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‎GuessGame.java‎

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import java.util.Random;
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import java.util.Scanner;
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public class GuessGame {
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public static void main(String[] args) {
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Random rand = new Random();
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Scanner sc = new Scanner(System.in);
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int number = rand.nextInt(100) + 1;
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int guess;
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System.out.println("Guess a number between 1 and 100:");
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do {
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guess = sc.nextInt();
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if (guess > number) {
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System.out.println("Too high! Try again:");
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} else if (guess < number) {
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System.out.println("Too low! Try again:");
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} else {
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System.out.println("Correct! The number was " + number);
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}
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} while (guess != number);
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}
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}
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‎LineCoding.java‎

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import java.util.Scanner;
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public class LineCoding {
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// Function for Unipolar NRZ
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static void unipolarNRZ(int[] data) {
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System.out.println("Unipolar NRZ Encoding:");
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for (int bit : data) {
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if (bit == 1) System.out.print("[+1] ");
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else System.out.print("[0] ");
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}
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System.out.println();
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}
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// Function for Polar NRZ
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static void polarNRZ(int[] data) {
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System.out.println("Polar NRZ Encoding:");
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for (int bit : data) {
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if (bit == 1) System.out.print("[+1] ");
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else System.out.print("[-1] ");
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}
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System.out.println();
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}
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// Function for Manchester Encoding
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static void manchester(int[] data) {
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System.out.println("Manchester Encoding:");
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for (int bit : data) {
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if (bit == 1) System.out.print("[+1, -1] ");
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else System.out.print("[-1, +1] ");
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}
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System.out.println();
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}
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// Function for Differential Manchester Encoding
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static void differentialManchester(int[] data) {
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System.out.println("Differential Manchester Encoding:");
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int current = 1; // Assume starting high (+1)
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for (int bit : data) {
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if (bit == 1) {
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// Transition at beginning
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current = -current;
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}
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// Always transition at mid-bit
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if (current == 1) System.out.print("[+1, -1] ");
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else System.out.print("[-1, +1] ");
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current = -current; // flip for next bit
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}
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System.out.println();
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}
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public static void main(String[] args) {
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try (Scanner sc = new Scanner(System.in)) {
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// Step 1: Input number of bits
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System.out.print("Enter the number of bits in the data: ");
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int n = sc.nextInt();
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int[] data = new int[n];
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// Step 2: Input binary sequence
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System.out.println("Enter the binary data bits (0s and 1s): ");
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for (int i = 0; i < n; i++) {
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data[i] = sc.nextInt();
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if (data[i] != 0 && data[i] != 1) {
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System.out.println("Invalid input. Only 0s and 1s allowed.");
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return;
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}
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}
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// Step 3: Choose encoding method
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System.out.println("\nChoose a line coding technique:");
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System.out.println("1. Unipolar NRZ");
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System.out.println("2. Polar NRZ");
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System.out.println("3. Manchester");
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System.out.println("4. Differential Manchester");
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System.out.print("Enter your choice (1-4): ");
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int choice = sc.nextInt();
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// Step 4: Call respective function
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switch (choice) {
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case 1 -> unipolarNRZ(data);
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case 2 -> polarNRZ(data);
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case 3 -> manchester(data);
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case 4 -> differentialManchester(data);
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default -> System.out.println("Invalid choice. Please select between 1 and 4.");
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}
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sc.close();
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}
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}
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}

‎java.java‎

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import java.util.Scanner;
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public class java {
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public static void main(String[] args) {
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// Scanner sc = new Scanner(System.in);
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// System.out.println("Enter a number:");
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// int num = sc.nextInt();
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// if(num%2==0){
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// System.out.println("The given number is even!");
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// }
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// else{
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// System.out.println("The given number is odd!");
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// }
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// Scanner sc = new Scanner(System.in);
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// String opertations--------------------------------------------------
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// Scanner sc = new Scanner(System.in);
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// System.out.println("Enter a string:");
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// String s = sc.nextLine();
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// System.out.println("Length of string:"+s.length());
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// System.out.println(s.toLowerCase());
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// System.out.println(s.toUpperCase());
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// //counting number of vowels in a string
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// int vowels = 0;
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// for(int i=0; i<s.length(); i++){
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// char ch = s.charAt(i);
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// if(ch=='a' || ch=='e' || ch=='i' || ch=='o' || ch=='u' || ch=='A' || ch=='E' || ch=='I' || ch=='O' || ch=='U'){
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// vowels++;
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// }
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// }
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// System.out.println("Number of vowels in the string:"+vowels);
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// ----------------------------------------------------------
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// 1. String
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// Scanner sc = new Scanner(System.in);
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// String name;
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// System.out.print("Enter your name: ");
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// name = sc.nextLine();
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// System.out.println("Hello, " + name);
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// System.out.println("Length = " + name.length());
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// System.out.println("Upper case = " + name.toUpperCase());
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// System.out.println("Lower case = " + name.toLowerCase());
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// // 2. Break
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// for (int i = 1; i <= 5; i++) {
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// if (i == 3) break; // Exits loop
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// System.out.println("i = " + i);
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// }
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// // 3. Continue
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// for (int i = 1; i <= 5; i++) {
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// if (i == 3) continue; // Skips the rest of the loop when i is 3
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// System.out.println("i = " + i);
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// }
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// 4. Return
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// System.out.println("Before return");
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// if (true) return;
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// System.out.println("After return");
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// 5. Reverse a number
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try (
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Scanner scanner = new Scanner(System.in)) {
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System.out.print("Enter a number: ");
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int number = scanner.nextInt();
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int reversed = 0;
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while (number > 0) {
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int digit = number % 10;
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reversed = reversed * 10 + digit;
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number /= 10;
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}
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System.out.println("Reversed number: " + reversed);
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}
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// 6. While loop
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int i = 1;
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while (i <= 5) {
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System.out.println("While loop count: " + i);
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i++;
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}
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int count = 1;
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do {
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System.out.println("Do-While count: " + count);
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count++;
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} while (count <= 5);
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}
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}
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‎java1.java‎

