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What can you add action listeners to?

Consider the square method shown below that takes a non-negative int argument: public int square(int n) { return squareHelper(n, n); } public int squareHelper(int c, int n) { if (c == 1) { return n; } else { return n + squareHelper(c – 1, n); } } Assume that the last return statement in the squareHelper method is changed to this: return squareHelper(c – 1, n); What would a call to square(7) return?

Consider the Counter class below. public class Counter { public int count = 0; public int getCount() { return count; } public void increment() { count++; } } Using the class above and the variables declared below, what is the value of num1.equals(num2)? Counter num1 = new Counter(); Counter num2 = new Counter();

To ensure that an instance variable can only be accessed by the class that declared it, how should the variable be declared?

How many comparisons does selection sort make when sorting an array of length n?

What is the default layout manager of the content pane of a JFrame?

The method below is designed to return the smaller of two Comparable objects received as arguments. Assume that the objects are instances of the same class. Select the correct expression to complete the method. public static Comparable smaller(Comparable value1, Comparable value2) { if (_________________________ ) return value1; else return value2); }

Which class represents a more specific entity in an inheritance hierarchy?

How many times can an array with 4,096 elements be cut into two equal pieces?

Given the following code snippet for searching an array: int[] arr = {3, 8, 12, 14, 17}; int newVal = 15; int pos = Arrays.binarySearch(arr, newVal); What value will pos have when this code is executed?