Java 8 features - class 19- Primitive Type functional Interfaces for Function-Explained in Detail

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Primitive type functional interfaces for Function:-
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1. IntFunction R
public R apply( int i)
2. LongFunction R
public R apply(long l)
3. DoubleFunction R
public R apply(double d)
4. ToIntFunction T
public int applyAsInt(T t)
5. ToLongFunction T
public long applyAsInt(T t)
6. ToDoubleFunction T
public double applyAsInt(T t)
7. IntToLongFunction
public long applyAsLong(int i)
8. IntToDoubleFunction
public double applyAsLong(int i)
9. LongToIntFunction
public int applyAsDouble(long l)
10. LongToDoubleFunction
public double applyAsDouble(long l)
11. DoubleToIntFunction
public int applyAsInt(double d)
12. DoubleToLongFunction
public long applyAslong(double d)
13. ToIntBiFunction T, U
public int applyAsInt(T t,U u);
14. TolongBiFunction T, U
public long applyAsLong(T t,U u);
15. ToDoubleBiFunction T, U
public double applyAsDouble(T t,U u);

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Please find the list of primitive interfaces attached in the description