Calculator program

Author: VikramGujar

src/com/lab/dec_24/Car.java

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+package com.lab.dec_24;
+
+public class Car implements Runnable
+{
+
+	private String name;
+	private PetrolPump petrolPump;
+	
+	public Car(String name, PetrolPump petrolPump) 
+	{
+		super();
+		this.name = name;
+		this.petrolPump = petrolPump;
+	}
+
+	@Override
+	public void run() 
+	{
+		petrolPump.refillCar(name);
+	}
+
+}
+/*
+ * 
+Create a Car class that implements the Runnable interface. Include the following members:
+name (String): The name of the car.
+petrolPump (PetrolPump): A reference to the petrol pump.
+run(): Implement the run method from the Runnable interface. 
+Inside this method, 
+call the refillCar method of the petrol pump to simulate the refilling process.
+*/

src/com/lab/dec_24/PetrolPump.java

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+package com.lab.dec_24;
+
+public class PetrolPump 
+{
+
+	public synchronized void refillCar(String carName)
+	{
+		System.out.println(carName+" started refilling...");
+		try 
+		{
+			Thread.sleep(3000);
+		} catch (InterruptedException e) 
+		{
+			e.printStackTrace();
+		}
+		System.out.println(carName+" completed refilling!");
+	}
+}

src/com/lab/dec_24/PetrolPumpSimulation.java

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+package com.lab.dec_24;
+
+public class PetrolPumpSimulation {
+
+	public static void main(String[] args) 
+	{
+		//object creation for PetrolPump  
+		PetrolPump pmp = new PetrolPump();
+		
+		// Creating runnable type of objects to start threads
+		Car bmw = new Car("BMW", pmp);
+		Car rr = new Car("RR", pmp);
+		Car tata = new Car("TaTa", pmp);
+		
+		
+		// New threads created for every car 
+		Thread bmwThread = new Thread(bmw);
+		Thread rrThread = new Thread(rr);
+		Thread tataThread = new Thread(tata);
+		
+		// start method to get threads from NEW to RUNNABLE state
+		bmwThread.start();
+		rrThread.start();
+		tataThread.start();
+
+	}
+
+}
+/*
+ * 
+In the main method, create an instance of PetrolPump.
+Create an array of Car objects, each initialized with a unique name and the reference to the petrol pump.
+Create an array of Thread objects to represent each car's thread.
+Start each car thread and wait for all car threads to complete using the join method.
+*/

src/com/lab/sep_18/CalculationWithThirdVeriavle.java

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+package com.lab.sep_18;
+
+import java.util.Scanner;
+
+public class CalculationWithThirdVeriavle 
+{
+	
+	final static Scanner sc = new Scanner(System.in);
+
+	public static void main(String[] args) 
+	{
+		int a, b, choice; 
+		
+		System.out.println("Enter numbers to calculate ");
+		System.out.print("\t\t 1st Number :");
+		a = sc.nextInt();
+		System.out.print("\t\t 2nd Number :");
+		b = sc.nextInt();
+		
+		System.out.print("\nWhich operation you want to perform\n");
+		System.out.println("1. ADD");
+		System.out.println("2. SUB");
+		System.out.println("3. MUL");
+		System.out.println("4. MOD");
+		System.out.println("5. DIV");
+		System.out.println("YOUR CHOICE :");
+		choice = sc.nextInt();
+		
+		switch (choice) 
+		{
+			case 1: 
+			{
+				add(a, b);
+				break;
+			}
+			case 2: 
+			{
+				sub(a, b);
+				break;
+			}
+			case 3: 
+			{
+				mul(a, b);
+				break;
+			}
+			case 4: 
+			{
+				mod(a, b);
+				break;
+			}
+			case 5: 
+			{
+				div(a, b);
+				break;
+			}
+		default:
+			throw new IllegalArgumentException("Unexpected value: " + choice);
+		}
+		
+
+	}
+	
+	public static void add(int a, int b)
+	{
+		System.out.println(a+b);		
+	}
+	
+	public static void sub(int a, int b)
+	{
+		System.out.println(a-b);
+	}
+	
+	public static void mul(int a, int b)
+	{
+		System.out.println(a*b);
+	}
+	
+	public static void mod(int a, int b)
+	{
+		System.out.println(a%b);
+	}
+	
+	public static void div(int a, int b)
+	{
+		try 
+		{
+			if(b == 0)
+				throw new ArithmeticException("Can not divide by 0");
+			System.out.println(a/b);
+		} catch (ArithmeticException e) 
+		{
+			System.out.println(e.getMessage());
+		}
+		
+	}
+
+}