Interface VoidToBooleanFunction

Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface VoidToBooleanFunction
A function that accepts no parameters and returns a boolean.
Since:
1.2

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    apply()
    Applies the function.
    default VoidToBooleanFunction
    negate()
    Returns a VoidToBooleanFunction that represents !this.apply(e).
    static VoidToBooleanFunction
    not(VoidToBooleanFunction func)
    Returns a VoidToBooleanFunction that represents !func.apply(e).

  • Method Details

    • apply

      boolean apply()
      Applies the function.
      Returns:
      The result.

    • negate

      default VoidToBooleanFunction negate()
      Returns a VoidToBooleanFunction that represents !this.apply(e).
      Returns:
      The logical negation of this function.

    • not

      static VoidToBooleanFunction not(VoidToBooleanFunction func)
      Returns a VoidToBooleanFunction that represents !func.apply(e).
      Parameters:
      func - The function to negate. Must not be null.
      Returns:
      The logical negation of the specified function.
      Throws:
      NullPointerException - If the specified function is null.