Final answer:
To display 2 cars on a frame in a Java program, one could use a GUI library and override the paint method for custom graphics. The JFrame is used as the window, and a JComponent is customized for drawing the cars. Without the contents of Chapter 3 Section 3, the exact code cannot be provided.
Step-by-step explanation:
To create a Java program that displays 2 cars on a frame, one would typically use a graphical user interface (GUI) library like Swing or JavaFX. In this context, we are assuming the use of Swing and the chapter content might give us tips on the drawing logic on a frame. Unfortunately, without the actual contents of Chapter 3 Section 3, we cannot provide the exact implementation details. However, I can give you an outline of how the program could be structured.
Step 1: Set up your development environment and create a new Java class with a main method.
Step 2: In your Java class, create a JFrame object, which represents the window that will hold the car images.
Step 3: Override the paint method of a JComponent (such as JPanel) to create custom drawing logic for the two cars. This could be a simple drawing of shapes to represent cars or using images if available.
Step 4: Add your custom JComponent to the JFrame and set the necessary frame configurations like size, default close operation, and visibility.
Step 5: Compile and run your Java program to see the two cars displayed within the frame.