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What Double method can you use to detect whether a floating-point number has the special value Not a Number (NaN)?
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isNaN
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To invert the value of a boolean, which operator would you use?
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The logical complement operator "!".
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An ___ is a container object that holds a fixed number of values of a single type.
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An array is a container object that holds a fixed number of values of a single type.
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The term "instance variable" is another name for ___.
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The term "instance variable" is another name for non-static field.
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A variable declared within the opening and closing parenthesis of a method signature is called a ____.
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A variable declared within the opening and closing parenthesis of a method is called a PARAMETER.
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What are the eight primitive data types supported by the Java programming language?
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What are the eight primitive data types supported by the Java programming language? byte, short, int, long, float, double, boolean, char
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The following code snippet is an example of a ___ expression. 1 * 2 * 3
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a compound expression.
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The term API stands for _____________?
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The term API stands for Application Programming Interface.
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Statements may be grouped into ___.
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Statements may be grouped into BLOCKS.
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What Integer method can you use to convert an int into a string that expresses the number in hexadecimal? For example, what method converts the integer 65 into the string "41"?
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toHexString
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Real-world objects contain______ and ____.
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State and behavior
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What methods would a class that implements the java.lang.CharSequence interface have to implement?
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charAt, length, subSequence, and toString.
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Statements are roughly equivalent to sentences in natural languages, but instead of ending with a period, a statement ends with a ___.
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a semicolon.
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A block is a group of zero or more statements between balanced ___ and can be used anywhere a single statement is allowed.
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A block is a group of zero or more statements between balanced braces and can be used anywhere a single statement is allowed.
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A blueprint for a software object is called a ________.
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A blueprint for a software object is called a CLASS.
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Expressions are the core components of ___.
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Expressions are the core of STATEMENTS.
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A local variable stores temporary state; it is declared inside a ___.
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A local variable stores temporary state; it is declared inside a METHOD.
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What is the value of the following expression, and why? Integer.valueOf(1).equals(Long.valueOf(1))
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False. The two objects (the Integer and the Long) have different types
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A namespace that organizes classes and interfaces by functionality is called a ______.
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A namespace that organizes classes and interfaces by functionality is called a PACKAGE.
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What Integer method would you use to convert a string expressed in base 5 into the equivalent int? For example, how would you convert the string "230" into the integer value 65?
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valueOf. Here's how: String base5String = "230"; int result = Integer.valueOf(base5String, 5);
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A software object's behavior is exposed through ______.
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A software object's behavior is exposed through METHODS.
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Operators may be used in building ___, which compute values.
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Operators may be used in building EXPRESSIONS, which compute values.
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Hiding internal data from the outside world, and accessing it only through publicly exposed methods is known as data ______.
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Hiding internal data from the outside world, and accessing it only through publicly exposed methods is known as data ENCAPSULATION.
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The term "class variable" is another name for ___.
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The term "class variable" is another name for STATIC FIELD.
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Common behavior can be defined in a ______ and inherited into a _____ using the _____ keyword.
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Common behavior can be defined in a SUPERCLASS and inherited into a SUBCLASS using the EXTENDS keyword.
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A collection of methods with no implementation is called an _____.
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A collection of methods with no implementation is called an INTERFACE.
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Which operator is used to compare two values, = or == ?
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The == operator is used for comparison, and = is used for assignment.
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A software object's state is stored in ___.
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A software object's state is stored in FIELDS.
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Character strings are represented by the class ___.
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Character strings are represented by the class java.lang.String.
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