Sams Teach Yourself Java™ in 24 Hours (Covering Java 7 and Android)
ptg7068951 152 HOUR 11:Describing What Your Object Is Like Q&A Q. Do you have to create an object to use class variables or ...
ptg7068951 Workshop 153 Workshop The following questions see if you have the attributes and behavior to under- stand OOP techniq ...
ptg7068951 154 HOUR 11:Describing What Your Object Is Like Activities If all thistalk of viruses didn’t make you sick,you can in ...
ptg7068951 WHAT YOU’LL LEARN IN THIS HOUR: .Designing superclasses and subclasses .Forming an inheritance hierarchy .Overriding ...
ptg7068951 HOUR 12:Making the Most of Existing Objects At the top is the Objectclass.JApplethas five superclasses above it in th ...
ptg7068951 Establishing Inheritance 157 . The setBackground()method sets the background color of the applet window. . The add()m ...
ptg7068951 158 HOUR 12:Making the Most of Existing Objects paint()method, implemented by the Componentclass, is passed all the w ...
ptg7068951 Working with Existing Objects 159 . To refer to a variable of the superclass, as in super.hawaii = 50 . To refer to a ...
ptg7068951 160 HOUR 12:Making the Most of Existing Objects When Java was first introduced, the system of sharing objects was lar ...
ptg7068951 Storing Objects of the Same Class in Vectors 161 The name of the class held by the vector is placed within charac- te ...
ptg7068951 HOUR 12:Making the Most of Existing Objects Yo u c a n re m o v e a n o b j e c t f ro m a v e c t o r u s i n g i t ...
ptg7068951 Storing Objects of the Same Class in Vectors 13: list.add(moreNames[i]); 14: } 15: Collections.sort(list); 16: for (S ...
ptg7068951 164 HOUR 12:Making the Most of Existing Objects Creating a Subclass To see anexample of inheritance at work, in the n ...
ptg7068951 Creating a Subclass 165 The Point3Dclass does not have a main()block statement, so you cannot run it with a Java inte ...
ptg7068951 166 HOUR 12:Making the Most of Existing Objects 20: System.out.println(“The 3D point is located at (“+ object2.x 21: ...
ptg7068951 Workshop 167 Q&A Q. Most Java programs we’ve created up to this point have not used extendsto inherit from a supe ...
ptg7068951 168 HOUR 12:Making the Most of Existing Objects What methods can you use to retrieve an element stored in a vector? ...
ptg7068951 WHAT YOU’LL LEARN IN THIS HOUR: .Creating user interface components such as buttons .Creating labels,text fields, and ...
ptg7068951 170 HOUR 13:Building a Simple User Interface Swing includes everything you need to write programs that use a GUI. Wit ...
ptg7068951 Using Components 171 One way to make use of a frame in a Java application is to make the appli- cation a subclass of ...
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