[Ch10] Fixed static imports example

package ch10;

import java.util.function.Predicate;

import java.util.stream.Stream;

import static java.lang.Math.sqrt;

import static java.lang.Math.tan;

import static java.lang.Math.*;

import static java.lang.System.out;

class WithStatic {

    out.println("sqrt " + sqrt(2.0));

    out.println("tan " + tan(60));

  }

  void otherStaticImports() {

    Stream.of("string")

          .filter(Predicate.not(String::isEmpty));

  }

}

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