QUE 1. Consider a car share system in which drivers pick up other riders, enabling them to make money during their commute while reducing traffic congestion. Riders wait at pickup points, are dropped off at their destination, and pay for the distance traveled. Drivers get a monthly payment. An app lets drivers and riders enter their route and time. It notifies drivers and riders and handles billing. Find classes that would be useful for designing such a system.

QUE 2. Which of the following classes are immutable? a. Rectangle b. String c. Random d. PrintStream e. Date f. Integer

QUE 3. On which classes does the class Integer in the standard library depend?

QUE 4. Classify the methods of the Java Rectangle class as accessor or mutator methods.

QUE 5. Consider the following method that is intended to swap the values of two integers: public static void falseSwap(int a, int b) { int temp = a; a = b; b = temp; }

public static void main(String [] args) {

int x = 3; int y = 4;

falseSwap(x, y);

System.out.println(x + " , " + y);

}

Why doesn't the method swap the contents of x and y?