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Diff for: ‎BCA-V JAVA Practicle File Questions.pdf

22.8 KB
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Diff for: ‎Calc/Add.java

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package Calc;
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import java.util.Scanner;
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public class Add {
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int sum;
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public void sum()
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{
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System.out.print("Enter the first number: ");
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Scanner sc = new Scanner(System.in);
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int firstNum = sc.nextInt();
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System.out.print("Enter the second number: ");
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int secondNum = sc.nextInt();
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sum = firstNum+secondNum;
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System.out.println("Sum=" + sum);
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}
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}

Diff for: ‎Calc/Subtract.java

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package Calc;
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import java.util.Scanner;
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public class Subtract {
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int difference;
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public void subtract()
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{
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System.out.print("Enter the first number: ");
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Scanner sc = new Scanner(System.in);
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int firstNum = sc.nextInt();
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System.out.print("Enter the second number: ");
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int secondNum = sc.nextInt();
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difference = firstNum-secondNum;
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System.out.println("Difference=" + difference);
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}
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}

Diff for: ‎Q10_Overload_Area_fun.java

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//Q10. WAP to show the overloading of area function.
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package JAVA_Lab_File;
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import java.util.Scanner;
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public class Q10_Overload_Area_fun {
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static void area(double radius){
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double area = Math.PI * radius * radius;
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System.out.print("Area of Circle is: " + String.format("%.5f", area) + " sq. units");
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}
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static void area(double base, double height){
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double area = 0.5*base*height;
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System.out.print("Area of Triangle is: " + String.format("%.5f", area) + " sq. units");
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}
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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("Calculate Area: \n1.Circle\n2.Triangle\nChoice: ");
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int choice = sc.nextInt();
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if(choice == 1){
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System.out.print("Enter the radius of the circle: ");
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double radius = sc.nextDouble();
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area(radius);
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} else if (choice == 2) {
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System.out.print("Enter the base and height of the triangle: ");
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double base = sc.nextDouble();
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double height = sc.nextDouble();
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area(base, height);
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}else {
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System.out.println("Invalid choice");
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}
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}
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}

Diff for: ‎Q11_isArmstrong.java

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//Q11. WAP to check whether a given number is Armstrong or not.
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package JAVA_Lab_File;
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public class Q11_isArmstrong {
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public static void main(String[] args) {
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int number = 153, originalNumber, remainder, result = 0;
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originalNumber = number;
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while (originalNumber != 0)
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{
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remainder = originalNumber % 10;
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result += Math.pow(remainder, 3);
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originalNumber /= 10;
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}
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if(result == number) {
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System.out.println(number + " is an Armstrong number.");
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} else {
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System.out.println(number + " is not an Armstrong number.");
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}
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}
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}

Diff for: ‎Q12_Implement_interface.java

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//Q12. WAP to check whether a given number is Armstrong or not.
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package JAVA_Lab_File;
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interface Animal {
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public void animalSound();
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public void sleep();
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}
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class Siyaar implements Animal {
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public void animalSound() {
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System.out.println("The Siyaar howls: Aaooo Aaooo");
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}
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public void sleep() {
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System.out.println("Zzz");
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}
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}
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public class Q12_Implement_interface {
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public static void main(String[] args) {
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Siyaar S_Siyaar = new Siyaar();
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S_Siyaar.animalSound();
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S_Siyaar.sleep();
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}
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}

Diff for: ‎Q13_SumAndSub_Pack.java

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//Q13. WAP to create a package Calc with methods Sum() & Sub() and show the Implementation in a class.
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package JAVA_Lab_File;
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import Calc.Add;
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import Calc.Subtract;
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import java.util.Scanner;
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public class Q13_SumAndSub_Pack {
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public static void main(String[] args)
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{
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System.out.println("Sum ");
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System.out.println("Subtract ");
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System.out.print("Enter your choice: ");
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Scanner sc = new Scanner(System.in);
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int t = sc.nextInt();
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switch (t) {
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case 1 -> {
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Add a = new Add();
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a.sum();
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}
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case 2 -> {
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Subtract s = new Subtract();
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s.subtract();
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}
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default -> System.out.println("invalid choice");
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}
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}
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}

Diff for: ‎Q14_Reverse_Num.java

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//Q14. WAP to print reverse of a given number.
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package JAVA_Lab_File;
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import java.util.Scanner;
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public class Q14_Reverse_Num {
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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 no. to reverse it: ");
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int num = sc.nextInt();
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int r_num=0;
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while(num>0)
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{
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r_num=(r_num*10)+(num%10);
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num=num/10;
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}
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System.out.println("Reversed: "+ r_num);
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}
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}

Diff for: ‎Q15_Single_catch.java

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//Q15. WAP to show the working of a single Catch block.
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package JAVA_Lab_File;
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public class Q15_Single_catch {
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public static void main(String[] args) {
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try{
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int a = 10;
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int b = 0;
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int c = a/b; // exception
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}catch(ArithmeticException e){
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System.out.println(e);
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}
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}
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}

