Primitive Types, Strings, and Console I/O

Flashcards based on key concepts from the Unit on Primitive Types, Strings, and Console I/O in Object-Oriented Programming.

Math Class

A set of integrated mathematical operators in Java that includes methods for performing numeric procedures like exponential, logarithm, square root, and trigonometric functions.

abs(num)

Returns the absolute value of a numerical value.

random()

Returns a double value that is greater than or equal to 0.0 and less than 1.0.

DecimalFormat

A class in Java used to format decimal numbers into a specified pattern.

String Class

A class in Java used to create and manipulate strings, which are sequences of characters.

length()

A method that returns the size of the String object.

equals(Other_String)

A method that returns true if the calling String object and Other_String are equal; otherwise returns false.

toLowerCase()

A method that returns a string with all characters converted to lowercase.

toUpperCase()

A method that returns a string with all characters converted to uppercase.

indexOf(A_String)

A method that returns the position of the first occurrence of A_String in the calling String.

startsWith(String prefix)

A method that returns true if the String starts with the given prefix.