(In this instance‚ we have only one producer and one consumer. Since it was my decision to code it this way‚ a mutex object would remedy the problem of a race condition with multiple producers and consumers. I chose to use semaphores instead‚ and my results are still correct). Race conditions arise from multiple‚ asynchronously executing threads that try to access a single object at the same time – producing the wrong result. Comments are available in the code that will provide a full understanding
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//QUESTION SET 1‚ Problem 1 //Part a (note‚ only certain parts will be needed for submit‚ don’t just copypasta like crazy public boolean equals( Object b ) { if ( ! (b instanceof Employee) ) return false; return getID().equals(((Employee)b).getID()); } //Part b public int compareTo( Employee b ) { int t = lastName().compareTo(b.lastName()); if(t==0) { t = firstName().compareTo(b.firstName()); if(t==0) t=getID().compareTo(b.getID()); }
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The Object Class The Object class is the superclass of all other classes. Classes‚ such as Circle and String‚ are subclasses of Object: superclaes Circle 5tring Subclasses inherit‚ or receive‚ the methods of its superclass. The Object class includes methods for comparing objects and representing an object as a string: Class Object (java.lang.Object) Method equals (Object obj) returns true if obj is equal to the object. toString
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Encapsulation‚ Polymorphism) 7.9 The Object Reference this 7.10 The toString and equals Methods (you need to know equalsIgnoreCase ….) 7.11 Static class members Chapter 8 8.1 Declaring and Instantiating Arrays 8.2 Accessing Array Elements 8.3 Aggregate Array Operations (not anything from 8.3.4) 8.5 Using Array in classes Includes all what I have taught you that is not in the book on single dimensional arrays. (Array of objects) Chapter 9 9.1 Declaring and Instantiating
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drawing is a view of an object that shows the 3 views of an object‚ they may be; side view‚ front view and top view. The picture to the left is an example of an isometric drawing‚ is a cube and has a top view‚ a right front view and a left front view. What is an Orthographic drawing? An orthographic drawing show all the sides to an object as an individual‚ whereas the isometric shows the sides still connected to the shape the orthographic drawing shows it off the object so you can see the full
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the Collections API? | A: | The Collections API is a set of classes and interfaces that support operations on collections of objects. | Q: | What is the List interface? | A: | The List interface provides support for ordered collections of objects. | Q: | What is the Vector class? | A: | The Vector class provides the capability to implement a growable array of objects. | Q: | What is an Iterator interface? | A: | The Iterator interface is used to step through the elements of a Collection
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an entity-relationship (ER) diagram‚ a graphical representation of entities and their relationships to each other‚ typically used in computing in regard to the organization of data within databases or information systems. An entity is a piece of data-an object or concept about which data is stored. A relationship is how the data is shared between entities. There are three types of relationships between entities: 1. One-to-One One instance of an entity (A) is associated with one other instance of another
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values of the specified type can be put into a place COMP 102 26/27:9 Object types • All object values have two types: • the type they were created as • the Object type COMP 102 26/27:10 Variables‚ fields‚ array elements are all defined with a type What types are there • primitive types: int‚ double‚ boolean‚ long‚ float‚ char‚ .. note: java will "coerce" some types into other types: double number = 4; • Object types: Every class • Arrays : int[ ]‚ double[ ][ ]‚ Balloon[ ]‚ defines a
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Oracle Data Pump is a new and unique feature of Oracle Database 11g. A new public interface package‚ DBMS_DATAPUMP‚ provides a server-side infrastructure for fast data and metadata movement between Oracle databases. It is ideal for large databases and data warehousing environments‚ where high-performance data movement offers significant time savings to database administrators. Data Pump automatically manages multiple‚ parallel streams of unload and load for maximum throughput. The degree of parallelism
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Fast Drawing and Bitmap Graphics This chapter presents fast drawing techniques‚ animation using bitmaps‚ and color palettes. First‚ fast drawing using the exclusive-or (R2_XORPEN) and the exclusive-nor (R2_NOTXORPEN) ROP2 codes is explored. Then‚ fast drawing using the “backing store” technique is discussed. Bitmaps are used in the backing store technique‚ and their use is introduced. After this‚ an example of creating animation using bitmaps is presented. Finally‚ the device independent bitmap
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