Pass Method as Argument to Other Method in Java

public class PassMethod {
    public int add(int a, int b) {
        int sum = a + b;
        return sum;
    }
    public void square(int num) {
        int result = num * num;
        System.out.println(result);
    }
    public static void main(String[] args) {
        PassMethod obj = new PassMethod ();
      
        // calling the square() method
        // passing add() as parameter

        obj.square(obj.add(8, 1));
    }
}

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• In this program, first a class called PassMethod is created.
• Then two methods called add and square are created which return the sum of two numbers and display a number’s square respectively.
• Next, in the main method of the class, an object obj of Main class is created.
• The square() method is called with another method add() passed as its parameter. The add method has two numbers passed as its parameters. Thus, a method is passed as a parameter in another method.