Arrays

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Declaration: []; Alternative declaration: [] ; <strong>Arrays</strong> (cont.) • can be a primitive datatype or a reference type (for example, a class). • Declaration alone creates a reference for the array. int[] a; creates a reference to an array of int: a ref int[] 6-4/20
Creation: • the array itself is created using the new operator. • can combine the declaration with the creation: [] = new []; double[] d = new double[5]; // creates an array object with 5 // elements of type double. • can create an array and assign its reference value to a reference that is already declared: int[] a; a = new int[8]; // creates av array object with 8 // elements of type int • Elements are always initialized to the default value for elementType when the array is created. • Each array has a field, length, that indicates the number of elements in the array. – Value of a.length is equal to the number of elements array a can hold, i.e 8. 6-5/20
Page 1 and 2: Lecture slides for: Chapter 6 Array
Page 3: Arrays • Arrays can be used to cr
Page 7 and 8: Example of an array // Declaration
Page 9 and 10: Multi-dimensional arrays: arrays of
Page 11 and 12: Programming pattern - some simple a
Page 13 and 14: More on initializing of arrays // i
Page 15 and 16: import java.util.Scanner; public cl
Page 17 and 18: for for(:) for Syntax: loop variabl
Page 19 and 20: and computes the frequency of each

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