Represents a function that accepts an int-valued argument and produces a result. This is the int -consuming primitive specialization for Function. This is a functional interface whose functional method is apply(int).

Oct 8, 2018 · The IntFunction Interface is a part of the java.util.function package which has been introduced since Java 8, to implement functional programming in Java. It represents a function which takes in an int-valued argument and produces a result of type R.

The Integer class wraps a value of the primitive type int in an object. An object of type Integer contains a single field whose type is int.

Apr 16, 2025 · The Function Interface is a part of the java.util.function package that has been introduced since Java 8, to implement functional programming in Java. It represents a function that takes in one argument and produces a result. Hence, this functional interface takes in 2 generics, namely as follows:

Jul 14, 2012 · When you call displayResult in main, you need to actually pass it values, rather than repeat the types and names of the arguments. For example: displayResult(2, 3); That should work, but it still won't do anything; displayResult returns the result, but it doesn't print it or do anything else with it.

In Java, the IntFunction interface is a functional interface that represents a function that accepts an int -valued argument and produces a result. It is part of the java.util.function package and is commonly used for operations that transform or process int values into other types.

Apr 17, 2013 · I'll explain the multiple branches with a couple examples: public int someMethod(int i) { if(i == 0) { return i; } } This method will not compile due to the fact that what happens if i is not equal to 0, the compiler does't know how to return the method. To fix this, either add an else, or a final return statement, either of these will work.

Jul 20, 2023 · Explore the IntFunction interface in Java with examples. Learn how to use this functional interface for lambda expressions and method references.

Apr 16, 2025 · The java.util.function.IntFunction interface represents a function that accepts an int-valued argument and produces a result. It is a functional interface with a single abstract method apply. IntFunction is specialized for primitive int inputs to avoid boxing overhead. IntFunction is part of Java's functional programming utilities added in Java 8.

Aug 12, 2020 · IntFunction is an in-built functional interface in the java.util.Function package. It accepts an argument of int data type, operates on it and produces a result of any data type.