//#6 2 Number Adder(Calculator) from user input

// This for Scan anything entered by user (user inputs)
import java.util.Scanner;

class myClass {
public static void main(String[] args) {

int x,y,Sum;

Scanner s = new Scanner(System.in);
// it will take input from keyboard

System.out.println("Enter 1st Number: ");
x = s.nextInt(); // scanning

System.out.println("Enter 2nd Number: ");
y = s.nextInt(); // scanning

Sum = x+y;
System.out.println("Sum = "+ Sum);
}
}

Jiske pass Laptop nhi hai 👇
Mobile best Compiler's

C Compiler Click Here
C++ Compiler Click Here
Python Compiler Click Here
Java Compiler Click Here
Sql Compiler Click Here

Universal Compilers for mobile

Replit (web or app) Click Here
Jdoodle(web or app) Click Here
Programize (web) Search web

For any help Freely Say here

// Percentage Calculator in Java

import java.util.Scanner;

public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);

// #For_Taking_Total_Sub_and_Max_Marks
System.out.print("Total subjects: ");
int tsub = sc.nextInt();
System.out.print("\nMax Marks: ");
float mmark = sc.nextInt();
System.out.println("");

int [] arr = new int[tsub];

// #For_taking_Subject_values
for (int i =0; i< tsub;i++){
System.out.print("Enter Marks of "+(i+1)+": ");
arr[i] = sc.nextInt();
}

float percent, avg=0, iper;

// #For_Showing_Results_and_Percentage
for (int i =0; i< tsub;i++){
System.out.println("\nMarks of "+(i+1)+" is "+arr[i]);
iper = ((arr[i]/mmark)*100);
System.out.println("Percentage of "+(i+1)+" is "+ iper);
avg = avg + iper;
}

percent = avg/tsub;

System.out.println("\nTotal Percent: "+ percent+ "%");

}
} // @Java_Codes_Pro

//enum code for advance java

enum Day{
SUN("sunday"), MON("monday"), TUE("tuesday"), WED("wednesday"), THU("thursday"), FRI("friday"), SAT("saturday");
public String Valu;
Day(String valu){
this.Valu = valu;
}

public String getValue(){
return Valu;
}
}

public class Main {
public static void main(String[] args) {
Day d = Day.MON;
System.out.println("Enum name: " + d.name() + " Value is " + d.getValue());

for(Day e: Day.values()){
System.out.println(e.name() + " " +e.getValue());
}
}
} // @Java_Codes_pro

// Serialization - Deserialization Advance java concept

// Warning : for using this code change path of 'filename' (written below in Serializ class) to your file path

import java.io.*;

class Student implements Serializable {
private static final long serialVersionUID = 1L;

private String name;
private int age;
private String address;
// transient int x; if we create this then this will be no serialized

public Student(String name, int age, String address) {
this.name = name;
this.age = age;
this.address = address;
}

public void setName(String name) {
this.name = name;
}

public void setAge(int age) {
this.age = age;
}

public void setAddress(String address) {
this.address = address;
}

public String getName() {
return name;
}

public int getAge() {
return age;
}

public String getAddress() {
return address;
}

public String get(String z){
return z;
}

public int get(int age){
return age;
}

@Override
public String toString() {
return ("Student name is " + this.getName() + ", age is " + this.getAge() + ", and address is "
+ this.getAddress());
}
}

public class Serializ {
public static void main(String[] args) {
Student student = new Student("Sid", 19, "UP India");
FileOutputStream fileOut = null;
ObjectOutputStream objOut = null;
String filename = "C:\\Users\\mynms\\Desktop\\BCA\\Code\\Java2\\unit 4\\Test.txt";
// Serialization
try {
fileOut = new FileOutputStream(filename);
objOut = new ObjectOutputStream(fileOut);

objOut.writeObject(student);
objOut.close();
fileOut.close();

System.out.println("Object has been serialized: " + student);
} catch (Exception e) {
System.out.println("Not Serialized");
}

// Deserialization
FileInputStream fileIn = null;
ObjectInputStream objIn = null;

try {
fileIn = new FileInputStream(filename);
objIn = new ObjectInputStream(fileIn);

Student object = (Student) objIn.readObject();

System.out.println("Object has been deserialized " + object);

objIn.close();
fileIn.close();

} catch (IOException e) {
System.out.println("IO Exception " + e);
}
catch(ClassNotFoundException e){
System.out.println("Class not found exception " + e);
}
}
} // @Java_Codes_Pro

// File input Output Byte stream : Advance Java
// Warning : to use this code please change following path

import java.io.*;

public class File {
public static void main(String[] args) throws IOException {
FileInputStream inStream = new FileInputStream(
"C:\\Users\\mynms\\Desktop\\BCA\\Code\\Java2\\unit 4\\ReadFrom.txt");

