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17 Cards in this Set
- Front
- Back
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What is a class? |
A Java file that describes a general category in terms of data and behavior. |
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What is an object? |
One specific instance of a class. |
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What is a data type? |
A peice of information with a specific size and value. |
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List and explain the two categories of data types. |
Primitive: The most basic building blocks of information. They include, among others, int, char, double, boolean.
Referenece/Object: More complex collections of information, generally created from a collection of primitive data types. |
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What is object state? |
The set of all values for an object's fields. Two objects of the same class can have different states. |
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What is a method? |
A collection of statements grouped together to perform a specific task. It is a behavior that can be called upon by name from other parts of the program. |
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What is a comment? |
Specific code that is ignored by the compiler. Comments act as notes for programmers to make code easier to understand. |
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Show examples of comments |
// single line comment
/* single line comment */
/* * Multi * Line * Comment */ |
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What is a JavaDoc comment? |
Comments that are used for documentation purposes. Special keywords can be used such a as @author @param. These comments will automatically be generated to HTML for API documentation. |
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Show an example of JavaDoc documentation. |
/** * An example of documentation. * @author Your Name * @version version (eg: 1.0) */ |
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What are VISIBILITY MODIFIERS? |
These grant or limit access (scope) to methods and variables within a class. |
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Name and describe two visibility modifiers. |
Private: Access to variable or method declared private is restricted to the class they reside. Public: All code has access to variable or method declared public regardless of where that code resides. |
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What is a method parameter? |
Input a method can accept to perform an action. |
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What is method return? |
Output as defined in the method signature. |
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What is a return type and what are some examples? |
A return type is the type of data that will make up a method's final output. Examples: int, String, double. In addition to primitive data types, methods can return reference / object data. |
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What is the return type of a method that doesn't have to give any sort of output? |
Void |
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What is a method signature and what are its elements? |
A combination of elements in a specific order to declare a method.
Elements: modifier return-type name(parameters) Example: public int getSum(int a, int b) |
