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% Document Info
\author{barbaeguama}
\pdfinfo{
  /Title (java-functional-interfaces.pdf)
  /Creator (Cheatography)
  /Author (barbaeguama)
  /Subject (Java Functional Interfaces Cheat Sheet)
}

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    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
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\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Java Functional Interfaces Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{barbaeguama} via \textcolor{DarkBackground}{\uline{cheatography.com/203153/cs/43228/}}}
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  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}barbaeguama \\
  \uline{cheatography.com/barbaeguama} \\
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 29th April, 2024.\\
   Page {\thepage} of \pageref{LastPage}.
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  Measure your website readability!\\
  www.readability-score.com
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\begin{tabularx}{17.67cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{17.67cm}}{\bf\textcolor{white}{Java Functional Interface}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{17.67cm}}{The functional interface is a simple interface with only one abstract method. A lambda expression can be used through a functional interface in Java 8. We can declare our own/custom functional interface by defining the Single Abstract Method (SAM) in an interface.% Row Count 6 (+ 6)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
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\begin{tabularx}{17.67cm}{x{4.6629 cm} x{12.6071 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{Types}}  \tn
% Row 0
\SetRowColor{LightBackground}
PREDICATE & takes one (or two) argument(s) and returns a boolean \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
UNARY OPERATOR & result and the single argument types are the same \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
BINARY OPERATOR & result and both argument types are the same \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
FUNCTION & result and one (or two) argument(s) types are different \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
SUPPLIER & takes no arguments, returns a value \tn 
% Row Count 10 (+ 2)
% Row 5
\SetRowColor{white}
CONSUMER & takes one (or two) arguments and returns no value \tn 
% Row Count 12 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
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\begin{tabularx}{17.67cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{17.67cm}}{\bf\textcolor{white}{Notes}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{17.67cm}}{If the interface accepts primitive arguments: prefixed Double, Int, Long,  e.g. DoubleConsumer} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{17.67cm}}{If the interface produces a primitive result: prefixed ToDouble, ToInt, ToLong, e.g. ToDoubleFunction} \tn 
% Row Count 5 (+ 3)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{17.67cm}}{If the interface both accepts and produces a primitive: prefixes combined e.g. IntToDoubleFunction} \tn 
% Row Count 7 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{17.67cm}}{BiConsumer variants that accept an object type and a primitive are prefixed Obj + the primitive, e.g. ObjDoubleConsumer} \tn 
% Row Count 10 (+ 3)
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\end{tabularx}
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\begin{tabularx}{17.67cm}{x{3.2053 cm} x{5.5671 cm} x{8.0976 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{17.67cm}}{\bf\textcolor{white}{Predicate}}  \tn
% Row 0
\SetRowColor{LightBackground}
Predicate\textless{}T\textgreater{} & boolean test(T t) & Represents a predicate (boolean-valued function) of one argument  (reference type) \tn 
% Row Count 5 (+ 5)
% Row 1
\SetRowColor{white}
BiPredicate\textless{}T,U\textgreater{} & boolean test(T t, U u) & Accepts two arguments  (reference types) \tn 
% Row Count 8 (+ 3)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{DoublePredicate} & e boolean test(double value) & Accepts one double-valued argument \tn 
% Row Count 11 (+ 3)
% Row 3
\SetRowColor{white}
\seqsplit{IntPredicate} & boolean test(int value) & Accepts one int-valued argument \tn 
% Row Count 13 (+ 2)
% Row 4
\SetRowColor{LightBackground}
\seqsplit{LongPredicate} & boolean test(long value) & Accepts one long-valued argument \tn 
% Row Count 15 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
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\begin{tabularx}{17.67cm}{x{3.2053 cm} x{4.8923 cm} x{8.7724 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{17.67cm}}{\bf\textcolor{white}{Supplier}}  \tn
% Row 0
\SetRowColor{LightBackground}
