Arrays - Revision history

Suhridk: /* Assignments */

2011-09-07T10:37:27Z

Assignments

2011-09-06T07:25:26Z

Initializing

2011-08-26T12:15:11Z

Assignments

2011-08-26T12:04:46Z

Initializing

2011-08-26T12:02:43Z

Initializing

2011-08-26T11:56:28Z

Initializing

2011-08-26T11:55:54Z

Initializing

2011-06-29T18:11:05Z

2011-06-29T17:11:19Z

2011-06-29T17:05:36Z

@@ Line 95: / Line 95: @@
 == Assignments ==
-* For primitive array types, once the array is declared it cannot point to a different array type. Cannot assign an int[] to a long[] !
+* For primitive array types, once the array is declared it cannot point to a different array type. '''Cannot assign an int[] to a long[] !'''
 * However, Object of any subclass of the declared array type can be put into the array.
 * It also works for the whole array itself. a subtype array can be assigned to a super-type array.

@@ Line 37: / Line 37: @@
 == Initializing ==
 * Initializing means assigning values to the elements of the array.
 * Initializing can be done after the array is declared and constructed.
-* Initializing can also be combined along with the array declaration and construction.
+* Initializing can be combined along with the array declaration and construction. If array's are initialized with constants, then this can be done '''ONLY''' at the time of array declaration.
 * '''IMP:''' Array elements are '''ALWAYS''' given their default values when the array is constructed. e.g. int will be 0, boolean false, Objects null etc. This holds true irrespective of where the array is declared.

@@ Line 94: / Line 94: @@
 == Assignments ==
-* For primitive array types, once the array is declared it cannot point to a different array type.
+* For primitive array types, once the array is declared it cannot point to a different array type. Cannot assign an int[] to a long[] !
 * However, Object of any subclass of the declared array type can be put into the array.
 * It also works for the whole array itself. a subtype array can be assigned to a super-type array.
 * Works for interfaces too.
-* Cannot assign arrays of different dimensions to each other.
+* Cannot assign arrays of different dimensions to each other !
 <syntaxhighlight lang="java5">

@@ Line 40: / Line 40: @@
 * Initializing can be done after the array is declared and constructed.
 * Initializing can also be combined along with the array declaration and construction.
-* '''IMP:''' Array elements are '''ALWAYS''' given their default values when the array is constructed. This holds true irrespective of where the array is declared.
+* '''IMP:''' Array elements are '''ALWAYS''' given their default values when the array is constructed. e.g. int will be 0, boolean false, Objects null etc. This holds true irrespective of where the array is declared.
 <syntaxhighlight lang="java5">

@@ Line 38: / Line 38: @@
 == Initializing ==
 * Initializing means assigning values to the elements of the array.
 * Initializing can be done after the array is declared and constructed.
 * Initializing can also be combined along with the array declaration and construction.
 <syntaxhighlight lang="java5">

← Older revision		Revision as of 17:11, 29 June 2011
Line 113:		Line 113:

	</syntaxhighlight>		</syntaxhighlight>
		+
		+	== Usage ==
		+
		+	* Accessing an array with out of bounds index values will only throw a run-time exception. NOT compile-time.

	== Multidimensional Arrays ==		== Multidimensional Arrays ==

← Older revision		Revision as of 17:05, 29 June 2011
Line 178:		Line 178:

	</syntaxhighlight>		</syntaxhighlight>
		+
		+
		+	* Arrays in a multi-dimensional array need not be of the same length.
		+	* For e.g.
		+
		+	<syntaxhighlight lang="java5">
		+
		+	int[][] matrix = new int[3][];
		+
		+	matrix[0] = {1,2,3,4};
		+	matrix[1] = {5,6};
		+
		+	</syntaxhighlight>
		+

	[[Category:OCPJP]]		[[Category:OCPJP]]