FileOutputStream outStream = new FileOutputStream(
"C:\\Users\\mynms\\Desktop\\BCA\\Code\\Java2\\unit 4\\SendTo.txt");

// Reads byte at a time, it reached end of the file, returns -1
int content;

try {
while ((content = inStream.read()) != -1) {
outStream.write((byte) content);
}
System.out.println("File transfer conpleted successfully");
}

finally{
if (inStream != null)
inStream.close();

if (outStream != null)
outStream.close();
}
}
} // @Java_Codes_Pro

// File input Output Byte stream : Advance Java

// Counting spaces, fullstops, characters, words and transfering

// Warning : to use this code please change following path

import java.io.*;

public class filecount {

static boolean isChar(int content){
return (content > 64 && content < 91 || content > 96 && content < 124);
}
public static void main(String[] args) throws IOException {

FileInputStream inStream = new FileInputStream(
"C:\\Users\\mynms\\Desktop\\BCA\\Code\\Java2\\unit 4\\ReadFrom.txt");

FileOutputStream outStream = new FileOutputStream(
"C:\\Users\\mynms\\Desktop\\BCA\\Code\\Java2\\unit 4\\SendTo.txt");

// Reads byte at a time, it reached end of the file, returns -1
int content;
int whitespaces = 0;
int fullstops = 0, chars = 0, words = 0;
boolean w = false;

try {
while ((content = inStream.read()) != -1) {
outStream.write((byte) content);

if(' ' == content)
whitespaces = whitespaces + 1;

if('.' == content)
fullstops += 1;

if(isChar(content)){
w = true;
chars += 1;
}
else if(w){
words += 1;
w = false;
}

}
if(isChar(content)){
w = true;
chars += 1;
}
else if(w){
words += 1;
w = false;
}

System.out.println("Whitespaces: " + whitespaces + "\nCharacters: " + chars + "\nFullstops: " + fullstops + "\nWords: "+ words);

System.out.println("File transfer conpleted successfully");

} finally{
if (inStream != null)
inStream.close();

if (outStream != null)
outStream.close();
}
}

} // @Java_Codes_Pro

// Server Code

import java.net.*;
import java.io.*;

class Server {
ServerSocket server;
Socket socket;
BufferedReader br;
PrintWriter out;

// Constructor

public Server() {
try {
server = new ServerSocket(7777);
System.out.println("Server is ready to accept connection");
System.out.println("Waiting for client");
socket = server.accept();

br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out = new PrintWriter(socket.getOutputStream());

startReading();
startWritting();

}
catch (Exception e) {
e.printStackTrace();
}

}

public void startReading() {
// thread reading
Runnable r1 = () -> {
System.out.println("Reader started..");

try {
while (true) {
String msg = br.readLine();
if (msg.equals("exit")) {
System.out.println("Client terminated the chat, Please press enter to free port");
socket.close();
break;
}
System.out.println("Client: " + msg);
}
} catch (Exception e) {
System.out.println("Connection Closed");
}
};
new Thread(r1).start();
}

public void startWritting() {
// thread sending data
Runnable r2 = () -> {
System.out.println("Writter started..");
String content = "";
try {
while (!socket.isClosed()) {

BufferedReader br1 = new BufferedReader(new InputStreamReader(System.in));
content = br1.readLine();
out.println(content);
out.flush();

if (content.equals("exit")) {
System.out.println("You terminated the chat");
socket.close();
break;
}
}
}
catch (Exception e) {
if (content.equals("exit")) {
System.out.println("Connection Closed successfully");
}
else{
System.out.println("Connection terminated unsuccssefully \nTermnate all existing cmd's or check other errors");
}
}
};
new Thread(r2).start();
}

public static void main(String[] args) {
System.out.println("This is server.. going to start server");
new Server();
}
} // Server C

import java.io.*;
import java.net.*;

public class Client {
Socket socket;
BufferedReader br;
PrintWriter out;

public Client() {

try {
System.out.println("Connecting to the server.");
socket = new Socket("127.0.0.1", 7777);
System.out.println("Connection successfull..");

br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out = new PrintWriter(socket.getOutputStream());

startReading();
startWritting();

} catch (Exception e) {
System.out.println("Error: Firstly run Server Code");
}
}

public void startReading() {
// thread reading
Runnable r1 = () -> {
System.out.println("Reader started..");
try {
while (true) {

String msg = br.readLine();
if (msg.equals("exit")) {
System.out.println("Server terminated the chat, Please press enter to free port");
socket.close();
break;
}
System.out.println("Server: " + msg);
}
} catch (Exception e) {
System.out.println("Connection Closed");
}
};
new Thread(r1).start();
}

public void startWritting() {
// thread sending data
Runnable r2 = () -> {
System.out.println("Writter started..");
String content = "";
try {
while (!socket.isClosed()) {