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import java.util.Scanner;
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public class java1 {
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public static void main(String[] args) {
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Scanner sc = new Scanner(System.in);
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System.out.print("Enter a number: ");
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int n = sc.nextInt();
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boolean isPrime = true;
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if (n <= 1) isPrime = false;
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else {
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for (int i = 2; i <= Math.sqrt(n); i++) {
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if (n % i == 0) {
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isPrime = false;
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break;
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}
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}
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}
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System.out.println(n + (isPrime ? " is Prime" : " is Not Prime"));
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}
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}
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‎java_program.java‎

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import java.util.Arrays;
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import java.util.Scanner;
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public class java_program {
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public static void main(String[] args){
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System.out.println("First java program");
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System.out.println("Hello java");
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System.out.println("Java is one of the programming language");
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int a = 5 , b = 10;
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System.out.println("addition:"+ (a+b));
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System.out.println("sub:"+(a-b));
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System.out.println("mul:"+(a*b));
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System.out.println("div:"+(a/b));
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System.out.println("modulus:"+(a%b));
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try (Scanner sc = new Scanner(System.in)) {
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System.out.println("Enter first no:");
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int num1 = sc.nextInt();
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System.out.println("Enter second no:");
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int num2 = sc.nextInt();
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System.out.println("Addition:"+(num1+num2));
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System.out.println("multiplication:"+(num1*num2));
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System.out.println("Modulus:"+(num1%num2));
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System.out.println("Subtraction:"+(num1-num2));
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System.out.println("Division:"+(num1/num2));
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if (num2!=0) {
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double division = (double) num1 / num2;
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System.out.println("Division:" + division);
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} else {
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System.out.println("Division by zero is not allowed.");
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}
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if(num2!=0){
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double modulo = (double) num1 % num2;
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System.out.println("Modulo:" + modulo);
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} else {
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System.out.println("Modulus by zero is not allowed.");
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}
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int []nums={1,2,3};
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for(int n : nums){
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System.out.println( n);
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}
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int [] [] num = {{1,2},{5,6}};
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System.out.println(num[0][0]);
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System.out.println(num[0][1]);
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System.out.println(num[1][0]);
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System.out.println(num[1][1]);
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System.out.println("Enter the size of the array:");
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int size = sc.nextInt();
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int[] userNums = new int[size];
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System.out.println("Enter"+ size +"numbers");
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for(int i = 0; i<size;i++) userNums[i]=sc.nextInt();
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System.out.println("Enetr array elements:"+Arrays.toString(userNums));
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int sum =0;
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for(int n:userNums) sum+=n;
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System.out.println("Sum of array elements:"+sum);
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}
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}
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}
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‎matrixaddition.java‎

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public class matrixaddition {
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public static void main(String[] args) {
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int a[][]={{5,6,4},{15,8,5},{8,3,9}};
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int b[][]={{9,8,2},{6,5,6},{1,5,10}};
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int c[][]=new int[3][3];
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for(int i=0;i<3;i++){
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for(int j=0;j<3;j++){
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c[i][j]=a[i][j]+b[i][j];
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}
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}
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for(int i=0;i<3;i++){
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for(int j=0;j<3;j++){
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System.out.print(c[i][j]+" ");
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}
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System.out.println();
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}
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}
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}

‎matrixmultiplication.java‎

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public class matrixmultiplication {
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public static void main(String[] args) {
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int a[][]={{1,2,3},{4,5,6},{7,8,9}};
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int b[][]={{9,8,7},{6,5,4},{3,2,1}};
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int c[][]=new int[3][3];
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for(int i=0;i<3;i++){
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for(int j=0;j<3;j++){
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c[i][j]=0;
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for(int k=0;k<3;k++){
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c[i][j]+=a[i][k]*b[k][j];
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}
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}
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}
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for(int i=0;i<3;i++){
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for(int j=0;j<3;j++){
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System.out.print(c[i][j]+" ");
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}
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System.out.println();
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}
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}
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}

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