Datatype | Topcoder Archive

Problem Statement

When reading data as a string of characters, it is often useful to convert the data into a different datatype, which is easier to work with than a string of characters. For example, many operations are made much easier if the string of characters "123" is converted from a string of characters into a different datatype, such as an int or a float. We want to determine the best datatype to use for some data, given a string of characters. For the purposes of this problem, we will consider converting a string of characters into one of 4 datatypes:

"INTEGER" - if the string consists only of the digits '0' - '9'.
"BOOLEAN" - if the string is "true" or "false" (ignoring case)
"DECIMAL" - if the string contains only digits '0' - '9', and exactly one decimal point ('.'). "123.12", ".123", and "124." are all of type "DECIMAL". Note that by this definition the string "." is classified as a "DECIMAL"
"STRING" - if the string is none of the other datatypes.

Your task is to write a class Datatype with a method getType that takes a String, var, and classifies it into one of the above four types, and returns the datatype as a String.

Definition

Class:: Datatype
Method:: getType
Parameters:: String
Returns:: String
Method signature:: String getType(String var)
(be sure your method is public)

Constraints

var will contain between 1 and 50 characters, inclusive.
Each character in var will be a letter ('a'-'z' or 'A'-'Z'), a digit ('0'-'9'), a decimal point ('.'), a space (' '), or one of the following characters: ,/<>?;':"[]{}\|`~!@#$%^*()_+-=&

Examples

```
"123"
```
```
Returns: "INTEGER"
```
```
"324.1"
```
```
Returns: "DECIMAL"
```
```
".12"
```
```
Returns: "DECIMAL"
```
```
"453."
```
```
Returns: "DECIMAL"
```
```
"770.555.1212"
```
```
Returns: "STRING"
```
```
"TrUe"
```
```
Returns: "BOOLEAN"
```

"this is just a string"

Returns: "STRING"

"453 ducks flew 4739.45 miles."

Returns: "STRING"

```
"."
```
```
Returns: "DECIMAL"
```

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