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51 Cards in this Set
- Front
- Back
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machine language
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binary ones and zeroes
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low-level assembly languages
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characterized by mnemonic codes
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high-level languages
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english-like
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very-high level languages
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results instead of procedural oriented
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natural languages
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conversational
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Object-Oriented
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data and operations are packaged in a single unit called an object
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designer
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James Gosling, Sun Microsystems, 1990s
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Parsimonious
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compatible with older versions
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Robust
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strongly typed, incorruptible data
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secure
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protection against misuse of code
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portable
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platform-independent
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java compiler
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converts code into bytecode
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the Java Virtual Machine
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contains an interpreter to execute the bytecode
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the Java API
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the standard set of packages available in Java
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the Java Applet Viewer
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mini browser which displays java applets
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JIT compiler
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takes bytecode and converts it into machine code
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console applications
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stand-alone programs using a command-line interface (Command Prompt)
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windowed applications
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stand-alone programs using a graphical user interface (GUI)
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applets
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client-side programs executed as part of a displayed web page
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servlets
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server-side programs hosted and run on a web server
used in conjunction with Java Server Pages (JSP) to provide sophisticated server-side logic enable connections to server databases through Java Database Connectivity (JDBC) |
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web services
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recieve information requests over the web and return the requested data
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JavaBeans
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reusable software components
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algorithm
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step by step procedure for solving a problem in a finite amount of time
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Coding
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testing your algorithm into a programming language
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object oriented programming looks at...
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what the object is
the object's data members the object's behavior it describes a general type of object and then creates many of the objects of that same type |
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Jlabel
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displays text that the user cannot change or an image that the user cannot change. Represents a java class
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title property
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contains the text that is shown in the Jframe's title bar. Use book-title capitalization
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title bar
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top portion of the window that contains the window's title
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book-title capitalization
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the first letter of each significant word in the text is capitalized, and the title does not end with any punctuation
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statement
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performs an action, ends in a semicolon
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String or String literal
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enclosed in double quotes. Is a class in Java.
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Case sensitive
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upper case and lower case letters are treated differently
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pixels
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picture elements. A tiny point on your screen that displays a color.
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size property
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specifies the Jframe's width and height
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RGB values
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screen color created by combining red, greed, and blue values
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content pane
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container object which every Jframe has. Purpose is to provide a visual area in which to place GUI components like Jlabels.
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background property
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controls the color that will appear in the background of the window
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text property
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property which displays text (within the Jframe on the Jlabel)
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location property
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specifies the position of the upper-left corner of the component in the content pane. Upper left corner is 0,0. Set according to a component's distance from the corner. First number = moves right, second = moves down
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font property
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allows you to set the font name, font style, and font size in points
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1 point =
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1/72 inch
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horizontalAlignment property
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used to align text within a JLabel; right, center, or left
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icon property
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displays an image in the JLabel
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bounds property
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controls both the size and the location of the JLabel
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debugging
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process of fixing errors in an application
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two types of errors
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syntax and logic
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syntax errors
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compilation errors; compile-time errors; occur when code statements violate the grammatical rules of the programming language
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logic errors
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allow the program to compile, but cause it to produce erroneous results when it runs
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debugger
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software which allows you to analyze the behavior of your application to locate logic errors
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JFrames
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use short, descriptive titles; use title-book capitalization
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JLabels
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use to display text that users cannot change; ensure all components are large enough to display the text; add images to create graphics users cannot change; ensure that all components are large enough to display the images
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