Understanding type compatibility is fundamental to writing good Java programs, but the interplay of variances between Java language elements can seem highly academic to the uninitiated. This ...

Learn the four types of polymorphism in Java, then start using subtype polymorphism ... associated with the variable’s type and not its value. This technique is known as early binding.

You use the Java array’s length property to print out its size: When you initialize Java arrays with the new keyword, the size argument is of type int. The 32-bit Java int can go to a maximum of 2,147 ...

follow these four steps Declare a variable of type array. Initialize the Java array to a non-null value. Use the length property of the array to get its size. Hold the value of the Java array length ...