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JAVA

 1. Display Current Date and Time


import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
public class CurrentDateTime{
    public static void main(String[] args){
        LocalDateTime current = LocalDateTime.now(); DateTimeFormatter
formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS");

       String formatted = current.format(formatter);
       System.out.println("Current Date and Time is: \n" + formatted);
    } 
}


Output :-

This will print the current date and time of your place.

Current Date and Time is: 
2021-04-24 19:58:00.406



2. Get IP Address


import java.net.InetAddress;

class GetMyIPAddress
{
   public static void main(String args[]) throws Exception
   {
     
      InetAddress myIP=InetAddress.getLocalHost();
 
     
      System.out.println("My IP Address is:");
      System.out.println(myIP.getHostAddress());
  }
}


Output :-


My IP Address is:
10.8.3.55



3. Check Leap Year


import java.util.Scanner;
public class Demo {

    public static void main(String[] args) {

    int year;
    Scanner scan = new Scanner(System.in);
    System.out.println("Enter any Year:");
    year = scan.nextInt();
    scan.close();
        boolean isLeap = false;

        if(year % 4 == 0)
        {
            if( year % 100 == 0)
            {
                if ( year % 400 == 0)
                    isLeap = true;
                else
                    isLeap = false;
            }
            else
                isLeap = true;
        }
        else {
            isLeap = false;
        }

        if(isLeap==true)
            System.out.println(year + " is a Leap Year.");
        else
            System.out.println(year + " is not a Leap Year.");
    }
}


Output :-


Enter any Year: 2021

2021 is not a Leap Year.



4. Shut Down PC 


import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

class PCShutdown {
    public static void main(String[] args) throws IOException{
        Runtime run = Runtime.getRuntime();
        BufferedReader buffreader = new BufferedReader(
            new InputStreamReader(System.in));
        System.out.println("Enter the number of seconds after"+"Which you want                                         your computer to shutdown");
        long a = Long.parseLong(buffreader.readLine());
        Process pro = run.exec("shutdown -s -t"+a);
        System.exit(0);
    }
}


Warning :- By running this code, your pc will be shutdown. So, for try this code make sure you clear all the running applications.

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