Character Escape Sequence

String Literals

String literals in Java are specified such as they are in most other languages through enclosing a sequence of characters among a pair of double quotes. Instance of string literals are

"Hello world"

"two\nlines"

"\ "this is in quotes\""

The escape sequences and octal/hexadecimal notations which were defined for character literals work the similar way inside of string literals. An important thing to remember about Java strings are in which they must starts and end on the similar line. There is no line continuation escape sequence as there is within other languages.

Variables

The variable is the primary unit of storage in Java program. Variable is defined through the combination of an identifier, a type and an optional initializer. Within further, all variables have a scope, that describes their visibility and lifetime. These components are examined next.

Declaring a Variable

Within Java language, all variables have to be declared before they can be used. The prime form of a variable declaration is displays here:

Type identifier [=value] [identifier [=value] ....];

The type is one of Java's atomic types, or name of a class or interface.  An identifier is the name of the variable. You could initialize the variable through specifying an equal sign and a value keep in mind in which the initialization expression must result in a value of the same (or compatible) type as which specified for the variable. For declare more than one variable of the specified type use a comma - separated list.

Here are various examples of variable declarations of several types. Remember that a few involves an initialization.

int a, b, c;       // Defines three ints, a, b, and c.

int d =3, e, f = 5         // defines three more ints, initializing d and f 

byte z =22;     // initializes z.

double pi = 3.14159; // declare an approximation of pi '

char x ='x';     // the variable x has the value 'x'.

The identifiers which you select have nothing intrinsic in their names that indicate their type. Many readers will remember when FORTRAN predefined all identifiers from I to N to be of type INTEGER although all other identifiers were REAL. Java permits any properly formed identifier to have any declared type.