argonlaser

Reflection
Serialization/ deserialisation
Clonable
Multi threaded
Class loading
Garbage collection
String pool/ Intern - caching string literal in string pool and point to same reference
double check locking in singleton
immutable - state of the object never changes [String never gets modified]
OCP(class open to changes and close to modifications)

argonlaser

public class PrintVar {
    public static void main( String[] args ) {
        int x = 1;
        System.out.println("value of x is " + x);
    }
}

argonlaser

#include <stdio.h>

int main() {
  int x = 1;
  printf("value of x is %d\n", x);
  return 0;
}