Token

All Implemented Interfaces:: java.io.Serializable


public class Token
 implements Serializable

Describes the input token stream.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description

Field Summary

Fields
Modifier and Type	Field	Description
`public int`	`kind`
`public int`	`beginLine`
`public int`	`beginColumn`
`public int`	`endLine`
`public int`	`endColumn`
`public String`	`image`
`public Token`	`next`
`public Token`	`specialToken`

Constructor Summary

Constructors
Constructor	Description
`Token()`	No-argument constructor
`Token(int kind)`	Constructs a new token for the specified Image.
`Token(int kind, String image)`	Constructs a new token for the specified Image and Kind.

Enum Constant Summary

Enum Constants
Enum Constant	Description

Method Summary

Modifier and Type	Method	Description
`Object`	`getValue()`	An optional attribute value of the Token.
`String`	`toString()`	Returns the image.
`static Token`	`newToken(int ofKind, String image)`	Returns a new Token object, by default.
`static Token`	`newToken(int ofKind)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Token
```
Token()
```
    No-argument constructor
  - Token
```
Token(int kind)
```
    Constructs a new token for the specified Image.
  - Token
```
Token(int kind, String image)
```
    Constructs a new token for the specified Image and Kind.
- Method Detail
  - getValue
```
 Object getValue()
```
    An optional attribute value of the Token. Tokens which are not used as syntactic sugar will often contain meaningful values that will be used later on by the compiler or interpreter. This attribute value is often different from the image. Any subclass of Token that actually wants to return a non-null value can override this method as appropriate.
  - toString
```
 String toString()
```
    Returns the image.
  - newToken
```
 static Token newToken(int ofKind, String image)
```
    Returns a new Token object, by default. However, if you want, you can create and return subclass objects based on the value of ofKind. Simply add the cases to the switch for all those special cases. For example, if you have a subclass of Token called IDToken that you want to create if ofKind is ID, simply add something like : case MyParserConstants.ID : return new IDToken(ofKind, image); to the following switch statement. Then you can cast matchedToken variable to the appropriate type and use sit in your lexical actions.
  - newToken
```
 static Token newToken(int ofKind)
```