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Similar to previous code

The code in Listing 24 is similar to code that you saw earlier. The differences are:

  • Cast is to type int[] instead of object[]
  • Values assigned are type int instead of references to Integer objects

Display the output

Finally, Listing 25 displays the int values stored in the elements of the leaf array objects.

Listing 25 . Display the output.
for(int i=0;i<v6.length;i++){ for(int j=0;j<((int[])v6[i]).length;j++){ System.out.print(((int[]

The code in Listing 25 is very similar to what you have seen before, and there should be no requirement for an explanation of this code.

The code in Listing 25 produces the following output:

4 6 8 10 12 14 16 6 9 12

I will leave it as an exercise for the student to correlate the output with the code.

Summary

When declaring a reference variable capable of referring to an array object, the array type is declared by writing the name of an element type followed bysome number of empty pairs of square brackets [].

The components in an array object may refer to other array objects. The number of bracket pairs used in the declaration of the reference variableindicates the depth of array nesting (in the sense that array elements can refer to other array objects).

An array's length is not part of its type or reference variable declaration.

Multi-dimensional arrays are not required to represent rectangles, cubes, etc. They can be ragged.

The normal rules of type conversion and assignment compatibility apply when creating and populating array objects.

Object is the superclass of all other classes. Therefore, an array of element type Object is capable of storing references to objects instantiated from any other class. The type declaration for such anarray object would be Object[] .

An array of element type Object is also capable of storing references to any other array object.

If the declared element type for the array object is one of the primitive types, the elements of the array can be used to store values of any primitivetype that is assignment compatible with the declared type (without the requirement for a cast).

If the declared element type is the name of a class, (which may or may not be abstract), a null reference or a reference to any object instantiated from the class or any subclass of the class may be stored in thearray element.

If the declared element type is an interface type, a null reference or a reference to any object instantiated from any class that implements theinterface can be stored in the array element.

A reference variable whose declared type is an array type does not contain an array. Rather, it contains either null, or a reference to anarray object. Declaring the reference variable does not create an array, nor does it allocate any space for the array components.

It is possible to declare a reference to an array object and initialize it with a reference to an array object when it is declared.

A reference to an array object can refer to different array objects (of the same element type and different lengths) at different points in the execution of a program.

Questions & Answers

the diagram of the digestive system
Assiatu Reply
allimentary cannel
Ogenrwot
How does twins formed
William Reply
They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
what is genetics
Josephine Reply
Genetics is the study of heredity
Misack
how does twins formed?
Misack
What is manual
Hassan Reply
discuss biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles
Joseph Reply
what is biology
Yousuf Reply
the study of living organisms and their interactions with one another and their environments
AI-Robot
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
Joseph Reply
what is the blood cells
Shaker Reply
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
Abdullahi Reply
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
Ramadan
What is classification
ISCONT Reply
is organisms that are similar into groups called tara
Yamosa
in what situation (s) would be the use of a scanning electron microscope be ideal and why?
Kenna Reply
A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
Hilary
cell is the building block of life.
Condoleezza Reply
what is cell divisoin?
Aron Reply
Diversity of living thing
ISCONT
what is cell division
Aron Reply
Cell division is the process by which a single cell divides into two or more daughter cells. It is a fundamental process in all living organisms and is essential for growth, development, and reproduction. Cell division can occur through either mitosis or meiosis.
AI-Robot
What is life?
Allison Reply
life is defined as any system capable of performing functions such as eating, metabolizing,excreting,breathing,moving,Growing,reproducing,and responding to external stimuli.
Mohamed
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Source:  OpenStax, Object-oriented programming (oop) with java. OpenStax CNX. Jun 29, 2016 Download for free at https://legacy.cnx.org/content/col11441/1.201
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