private void verifyReservedWords(){
		
		if( this.string.equals( "if" ) )
			this.type = TokenType.Element.IF;
		
		else if( this.string.equals( "then" ) )
			this.type = TokenType.Element.THEN;
			
		else if( this.string.equals( "else" ) )
			this.type = TokenType.Element.ELSE;
		
		else if( this.string.equals( "end" ) )
			this.type = TokenType.Element.END;
		
		else if( this.string.equals( "read" ) )
			this.type = TokenType.Element.READ;
		
		else if( this.string.equals( "write" ) )
			this.type = TokenType.Element.WRITE;
		
		else if( this.string.equals( "repeat" ) )
			this.type = TokenType.Element.REPEAT;
		
		else if( this.string.equals( "until" ) )
			this.type = TokenType.Element.UNTIL;
	}