Java control structures - Objects First with Java: A Practical Introduction Using BlueJ - page 511

Examples:

if (field.size() == 0) {
System.out.println( "The field is empty." );
}

if (number < 0) {
reportError();
}
else {
processNumber(number);
}

It is very common to link if-else statements together by placing a second if-else in the else part of the
first. This can be continued any number of times. It is a good idea to always include a final else part.

if (n < 0) {
handleNegative();
}
else if (number == 0) {
handleZero();
}
else {
handlePositive();
}

D.2.2 switch
The switch statement switches on a single value to one of an arbitrary number of cases. Two
possible patterns of use are:

switch ( expression ) { switch ( expression ) {
case value : statements ; case value1 :
break ; case value2 :
case value : statements ; case value3 :
break ; statements ;
further cases possible break ;
default : statements ; case value4 :

break ; case value5 :

}

statements ;
break ;
further cases possible
default :
statements ;
break ;

}

Notes:
■ A switch statement can have any number of case labels.
■ The break statement after every case is needed, otherwise the execution “falls through” into
the next label's statements. The second form above makes use of this. In this case, all three