In the file of bytecodes, HelloObject.class
.
Here is how the program runs.
It is actually the bytecodes that are executed.
However
it is
convenient to
discuss how the program works in terms of
the statements that were compiled into bytecode,
starting at main()
.
class HelloObject // 2a. The class definition is { // used to make the object public void speak() // 2b. Aspeak()
method { // is included in the object. System.out.println("Hello from an object!"); // 3a. Thespeak()
method // of the object prints a // message on the screen. // 3b. The method returns to the // caller. } } public class HelloTester { public static void main ( String[] args ) // 1. Main starts running. { HelloObject anObject = new HelloObject(); // 2. AHelloObject
// is created using its // default constructor. anObject.speak(); // 3. The object'sspeak()
// method is called. } // 4. The entire program is finished. }
Could you activate the speak()
method without creating an object?