Java, String, long, byte switch type can be used as an expression of it?

Java first introduce the switch statement:
switch statement:
Format
switch (expression) {
Case Value 1:
statement 1;
BREAK;
Case 2 values:
sentence 2;
BREAK;
...
...
default:
statement n + 1;
BREAK;
}

Implementation process:

1. switch expression to get a result, you first need to follow the case and compare the value 1, if the match, execute the statement 1, met break, end of statement
2. If the value does not match the back of the case 1, case 2 and then matched value, if successful, execute the statement 2, the end of the break
3. This in turn choose to judge, if not match, the default statement executes, the end!

the latter can now switch expression data types: int, Short, char, byte
JDK1.5 (included) after the expression can be enumerated types (enum) (Phase II ---> jdk new features) (reference types)
JDK1.7 (inclusive) after expression can be of type String
long as the expression can not switch the