java Archives - Ebhor.com

Java Jcombobox example set selected item actionlistener getselecteditem

July 23, 2022 by manish

JComboBox is Drop down box with multiple values in Java Swing. It is defined as javax.swing.JComboBox<E>. Here E is type of element of JComboBox.

public class JComboBox
extends JComponent
implements ItemSelectable, ListDataListener, ActionListener, Accessible

public class JComboBox

extends JComponent

implements ItemSelectable, ListDataListener, ActionListener, Accessible

JComboBox Constructors Sr No Constructors and Description 1 JComboBox() Create a JComboBox with default default data model 2 JComboBox(ComboBoxModel aModel) Create a JComboBox with ComboBoxModel aModel 3 JComboBox(E[] items) Create … Read more

Simple java program to add two numbers

July 13, 2022July 13, 2022 by manish

java program to add two numbers is a very simple program. It is required by learners How can we add two numbers. We will start with simple addition and try to cover additional things here. Simple java program to add two numbers Steps to add two numbers Store two numbers in two variables Add both … Read more

Jtable in Java Swing Example defaulttablemodel cell color

July 13, 2022July 5, 2022 by manish

JTable in Java is a swing component, that is used to show data in a two-dimensional Grid. Here we will discuss JTable Java Swing Example with various parameters It is used to display and edit data in cell format in table How to create login form in java swing Constructors of JTable in Java Swing … Read more

Print prime numbers from 1 to n in java

June 25, 2022 by manish

Print prime numbers from 1 to n in java using while loop

import java.util.Scanner;
 
public class PrimeNumberChecker {
 
    public static void main(String[] args) {
        System.out.println("Enter a  number n");
        Scanner scanner = new Scanner(System.in);
        int number1 = 1;
        int number2 = scanner.nextInt();
 
        if (number1 >= number2) {
            System.out.println("Number2 must be greater then number1");
            System.exit(0);
        }
        while (number1 <= number2) {
            int i = 2, count = 0;
            while (i <= number1 / 2) {
                if (number1 % i == 0) {
                    count++;
                    break;
                }
                i++;
 
            }
            if (count == 0) {
                System.out.println(number1 + " is prime number");
            }
            number1++;
        }
    }
}

import java.util.Scanner;

public class PrimeNumberChecker {

public static void main(String[] args) {

System.out.println("Enter a number n");

Scanner scanner = new Scanner(System.in);

int number1 = 1;

int number2 = scanner.nextInt();

if (number1 >= number2) {

System.out.println("Number2 must be greater then number1");

System.exit(0);

}

while (number1 <= number2) {

int i = 2, count = 0;

while (i <= number1 / 2) {

if (number1 % i == 0) {

count++;

break;

}

i++;

}

if (count == 0) {

System.out.println(number1 + " is prime number");

}

number1++;

}

Enter a  number n
100
1 is prime number
2 is prime number
3 is prime number
5 is prime number
7 is prime number
11 is prime number
13 is prime number
17 is prime number
19 is prime number
23 is prime number
29 is prime number
31 is prime number
37 is prime number
41 is prime number
43 is prime number
47 is prime number
53 is prime number
59 is prime number
61 is prime number
67 is prime number
71 is prime number
73 is prime number
79 is prime number
83 is prime number
89 is prime number
97 is prime number

Enter a number n

100

1 is prime number

2 is prime number

3 is prime number

5 is prime number

7 is prime number

11 is prime number

13 is prime number

17 is prime number

19 is prime number

23 is prime number

29 is prime number

31 is prime number

37 is prime number

41 is prime number

43 is prime number

47 is prime number

53 is prime number

59 is prime number

61 is prime number

67 is prime number

71 is prime number

73 is prime number

79 is prime number

83 is prime number

89 is prime number

97 is prime number

Read More Prime Number Program In Java Using While Loop

Harshad numbers

September 13, 2022June 23, 2022 by manish

In this universe, we know that the number system is the base of every mathematical model. When we talk about programming, we do deal with numbers and a way to manipulate the data variables through in-built functions and modules. Lots of concepts are there from which one is a Harshad Number. Another name of Harshad … Read more

Prime number program in java using for loop

June 8, 2022June 4, 2022 by manish

Prime number program in java using for loop is very simple. we already discussed the prime number example with the while loop. Prime number program in java using for loop

import java.util.Scanner;
public class PrimeNumberChecker {
    public static void main(String[] args) {
        System.out.println("Enter a number to check Prime or Not");
        Scanner scanner = new Scanner(System.in);
        int number = scanner.nextInt();
        int count = 0;
       for(int i=2;i<=number/2;i++){
            if (number % i == 0) {
                count++;
                break;
            }
            i++;
        }
        if(count == 0) {
            System.out.println(number + " is prime number");
        } else {
            System.out.println(number + " is not a prime number");
        }
    }
}

import java.util.Scanner;

public class PrimeNumberChecker {

public static void main(String[] args) {

System.out.println("Enter a number to check Prime or Not");

Scanner scanner = new Scanner(System.in);

int number = scanner.nextInt();

int count = 0;

for(int i=2;i<=number/2;i++){

if (number % i == 0) {

count++;

break;