Supplier\textless{}T\textgreater{} & T get() & Represents a supplier of results (reference type) \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
\seqsplit{DoubleSupplier} & double \seqsplit{getAsDouble()} & A supplier of double-valued results \tn 
% Row Count 5 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{IntSupplier} & int getAsInt() & A supplier of int-valued results \tn 
% Row Count 7 (+ 2)
% Row 3
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\seqsplit{LongSupplier} & long \seqsplit{getAsLong()} & A supplier of long-valued results \tn 
% Row Count 9 (+ 2)
% Row 4
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\seqsplit{BooleanSupplier} & boolean \seqsplit{getAsBoolean()} & A supplier of boolean-valued results \tn 
% Row Count 12 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
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\begin{tabularx}{17.67cm}{x{3.7114 cm} x{5.5671 cm} x{7.5915 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{17.67cm}}{\bf\textcolor{white}{Consumer}}  \tn
% Row 0
\SetRowColor{LightBackground}
Consumer\textless{}T\textgreater{} & void accept(T t) & Represents an operation that accepts a single (reference type) input argument and returns no result \tn 
% Row Count 6 (+ 6)
% Row 1
\SetRowColor{white}
\seqsplit{DoubleConsumer} & void \seqsplit{accept(double} value) & Accepts a single double-valued argument and returns no result \tn 
% Row Count 10 (+ 4)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{IntConsumer} & void accept(int value) & Accepts a single int-valued argument and returns no result \tn 
% Row Count 14 (+ 4)
% Row 3
\SetRowColor{white}
\seqsplit{LongConsumer} & void accept(long value) & Accepts a single long-valued argument and returns no result \tn 
% Row Count 18 (+ 4)
% Row 4
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BiConsumer\textless{}T,U\textgreater{} & void accept(T t, U u) & Represents an operation that accepts two (reference type) input arguments and returns no result \tn 
% Row Count 24 (+ 6)
% Row 5
\SetRowColor{white}
ObjDoubleConsumer\textless{}T\textgreater{} & void accept(T t, double value) & Accepts an object-valued and a double-valued argument, and returns no result \tn 
% Row Count 29 (+ 5)
% Row 6
\SetRowColor{LightBackground}
ObjIntConsumer\textless{}T\textgreater{} & void accept(T t, int value) & Accepts an object-valued and an int-valued argument, and returns no result \tn 
% Row Count 34 (+ 5)
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\begin{tabularx}{17.67cm}{x{3.7114 cm} x{5.5671 cm} x{7.5915 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{17.67cm}}{\bf\textcolor{white}{Consumer (cont)}}  \tn
% Row 7
\SetRowColor{LightBackground}
ObjLongConsumer\textless{}T\textgreater{} & void accept(T t, long value) & Accepts an object-valued and a long-valued argument, and returns no result \tn 
% Row Count 5 (+ 5)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
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\begin{tabularx}{17.67cm}{x{3.374 cm} x{6.748 cm} x{6.748 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{17.67cm}}{\bf\textcolor{white}{{\bf{Binary Operator}}}}  \tn
% Row 0
\SetRowColor{LightBackground}
BinaryOperator\textless{}T\textgreater{} & T apply(T t, T u) & Represents an operation upon two operands of the same type, producing a result of the same type as the operands  (reference type) \tn 
% Row Count 9 (+ 9)
% Row 1
\SetRowColor{white}
\seqsplit{DoubleBinaryOperator} & double \seqsplit{applyAsDouble(double} left, double right) & Accepts two double-valued operands and produces a double-valued result \tn 
% Row Count 14 (+ 5)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{IntBinaryOperator} & int applyAsInt(int left, int right) & Accepts two int-valued operands and produces an int-valued result \tn 
% Row Count 19 (+ 5)
% Row 3
\SetRowColor{white}
\seqsplit{LongBinaryOperator} & long \seqsplit{applyAsLong(long} left, long right) & Accepts two long-valued operands and produces a long-valued result. \tn 
% Row Count 24 (+ 5)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
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\begin{tabularx}{17.67cm}{x{3.374 cm} x{6.4106 cm} x{7.0854 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{17.67cm}}{\bf\textcolor{white}{Unary Operator}}  \tn
% Row 0
\SetRowColor{LightBackground}
UnaryOperator\textless{}T\textgreater{} & T apply(T t) & Represents an operation on a single operand that produces a result of the same type as its operand  (reference type) \tn 
% Row Count 8 (+ 8)
% Row 1
\SetRowColor{white}
\seqsplit{DoubleUnaryOperator} & double \seqsplit{applyAsDouble(double} operand) & Accepts single double-valued operand and produces a double-valued result \tn 
% Row Count 13 (+ 5)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{IntUnaryOperator} & int applyAsInt(int operand) & Accepts a single int-valued operand and produces an int-valued result \tn 
