) { myNodes[i] = new Node (i); myNodes[i].setNext (myNodes [i+1]); will produce an array of 10 Node objects. Each Node will have its next attribute pointing to the next Node in the array (except for the last one, which has next = null). (A) FALSE (B) TRUE

22. Write a method removeNegatives which takes as input an array of int and returns a new array in which only the non-negative values are kept. For example, if the original array contains 10 -2 0 4 -1, your method should return an array of length 3 containing 10 0 4.