Instantiate a java.lang.Float object with the value specified.
NOTE: this method is useful when one has to invoke a Java/Scala method
requiring a float (instead of double) type for at least one of its
parameters.
Examples
# \donttest{
sc <- spark_connect(master = "spark://HOST:PORT")
jflt <- jfloat(sc, 1.23e-8)
# jflt is now a reference to a java.lang.Float object
# }