Prentice.Hall.Introduction.to.Java.Programming,.Brief.Version.9th.(2014).[sharethefiles.com]

This statement checks to see whether the status matches the value 0, 1, 2, or 3, in that
order. If matched, the corresponding tax is computed; if not matched, a message is displayed.
Here is the full syntax for the switch statement:
3.14 switch Statements 109
switch (switch-expression) {
case value1: statement(s)1;
break;
case value2: statement(s)2;
break;
...
case valueN: statement(s)N;
break;
default: statement(s)-for-default;
}
switch statement
The switch statement observes the following rules:
■ The switch-expression must yield a value of char, byte, short, int, or
String type and must always be enclosed in parentheses. (Using String type in
the switch expression is new in JDK 7.)
■ The value1, . . ., and valueN must have the same data type as the value of the
switch-expression. Note that value1, . . ., and valueN are constant expressions,
meaning that they cannot contain variables, such as 1 + x.
■ When the value in a case statement matches the value of the switch-expression,
the statements starting from this case are executed until either a break statement or
the end of the switch statement is reached.
■ The default case, which is optional, can be used to perform actions when none of
the specified cases matches the switch-expression.
■ The keyword break is optional. The break statement immediately ends the
switch statement.
Caution
Do not forget to use a break statement when one is needed. Once a case is matched,
the statements starting from the matched case are executed until a break statement or
the end of the switch statement is reached. This is referred to as fall-through behavior.
For example, the following code displays the character a three times if ch is a:
without break
fall-through behavior
switch (ch) {
case 'a': System.out.println(ch);
case 'b': System.out.println(ch);
case 'c': System.out.println(ch);
}
ch is 'a'
false
ch is 'b'
false
true
true
System.out.println(ch)
System.out.println(ch)
ch is 'c'
false
true
System.out.println(ch)
Tip
To avoid programming errors and improve code maintainability, it is a good idea to put a
comment in a case clause if break is purposely omitted.