Task 8 Part 1 Array Intro; declaration, initialization, simple array program by BeeHab
Task 8 - Part 1 : Array introduction
Today’s goals: Array example class
1- Definition of an array:
An array is a container object that holds a fixed number of values of a single type. The length of an array is established when the array is created. After creation, its length is fixed. Arrays are index based.
2- Declaration of an array ⇒ Declare an array of integers
int [ ] anArray;
3- INITIALIZE THE ARRAY: Allocate memory of 10 integers.
anArray = new int[10];
Or you can just write steps 2 & 3in one line: int [ ] anArray = new int[10];
4- Create a program: ArrayExample with an array of integers.
Element at index 0: 10
Element at index 1: 20
Element at index 2: 30
Element at index 3: 40
Element at index 4: 50
Element at index 5: 60
Element at index 6: 70
Element at index 7: 80
Element at index 8: 90
Element at index 9: 100
5- Validate the output.
NEXT UP; let's see if you can figure out the following steps below:
Shortcut syntax of the Array Initialization
1- int[ ] row, col, rowsCols[ ] ⇒ Break this down?
2- Clone method ?
3- Add an extra element in an array?
4- Shortcut Syntax of the array
5- Unchecked Exception???
Stay Tuned to BeeHab, It's in my DNA presents Java Learning Series 1
=====================SOURCE CODE=====================
import java.util.Arrays;
public class Task8_Array_Intro
{
static final int SIZE = 10;
public static void main(String[] args)
{
// Declaration
int [] anArray; int [] anArray2;
// Initialize the array and Assign 10 integers
anArray = new int[SIZE];
// write simple program that stores 10 integers
// 0 1 2 3 4 5 6 7 8 9 // each index number show where elements added.
anArray[0] = 10; anArray[1] = 20; anArray[2] = 30;
anArray[3] = 40; anArray[4] = 50; anArray[5] = 60;
anArray[6] = 70; anArray[7] = 80; anArray[8] = 90;
anArray[9] = 100;
String index0 = "Index 0= "+ anArray[0] + " " +
"Index 3= " + anArray[3] + " " +
"Index 6= " + anArray[6];
System.out.println(index0);
System.out.println("Index 1= "+ anArray[1] + " " +
"Index 4= "+ anArray[4] + " " +
"Index 7= "+ anArray[7]);
System.out.println("Index 2= "+ anArray[2] + " " +
"Index 5= "+ anArray[5] + " " +
"Index 8= "+ anArray[8]);
System.out.println(" "+" Index 9= "+ anArray[9]);
}
}
=====================SOURCE CODE=====================
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