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The _______ interface toolkit has a large set of user-interface components.

To use an interface, a class header should include which of the following?

In recursion, the non-recursive case is analogous to a loop ____.

Consider the following code snippet:   public class MyMouseListener { public void mousePressed(MouseEvent event) { double x; double y; _______ System.out.println(“x: ” + x + “, y: ” + y); } } Which of the following statements should be in the indicated position to print out where the mouse was pressed?

Consider the following code snippet: public class Vehicle { . . . public void setVehicleClass(double numberAxles) { . . . } } public class Auto extends Vehicle { . . . public void setVehicleClass(int numberAxles) { . . . } } Which of the following statements is correct?

The _______ interface toolkit has a large set of user-interface components.

To use an interface, a class header should include which of the following?

Consider the following code snippet:   public class MyMouseListener { public void mousePressed(MouseEvent event) { double x; double y; _______ System.out.println(“x: ” + x + “, y: ” + y); } } Which of the following statements should be in the indicated position to print out where the mouse was pressed?

A portion of your program implements a loop over n elements in which each step contains a fixed number of actions. What can you conclude about the running time of this section of code?

Select an appropriate expression to complete the following method, which is designed to return the number of elements in the parameter array numbers.  If a value appears more than once, it should be counted exactly once. public static int countElementsOnce(int[] numbers) { Set values = new HashSet(); for (int num: numbers) { values.add(num); } ______________________ }