Contents - Cultural View

Java syntax 177
Double quote \"
Tab \t
Backspace \b
Integer literals are of int type by default unless long type is specified by appending L or l suffix to the literal, e.g.
367L.
Variables
Variables are identifiers associated with values. They are declared by writing the variable's type and name, and are
optionally initialized in the same statement by assigning a value.
int myInt; /* Declaring an uninitialized variable called 'myInt',
of type 'int' */
myInt = 35; // Initializing the variable
int myInt = 35; // Declaring and initializing the variable at the same time
Multiple variables of the same type can be declared and initialized in one statement using comma as a delimiter.
int a, b; // Declaring multiple variable of the same type
int a = 2, b = 3; // Declaring and initializing multiple variables of the same type
Code blocks
The operators { ... } are used to signify a code block and a new scope. Class members and the body of a method are
examples of what can live inside these braces in various contexts.
Inside of method bodies you can use the braces to create new scopes like so:
void doSomething() {
}
int a;
{
}
a = 2;
int b;
a = 1;
b = 3; // Will fail because the variable is declared in an inner scope.
Comments
Java has three kinds of comments: traditional comments, end-of-line comments and documentation comments.
Traditional comments start with /* and end with */, they may span across multiple lines. This type of comments was
derived from C and C++.
/* This is a multi-line comment.
It may occupy more than one line. */
End-of-line comments start with // and extend to the end of the current line. This comment type is also present in
C++ and in modern C.