}

i++;

}

if(count == 0) {

System.out.println(number + " is prime number");

} else {

System.out.println(number + " is not a prime number");

}

Prime Number Between Given Range In Java using for loop

import java.util.Scanner;
 
public class PrimeNumberChecker2 {
 
    public static void main(String[] args) {
        System.out.println("Enter a number range to generate prime numbers in between");
        Scanner scanner = new Scanner(System.in);
        int number1 = scanner.nextInt();
        int number2 = scanner.nextInt();
 
        if (number1 >= number2) {
            System.out.println("Number2 must be greater then number1");
            System.exit(0);
        }
        for(int j=number1;j<=number2;j++){
             int count = 0;
           for(int i=2;i<=j/2;i++){
                if (j % i == 0) {
                    count++;
                    break;
                }
            }
            if (count == 0) {
                System.out.println(number1 + " is prime number");
            }
            number1++;
        }
    }
}

import java.util.Scanner;

public class PrimeNumberChecker2 {

public static void main(String[] args) {

System.out.println("Enter a number range to generate prime numbers in between");

Scanner scanner = new Scanner(System.in);

int number1 = scanner.nextInt();

int number2 = scanner.nextInt();

if (number1 >= number2) {

System.out.println("Number2 must be greater then number1");

System.exit(0);

}

for(int j=number1;j<=number2;j++){

int count = 0;

for(int i=2;i<=j/2;i++){

if (j % i == 0) {

count++;

break;

}

if (count == 0) {

System.out.println(number1 + " is prime number");

}

number1++;

}

Find out Duplicate Number between 1 to n numbers in java

May 31, 2022May 31, 2022 by manish

Find out duplicate number between 1 to n numbers in java is generally ask in interviews. Here we are going to find a duplicate number between 1 and n. n is any user given number. We have to check which number is duplicate. For example In above figure first row contains number 12 two times … Read more

Java Scanner Class Getting Input from user and file

May 26, 2022May 25, 2022 by Manish Sahu

Java Scanner class is used to take input from users and file. Scanner class is defined as java.util.Scanner It is defined as a final class and extends the Object class and implements Iterator<String> and Closeable interface.

public final class Scanner
extends Object
implements Iterator<String>, Closeable

public final class Scanner

extends Object

implements Iterator<String>, Closeable

Scanner class reads data in form of tokens and break token based on the delimiter the default delimiter … Read more

Sending mail using java mail API

May 26, 2022May 24, 2022 by Manish Sahu

import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;

public class SendMail {

    public static void main(String args[]) throws Exception {

        String host = "smtp.gmail.com";
        String from = "mailid@gmail.com";
        String pass = "password";
        String port = "587";

        String to = "tomailid@gmail.com"; 
        Properties props = System.getProperties();
        props.put("mail.smtp.starttls.enable", "true"); // required for gmail
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.user", from);
        props.put("mail.smtp.password", pass);
        props.put("mail.smtp.port", port);
        props.put("mail.smtp.auth", "true");



        Session session = Session.getDefaultInstance(props, null);
        MimeMessage message = new MimeMessage(session);
        message.setFrom(new InternetAddress(from));
        InternetAddress toAddress = new InternetAddress();

        toAddress = new InternetAddress(to);
        System.out.println(Message.RecipientType.TO);

        message.addRecipient(Message.RecipientType.TO, toAddress);
        message.setSubject("Hello");
        message.setText("How are you");
        Transport transport = session.getTransport("smtp");
        transport.connect(host, from, pass);
        transport.sendMessage(message, message.getAllRecipients());

        transport.close();
        System.out.println("Mail Sent successfully");
    }
}

import java.util.*;

import javax.mail.*;

import javax.mail.internet.*;

public class SendMail {

public static void main(String args[]) throws Exception {

String host = "smtp.gmail.com";

String from = "[email protected]";

String pass = "password";

String port = "587";

String to = "[email protected]";

Properties props = System.getProperties();

props.put("mail.smtp.starttls.enable", "true"); // required for gmail

props.put("mail.smtp.host", host);

props.put("mail.smtp.user", from);

props.put("mail.smtp.password", pass);

props.put("mail.smtp.port", port);

props.put("mail.smtp.auth", "true");

Session session = Session.getDefaultInstance(props, null);

MimeMessage message = new MimeMessage(session);

message.setFrom(new InternetAddress(from));

InternetAddress toAddress = new InternetAddress();

toAddress = new InternetAddress(to);

System.out.println(Message.RecipientType.TO);

message.addRecipient(Message.RecipientType.TO, toAddress);

message.setSubject("Hello");

message.setText("How are you");

Transport transport = session.getTransport("smtp");

transport.connect(host, from, pass);

transport.sendMessage(message, message.getAllRecipients());

transport.close();

System.out.println("Mail Sent successfully");

}

for this java mail api should be present on your class path.

How to find String length in java Length() & without string method

May 30, 2022May 23, 2022 by manish

Get String length with String length() method To find String length in java there is a method length(). This method is used to get the length of the string. The signature of length method is:

public int length()

1	public int length()

The length method returns the length of the string. it counts the number of Unicode in string. str.length java … Read more