Problem 33 How do you cause a Timer object ... [FREE SOLUTION]

Chapter 14: Problem 33

How do you cause a Timer object to begin generating action events?

Short Answer

Expert verified

Answer: To create and start a Timer object in Java, follow these steps: 1. Import necessary classes and interfaces: `java.awt.event.ActionEvent`, `java.awt.event.ActionListener`, and `javax.swing.Timer`. 2. Implement the `ActionListener` interface in your class, providing a definition for the `actionPerformed` method, which will be called when the timer generates an action event. 3. Create a Timer object with a specified delay (in milliseconds) and an `ActionListener`. The delay determines the interval between consecutive action events generated by the timer. 4. Start the Timer object, using the `start()` method, to begin generating action events. The `actionPerformed` method will be called each time an action event is generated.

Step by step solution

Import necessary classes and interfaces

To work with a Timer object, first import the following classes and interfaces: ```java import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.Timer; ```

Implement ActionListener interface

Implement the ActionListener interface in the class where you want to use the Timer object, and provide a definition for the actionPerformed method, which will be called when the timer generates an action event. For example: ```java public class MyClass implements ActionListener { ... public void actionPerformed(ActionEvent e) { // Code to be executed when the timer generates an action event } ... } ```

Create a Timer object

Create a Timer object with a specified delay (in milliseconds) and an ActionListener (you can use 'this' if ActionListener is implemented in the current class). This delay will be the interval between the consecutive action events generated by the timer. For example, to create a timer with a 1000-millisecond (1-second) delay: ```java Timer myTimer = new Timer(1000, this); ```

Start the timer

To begin generating action events, start the Timer object using the `start()` method: ```java myTimer.start(); ``` Once the timer is started, it will generate action events at the specified interval, and the `actionPerformed` method will be called each time an action event is generated.

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91影视

How do you cause a Timer object to begin generating action events?

Short Answer

Step by step solution

Import necessary classes and interfaces

Implement ActionListener interface

Create a Timer object

Start the timer

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