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# Untitled

a guest Dec 10th, 2019 97 Never
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1. public class HelloWorld{
2.
3.      public static void main(String []args){
4.         System.out.println("Hello World, Arrays");
5.
6.         //Object[] definition = (2 ways to define an array)
7.
8.         //Implicit = {def, def, def, def}
9.         int[] a = {5, 4, 12, 10};
10.
11.         //Explicit = new int[elements/length]
12.         int[] b = new int[10];
13.
14.         /*
15.         The array A has 4 elements, but a index ranging from 0-3
16.         if we said a[3] = 5; Then the 10 would be replaced with a 5.
17.
18.         the array b has no elements defined, but has space for 10.
19.         Meaning the index is avaliable from 0-9. We can define a
20.         point on the array by b[5] = 6;
21.
22.         To redefine a element in an array.
23.         Array[Index] = Definition;
24.
25.         Array capacity is limited. A can never be modified to hold more than
26.         4 elements and b can never be modified to hold more than 10 elements.
27.
28.         */
29.                 b[9] = 5; //defines the 10th element but the 9th index to 5;
30.                 a[2] = 1; //defines the 3nd element but the 2th index to
31.                 //Causes exception b[10] = 5; There is no 11th element or the
32.                 //10th index
33.
34.
35.         //looping through an ArrayList
36.         for (int i = 0; i < a.length; i++) { //i ~ Index
37.             System.out.println(a[i]);
38.         }
39.         //Another way to loop. Limit no built in counter (i)
40.         for(int i : a) {
41.             System.out.println(i);
42.         }
43.
44.         loopThroughArray(a); //Passes the Array A as an argument to the
45.         //function loopThroughArray to the parameters
46.
47.              }
48.
49.
50.         public static void loopThroughArray(int[] array) {
51.             for(int i : array) {
52.                 System.out.println("Looping: " + i);
53.             }
54.         }
55. }
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