codelab

Java Program To Swap Two Numbers Without Temporary Variable import java.util.Scanner; class SwapNumbers { public static void main(String args[]) { int x, y; System.out.println("Enter x and y:"); Scanner n = new Scanner(System.in); x = n.nextInt(); y = n.nextInt(); System.out.println("Before Swapping:\nx = "+x+"\ny = "+y); x = x + y; y = x - y; x = x - y; System.out.println("After Swapping:\nx = "+x+"\ny = "+y); n.close(); }} Java Program To Swap Two Numbers Using Temporary Variable import java.util.Scanner; class SwapNumbers2 { public static void main(String args[]) { int x, y, temp; System.out.println("Enter x and y:"); Scanner n = new Scanner(System.in); x = n.nextInt(); y = n.nextInt(); System.out.println("Before Swapping:\nx = "+x+"\ny = "+y);

Java Program To Find Area And Perimeter Of A Rectangle import java.util.*; public class AreaAndPerimeterOfRectangle { private static Scanner s; public static void main(String[] args) { double length, width, Area, Perimeter; s = new Scanner(System.in); System.out.print("Enter The Length Of A Rectangle =  "); length = s.nextDouble(); System.out.print("Enter The Width Of A Rectangle = "); width = s.nextDouble(); Area = length * width; Perimeter = 2 * (length + width); System.out.format("Area Of The Rectangle = %.2f\n",Area); System.out.format("Perimeter Of The Rectangle = %.2f\n", Perimeter); }} Java Program To Find Area And Perimeter Of A Rectangle Using OOP import java.util.Scanner; public class AreaAndPerimeterOfRectangle3a { private static Scanner s; public static void main(String[] args) { double length, width;  s = new Scanner(System.in);

Java Program To Reverse A Number Using Recursion (OOP) import java.util.Scanner; public class ReverseNumberUsingClassA { private static Scanner sc; public static void main(String[] args) { int Number, Reverse = 0; sc = new Scanner(System.in); System.out.print("Enter Any Number You Want To Reverse: "); Number = sc.nextInt(); ReverseNumberUsingClassB rn = new ReverseNumberUsingClassB(); Reverse = rn.NumberReverse(Number); System.out.format("\nReverse Of %d = %d",Number, Reverse); }} ReverseNumberUsingClassB.java: public class ReverseNumberUsingClassB { int Reverse = 0, Reminder; public int NumberReverse(int Number) { if(Number > 0) { Reminder = Number %10; Reverse = Reverse * 10+ Reminder; NumberReverse(Number /10); } return Reverse; }}

Problem: Java Program To Print Right Triangle Star Pattern import java.util.*; public class TrianglePattern1 { public static void main(String args[]) { int rows, i, j; Scanner in = new Scanner(System.in); System.out.print("Enter The Number Of Rows: "); rows = in.nextInt(); for(i = 1; i <= rows; i++) { for(j = 1; j <= i; ++j) { /* prints the rows of triangle */ System.out.print("* "); } System.out.print("\n"); /* move to next row */ in.close();  }}} Problem: Java Program To Print Inverted Right Triangle Star Pattern import java.util.Scanner; public class TrianglePattern2 { public static void main(String args[]) { int rows, i, j; Scanner in = new Scanner(System.in); System.out.print("Enter The Number Of Rows: "); rows = in.nextInt();