% Row Count 18 (+ 5)
% Row 3
\SetRowColor{white}
\seqsplit{LongUnaryOperator} & long \seqsplit{applyAsLong(long} operand) & Accepts a single long-valued operand and produces a long-valued result \tn 
% Row Count 23 (+ 5)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
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\begin{tabularx}{17.67cm}{x{4.0488 cm} x{5.7358 cm} x{7.0854 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{17.67cm}}{\bf\textcolor{white}{Function}}  \tn
% Row 0
\SetRowColor{LightBackground}
Function\textless{}T,R\textgreater{} & R apply(T t) & Represents a function that accepts one argument and produces a result (reference type) \tn 
% Row Count 6 (+ 6)
% Row 1
\SetRowColor{white}
DoubleFunction\textless{}R\textgreater{} & R apply(double value) & Accepts a double-valued argument and produces a result \tn 
% Row Count 10 (+ 4)
% Row 2
\SetRowColor{LightBackground}
IntFunction\textless{}R\textgreater{} & R apply(int value) & Accepts an int-valued argument and produces a result \tn 
% Row Count 14 (+ 4)
% Row 3
\SetRowColor{white}
LongFunction\textless{}R\textgreater{} & R apply(long value) & Accepts a long-valued argument and produces a result \tn 
% Row Count 18 (+ 4)
% Row 4
\SetRowColor{LightBackground}
\seqsplit{DoubleToIntFunction} & int \seqsplit{applyAsInt(double} value) & Accepts a double-valued argument and produces an int-valued result \tn 
% Row Count 23 (+ 5)
% Row 5
\SetRowColor{white}
\seqsplit{DoubleToLongFunction} & long \seqsplit{applyAsLong(double} value) & Accepts a double-valued argument and produces a long-valued result \tn 
% Row Count 28 (+ 5)
% Row 6
\SetRowColor{LightBackground}
\seqsplit{IntToDoubleFunction} & double \seqsplit{applyAsDouble(int} value) & Accepts an int-valued argument and produces a double-valued result \tn 
% Row Count 33 (+ 5)
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{4.0488 cm} x{5.7358 cm} x{7.0854 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{17.67cm}}{\bf\textcolor{white}{Function (cont)}}  \tn
% Row 7
\SetRowColor{LightBackground}
\seqsplit{IntToLongFunction} & long \seqsplit{applyAsLong(int} value) & Accepts an int-valued argument and produces a long-valued result \tn 
% Row Count 4 (+ 4)
% Row 8
\SetRowColor{white}
\seqsplit{LongToIntFunction} & int \seqsplit{applyAsInt(long} value) & Accepts a long-valued argument and produces an int-valued result \tn 
% Row Count 8 (+ 4)
% Row 9
\SetRowColor{LightBackground}
\seqsplit{LongToDoubleFunction} & double \seqsplit{applyAsDouble(long} value) & Accepts a long-valued argument and produces a double-valued result. \tn 
% Row Count 13 (+ 5)
% Row 10
\SetRowColor{white}
ToDoubleFunction\textless{}T\textgreater{} & double \seqsplit{applyAsDouble(T} value) & Accepts a reference type and produces an int-valued result \tn 
% Row Count 17 (+ 4)
% Row 11
\SetRowColor{LightBackground}
ToIntFunction\textless{}T\textgreater{} & int applyAsInt(T value) & Accepts a reference type and produces an int-valued result \tn 
% Row Count 21 (+ 4)
% Row 12
\SetRowColor{white}
ToLongFunction\textless{}T\textgreater{} & long \seqsplit{applyAsLong(T} value) & Accepts a reference type and produces a long-valued result. \tn 
% Row Count 25 (+ 4)
% Row 13
\SetRowColor{LightBackground}
BiFunction\textless{}T,U,R\textgreater{} & R apply(T t, U u) & Represents a function that accepts two arguments and produces a result (reference type) \tn 
% Row Count 31 (+ 6)
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\begin{tabularx}{17.67cm}{x{4.0488 cm} x{5.7358 cm} x{7.0854 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{17.67cm}}{\bf\textcolor{white}{Function (cont)}}  \tn
% Row 14
\SetRowColor{LightBackground}
ToDoubleBiFunction\textless{}T,U\textgreater{} & double \seqsplit{applyAsDouble(T} t, U u) & Accepts two reference type arguments and produces a double-valued result \tn 
% Row Count 5 (+ 5)
% Row 15
\SetRowColor{white}
ToIntBiFunction\textless{}T,U\textgreater{} & int applyAsInt(T t, U u) & Accepts two reference type arguments and produces an int-valued result \tn 
% Row Count 10 (+ 5)
% Row 16
\SetRowColor{LightBackground}
ToLongBiFunction\textless{}T,U\textgreater{} & long \seqsplit{applyAsLong(T} t, U u) & Accepts two reference type arguments and produces a long-valued result \tn 
% Row Count 15 (+ 5)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
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\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{17.67cm}}{\bf\textcolor{white}{Custom Interface}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{17.67cm}}{@FunctionalInterface \newline interface \seqsplit{CustomFunctionalInterface} \{ \newline    void display(); \newline \}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\par\addvspace{1.3em}



\end{document}