Diff for: ‎Q16_Throw_and_Throws.java

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//Q16. WAP to show working of throw and throws for handling exceptions
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package JAVA_Lab_File;
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import java.io.IOException;
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public class Q16_Throw_and_Throws {
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public static void main(String[] args) throws IOException {
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//declare exception
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Test.method();
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System.out.println("The Normal flow...");
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}
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}
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class Test {
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static void method()throws IOException
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{
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throw new IOException("Zaphkiel error");//checked exception
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}
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}
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Diff for: ‎Q17_Table_of_a_no.java

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//Q17. WAP to print table of a given number.
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package JAVA_Lab_File;
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public class Q17_Table_of_a_no {
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public static void main(String[] args) {
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int n = 5;
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for (int i = 1; i <= 10; i++) {
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System.out.println(n + " * " + i + " = " + n * i);
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}
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}
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}
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Diff for: ‎Q19_Vector_Class.java

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//Q19. WAP to show working of Vector class in java.
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package JAVA_Lab_File;
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import java.util.Iterator;
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import java.util.Vector;
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public class Q19_Vector_Class {
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public static void main(String args[]) {
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//Create a vector
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Vector<String> waifus = new Vector<String>();
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//Adding elements using add() method of List
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waifus.add("Kurumi");
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waifus.add("Rias");
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waifus.add("ZeroTwo");
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waifus.add("Yorha 2B");
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//Adding elements using addElement() method of Vector
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waifus.addElement("Akeno");
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waifus.addElement("Rindou");
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waifus.addElement("Momo");
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System.out.println("Elements are: "+waifus);
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}
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}

Diff for: ‎Q1_CLI_Argument.java

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//Q1. WAP to enter two numbers using command line argument and calculate their sum and multiplication.
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package JAVA_Lab_File;
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public class Q1_CLI_Argument {
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public static void main(String[] args) {
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int sum = Integer.parseInt(args[0]) + Integer.parseInt(args[1]);
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int multiplication = Integer.parseInt(args[0]) * Integer.parseInt(args[1]);
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System.out.println("Sum of two CLI Arguments: " + (sum));
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System.out.println("Multiplication of two CLI Arguments: " + (multiplication));
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}
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}

Diff for: ‎Q20_Border_Layout.java

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//Q20. WAP to arrange components using border layout.
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package JAVA_Lab_File;
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import javax.swing.*;
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import java.awt.BorderLayout;
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import java.awt.Button;
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import java.awt.Color;
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public class Q20_Border_Layout {
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// Main Method
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public static void main(String[] args) {
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BorderDemo obj = new BorderDemo();
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}
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}
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class BorderDemo extends JFrame{
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public BorderDemo()
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{
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setLayout(new BorderLayout());
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setBackground(Color.red);
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Button btn1 = new Button("Zaphkiel's");
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Button btn2 = new Button("Kurumi");
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Button btn3 = new Button("Tokisaki");
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Button btn4 = new Button("Nightmare");
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Button btn5 = new Button("Darling");
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add(btn1, "North");
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add(btn2, "South");
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add(btn3, "East");
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add(btn4, "West");
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add(btn5, "Center");
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setTitle("Zaphkiel's Border Layout");
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setSize(350, 300);
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setVisible(true);
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}
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}

Diff for: ‎Q21_Progress_bar.java

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//Q21. WAP to show working of a progress bar.
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package JAVA_Lab_File;
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import javax.swing.*;
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public class Q21_Progress_bar extends JFrame {
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static JFrame f;
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static JProgressBar b;
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public static void main(String[] args) {
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f = new JFrame("Zaphkiel's Progress Bar");
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b = new JProgressBar(0, 2000);
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b.setBounds(40, 40, 160, 30);
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b.setValue(0);
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b.setStringPainted(true);
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f.add(b);
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f.setSize(250, 150);
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f.setLayout(null);
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f.setVisible(true);
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f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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fill();
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}
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public static void fill()
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{
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int i = 0;
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try {
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while (i <= 100) {
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b.setValue(i + 10);
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Thread.sleep(1000);
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i += 20;
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}
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}
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catch (Exception e) {
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}
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}
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}

Diff for: ‎Q22_Thread_by_Runnable.java

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//Q22. WAP to create threads by using Runnable interface
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package JAVA_Lab_File;
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public class Q22_Thread_by_Runnable implements Runnable {
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public void run() {
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System.out.println("Thread Implemented by Runnable interface is running...");
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}
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public static void main(String[] args) {
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Q22_Thread_by_Runnable obj = new Q22_Thread_by_Runnable();
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Thread t1 = new Thread(obj);
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t1.start();
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}
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}

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