BufferedReader br1 = new BufferedReader(new InputStreamReader(System.in));

content = br1.readLine();

out.println(content);
out.flush();

if (content.equals("exit")) {
System.out.println("You terminated the chat");
socket.close();
break;
}
}
} catch (Exception e) {
if (content.equals("exit")) {
System.out.println("Connection Closed successfully");
}
else{
System.out.println("Connection terminated unsuccssefully \nTermnate all existing cmd's or check other errors");
}
}
};
new Thread(r2).start();
}

public static void main(String[] args) {
System.out.println("Going to start Client..");
new Client();
}
} // Client Code : @Java_Codes_Pro

Java Chat Code(2 Program sent Copy both (Server Code and Client Code) run And Practice with them)

// Factotial from recursion in java

import java.util.Scanner;

public class Main {
public static void main(String[] args) {

Scanner s = new Scanner(System.in);
System.out.print("Enter Number: " );
int n = s.nextInt();
if(n>26)
System.out.print("Please enter number less than 25\n" );
else{

System.out.println("Showing factorial for "+ n + " Number" );
System.out.print("\n" +Main.f(n));
}
}

// Factorial value calculation + series printing
static long f(long n){
if (n==1){
System.out.print(n);
return n;
}
else{
System.out.print(n + " * ");
return n*f(n-1);
}
}

} // @Java_Codes_Pro

// Factotial from loop in java
// see recursive approach in upper code
import java.util.Scanner;

public class Main {
public static void main(String[] args) {

Scanner s = new Scanner(System.in);
System.out.print("Enter Number: " );
int n = s.nextInt();
if(n>26)
System.out.print("Please enter number less than 25\n" );
else{

System.out.println("Showing factorial for "+ n + " Number" );
System.out.print("\n" +Main.f(n));
}
}

// Factorial value calculation + series printing
static long f(int n){
long h = 1;
for(int i = n; 0 < i; i-- ){
if(i == 1){
System.out.print(i);
continue;
}
System.out.print(i +" * " );
h = i*h;
}
return h;
}
}
// Join now @Java_Codes_Pro

Learn how to create Telegram Bot
Also clear Javascript basics
(Regular video Uploading...)

https://youtube.com/playlist?list=PLjEYzWkdEvxvar65MToPfkA1x4CeZ_bNk

All Codes
@C_Code5
@CPP_Coding
@Python_Codes_Pro
@Java_Codes_Pro
@jsCode0

Discussion
@bca_mca_btech

// java basic threads example

public class MultithreadingExample {
    public static void main(String[] args) {

        // Creating and starting two threads
        Thread thread1 = new MyThread("Thread 1");
        Thread thread2 = new MyThread("Thread 2");
        thread1.start();
        thread2.start();
    }
}

class MyThread extends Thread {
    private String threadName;

    public MyThread(String name) {
        threadName = name;
    }

    public void run() {
        for (int i = 1; i <= 5; i++) {
            System.out.println(threadName + " - Count: " + i);
            try {
                Thread.sleep(1000); // Pause for 1 second
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
} // @Java_Codes_Pro

// #1 Your First Program

class HelloWorld {

public static void main(String[] args){
    System.out.println("Hello, World!");
     }

}

// #2 For Adding 2 numbers

public class MyClass {

public static void main(String args[]) {
int x=10;
int y=25;
int z=x+y;
System.out.println("Sum of x+y = " + z);
}

}

// Airthmetic Operations in Java

public class MyClass {
  public static void main(String args[]) {
    
   // declaring variables
     int add, sub, div, mul, r;
    
     // Declaring two varables
     int x=4;
     int y=2;
    
    // performing Operations
     add = x+y;    // Addition
     sub = x-y;     // Subtraction
     div = x/y;      // Division
     mul = x+y;     // Multiply
     r= x%y;     // re m inder
    
   // Showing results
     System.out.println("4 + 2 = "+ add);
     System.out.println("4 - 2 = "+ sub);
     System.out.println("4 * 2 = "+ mul);
     System.out.println("4 / 2 = "+ div);
     System.out.println("4 % 2 = "+ r);
  }
}

// in this i introduced operators in java
// code by @Java_Codes_Pro
// buttons by @IOChannel_Bot
// Compiler @Compiler0bot

Are You tried these patterns ?

public class NumberTrianglePattern {
public static void main(String[] args) {
int rows = 5;

for (int i = 1; i <= rows; i++) {
for (int j = 1; j <= i; j++) {
System.out.print(j + " ");
}
System.out.println();
}
}
} // @Java_Codes_Pro