Java.util。函数.IntBinaryOperator 接口与示例

IntBinaryOperator接口是在Java 8 中引入的。它表示对两个 int 值的操作，并将结果作为 int 值返回。它是一个函数式接口，因此可以用作 lambda 表达式或方法引用。它主要用于需要从用户封装操作的情况。

方法

1. applyAsInt() ：此函数采用两个 int 值，执行所需的操作并将结果作为 int 返回。

   public int applyAsInt(int val1, int val2)
   

将 IntBinaryOperator 接口演示为 lambda 表达式的示例。

// Java program to demonstrate IntBinaryOperator
  
import java.util.function.IntBinaryOperator;
  
public class IntBinaryOperatorDemo {
    public static void main(String[] args)
    {
        // Binary operator defined to divide
        // factorial of two numbers
        IntBinaryOperator binaryOperator = (x, y) ->
        {
            int fact1 = 1;
            for (int i = 2; i <= x; i++) {
                fact1 *= i;
            }
            int fact2 = 1;
            for (int i = 2; i <= y; i++) {
                fact2 *= i;
            }
            return fact1 / fact2;
        };
  
        System.out.println("5! divided by 7! = "
                           + binaryOperator.applyAsInt(5, 7));
        System.out.println("7! divided by 5! = "
                           + binaryOperator.applyAsInt(7, 5));
    }
}

输出：

5! divided by 7! = 0
7! divided by 5! = 42

参考： https: Java/util/函数/IntBinaryOperator.html