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20/02/2012 Things you can do w/ null. • store null in a variable or an array element. String s = null; words[2] = null;. • print a null reference.
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Arrays can store references to objects in addition to primitive values. • E.g.. GiftCard[] cards = new GiftCard[4];. • Creating an array does not
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Creating Arrays. • An array is an object so it needs an object reference. // Declare a reference to an array that will hold integers. int[] numbers;.
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05/07/2002 packages you can create instances of Java classes and obtain references to those instances. Once you have a reference to an object returned ...
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Building Java Programs
Arrays and objects use reference semantics. Why? — efficiency. Objects can store references to other objects as fields. ... public class Student {.
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COSC 123 - Java Lists and Arrays
An array can store both base types or object references. A collection is an object that stores other objects and provides methods for adding removing
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Declare a reference to an array that will hold integers. Arrays are objects and provide a public field named length that is a constant that can be ...
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