Tino APCS

Lesson A10

Next: The String Class

Strings

Lesson Overview: Strings are needed in many programming tasks. Much of the information that identifies a person must be stored as a string: name, address, city, social security number, etc. This lesson covers the specifications of the String class and how to use it to solve string-processing problems.

A
The String Class
B
String Constructors
C
Object References
D
The Null Value
E
String Query Methods
F
String Translation Methods
G
Immutability Of Strings
H
Comparing Strings
I
Strings And Characters
J
The Tostring Method
K
String I/o
Y
Summary
Z-1
Lab 10.1 Iterative Reverse And Palindrome
Z-2
Lab 10.2 Shorthand
Z-3
Lab 10.3 Piglatin
Z-4
Lab 10.4 Carrental
Z-5
Lab 10.5 Romannumerals
Z-6
Lab 10.6 Complexuserinput
Z-7
Lab 10.7 Stringcraft
Lesson Vocab
charAt

The String method that returns a char in the String at a specified index.

compareTo

A String method that compares a specified String to the current String.

CONCATENATION

Adding two Strings together using the + operator.

equals

A String method that compares the content of two Strings to see if they are equivalent.

GARBAGE

An object with no references to it.

GARBAGE COLLECTION

A Java process that removes inaccessible objects from memory.

IMMUTABLE

An object that cannot be changed.

length

A String method that returns the length in characters of the String.

nextLine

A Scanner method that returns a String ending when the Scanner object reaches a newline character.

next

A Scanner method that returns a String ending when the Scanner object reaches whitespace.

String Class

A class that holds a group of characters.

null

Defines that an identifier points to no value.

substring

A String method that returns a designated portion of a String.

STRING LITERAL

Hard-coded characters enclosed within double quotation marks, representing a String.

toString

A method that returns the String equivalent of any object.

toLowerCase

A String method that returns the String without any capital letters.

toUpperCase

A String method that returns the String without any lower case letters.

alias

When two reference variables reference the same object, they are called aliases.