types of functions in java

types of functions in java

I'm happy to provide a detailed answer in English!

Java is an object-oriented programming language that supports multiple programming paradigms, including procedural, functional, and imperative programming. In Java, a function is a block of code that can be invoked repeatedly with different inputs. Here are some types of functions in Java:

Example: public void sayHello(String name) { System.out.println("Hello " + name); }

Example: public MyClass(int x, int y) { this.x = x; this.y = y; }

Example: public static void printHello() { System.out.println("Hello"); }

Example: Runnable r = () -> System.out.println("Hello");

Example: interface Print { void print(String s); }

Example: public class Outer { public class Inner { public void sayHello() { System.out.println("Hello"); } } }

Example: public void main(String[] args) { int x = 5; method(x); } public void method(int y) { System.out.println(y); }

Example: public void main(String[] args) { new Runnable() { public void run() { System.out.println("Hello"); } }.run(); }

These are some common types of functions in Java. Functions play a crucial role in Java programming, and understanding their types is essential for writing efficient, readable, and maintainable code.

Remember: "Code should be written to be understood by humans first, and machines second." - Alan Perlis

java function class

Here is a Java function class that demonstrates several common methods and concepts:

public class JavaFunctionClass {
public static int add(int a, int b) {
return a + b;
}
public static String concatenate(String a, String b) {
return a + b;
}
public static boolean isEqual(int a, int b) {
return a == b;
}
public static double calculateAverage(double[] numbers) {
double sum = 0.0;
for (double number : numbers) {
sum += number;
}
return sum / numbers.length;
}
public static void main(String[] args) {
System.out.println("Addition: " + add(5, 3));
System.out.println("Concatenation: " + concatenate("Hello", "World"));
System.out.println("Equality: " + isEqual(10, 10));
double[] numbers = {1.0, 2.0, 3.0, 4.0};
System.out.println("Average: " + calculateAverage(numbers));
}
}

In this class: