Many programming languages allow passing objects by reference or by value. In Java, we can only pass object parameters by value. This imposes limits and also raises questions.

Obviously that doesn't compile, but I hate to make a file FooType.java with just the 5 lines above in it. Obviously that doesn't compile, but I hate to make a file FooType.java with just the 5 ...

Classes are the most common way to define object types, and most languages that use objects—including Java, Python, and C++—support classes with a similar syntax.

Here, without an object, there is no instance data and while the instance methods exist as part of the class definition, there should always be an object instance to provide data to them. So to sum up ...

Abstract classes are classes that contain one or more abstracted behaviors or methods. Objects or classes can be abstracted, which means that they're summarized into characteristics relevant to the ...

String s1 = new String("Hello world!"); That code will create an s1 string object and a reference variable. As noted, Java strings are immutable. Once created, a string using string class cannot be ...