MisterTootor M.S., B.S., A.S., A.S.B
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// program to convert date to number //date const d1 = new Date(); console.log(d1); // converting to number const result = d1.getTime(); console.log(result);
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Output
Mon Nov 09 2020 10:52:32 GMT+0545 (Nepal Time) 1604898452084
Convert Date to Number
Program to validate an email address - Using Regex
function validateEmail(email_id)
{ const regex_pattern = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))
@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
if (regex_pattern.test(email_id)) { console.log('The email address is valid');
} else { console.log('The email address is not valid');
} } validateEmail('abc123@gmail.com'); validateEmail('hello@com');
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Output
The email address is valid The email address is not valid
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// program to loop through an object using for...in loop
const student = { name: 'John', age: 20, hobbies: ['reading', 'games', 'coding'],
};
// using for...in
for (let key in student) {
let value;
// get the value
value = student[key];
console.log(key + " - " + value);
}
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Output
name - John age - 20 hobbies - ["reading", "games", "coding"]
Loop Through Object Using for...in
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// program to display the date
// get local machine date time const date = new Date();
// get the date as a string const n = date.toDateString();
// get the time as a string const time = date.toLocaleTimeString();
// display date console.log('Date: ' + n); // display time console.log('Time: ' + time);
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Output
Date: Wed Aug 26 2020 Time: 1:13:12 PM
Display Current Date
{
margin-top: 100px;
margin-bottom: 100px;
margin-right: 150px;
margin-left: 80px;
}
Margins
Java Program to Add two Numbers
First Example: Sum of two numbers
public class AddTwoNumbers {
public static void main(String[] args) {
int num1 = 5, num2 = 15, sum;
sum = num1 + num2;
System.out.println("Sum of these numbers: "+sum);
}
}
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Output:
Sum of these numbers: 20
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Second Example: Sum of two numbers using Scanner
The scanner allows us to capture the user input so that we can get the values of both the numbers from user. The program then calculates the sum and displays it.
Import java.util.Scanner;
public class AddTwoNumbers2 {
public static void main(String[] args) {
int num1, num2, sum;
Scanner sc = new Scanner(System.in);
System.out.println("Enter First Number: ");
num1 = sc.nextInt();
System.out.println("Enter Second Number: ");
num2 = sc.nextInt();
sc.close();
sum = num1 + num2;
System.out.println("Sum of these numbers: "+sum);
}
}
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Output:
Enter First Number:
121
Enter Second Number:
19
Sum of these numbers: 140
Basic Date Formatting
package com.ack.j2se.date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
public class BasicDateFormatting {
public static void main( String[] args ) throws Exception {
// get today's date
Date today = Calendar.getInstance().getTime();
// create a short version date formatter
DateFormat shortFormatter
= SimpleDateFormat.getDateInstance( SimpleDateFormat.SHORT );
// create a long version date formatter
DateFormat longFormatter
= SimpleDateFormat.getDateInstance( SimpleDateFormat.LONG );
// create date time formatter, medium for day, long for time
DateFormat mediumFormatter
= SimpleDateFormat.getDateTimeInstance( SimpleDateFormat.MEDIUM,
SimpleDateFormat.LONG );
// use the formatters to output the dates
System.out.println( shortFormatter.format( today ) );
System.out.println( longFormatter.format( today ) );
System.out.println( mediumFormatter.format( today ) );
// convert form date -> text, and text -> date
String dateAsText = shortFormatter.format( today );
Date textAsDate = shortFormatter.parse( dateAsText );
System.out.println( textAsDate );
}
}