#code

Author: basahota

CalculatorImpl.java

@@ -0,0 +1,39 @@
+package com.javatechie.lambda.demo;
+
+interface Calculator {
+
+	// void switchOn();
+
+	/* void sum(int input); */
+
+	int substract(int i1, int i2);
+}
+
+public class CalculatorImpl {
+
+	public static void main(String[] args) {
+
+		/*
+		 * Calculator calculator = () -> System.out.println("Switch On");
+		 * 
+		 * calculator.switchOn();
+		 */
+
+		/*
+		 * Calculator calculator = (input) -> System.out.println("Sum : " + input);
+		 * calculator.sum(394);
+		 */
+
+		Calculator calculator = (i1, i2) -> {
+			if (i2 < i1) {
+				throw new RuntimeException("message");
+			} else {
+				return i2 - i1;
+			}
+		};
+
+		System.out.println(calculator.substract(8, 20));
+	}
+
+	// () -> {body};
+}

MyFunctionalInterface.java

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+package com.javatechie.lambda.demo;
+
+public interface MyFunctionalInterface {
+
+	void m1();
+
+	default void m2() {
+		System.out.println("Default method-1");
+	}
+
+	default void m3() {
+		System.out.println("Default method-2");
+	}
+
+	static void m4() {
+		System.out.println("static method-1");
+	}
+}