Example.txt

Single-and-Multiple-Inheritence/BMIMachine.java

@@ -0,0 +1,17 @@
+package com.vivek.javacodes7;
+
+public class BMIMachine extends HeartMonitor
+{
+    public static void main(String[] args)
+    {
+        System.out.println(getMaxHeartRate(30));
+    }
+
+    public static int getMaxHeartRate(int age) 
+    {
+        int result;
+        result = 230-age;
+        System.out.println("___Method executed from Sub-class___");
+        return result;
+    }
+}

Single-and-Multiple-Inheritence/HeartMonitor.java

@@ -0,0 +1,17 @@
+package com.vivek.javacodes7;
+
+public class HeartMonitor 
+{
+    public static void main(String[] args)
+    {
+        System.out.println(getMaxHeartRate(30));
+    }
+
+    public static int getMaxHeartRate(int age) 
+    {
+        int result;
+        result = 220-age;
+        System.out.println("___Method executed from Base-class___");
+        return result;
+    }
+}

Vivek Parmar/Abstraction/Abstraction_1.java

@@ -0,0 +1,18 @@
+package com.vivek.javacodes;
+
+public class Abstraction_1 extends Abstraction_2{
+
+	public void anotherMethod()
+	{
+		System.out.println("Abstract method.");
+	}
+
+	public static void main(String[] args) {
+
+		Abstraction_2 obj = new Abstraction_1();
+		obj.anotherMethod();
+		System.out.println(" ");
+		obj.myMethod();
+	}
+
+}

Vivek Parmar/Abstraction/Abstraction_2.java

@@ -0,0 +1,11 @@
+package com.vivek.javacodes;
+
+abstract class Abstraction_2 {
+
+	public void myMethod() {
+		System.out.println("Abstraction-2.");
+	}
+
+	abstract public void anotherMethod();
+
+}

Vivek Parmar/ArrayDemo.java

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+package com.vivek.javacodes;
+
+public class ArrayDemo {
+
+	public static void main(String[] args) {
+
+		System.out.println("First method: ");
+		int[] numsArray = new int[10];
+		numsArray[0] = 0;
+		numsArray[1] = 1;
+		numsArray[2] = 2;
+		numsArray[3] = 3;
+		numsArray[4] = 4;
+		numsArray[5] = 5;
+		numsArray[6] = 6;
+		numsArray[7] = 7;
+		numsArray[8] = 8;
+		numsArray[9] = 9;
+
+		for(int i = 0; i<numsArray.length; i++) {
+			System.out.println(numsArray[i]);
+		}
+
+		System.out.println();
+
+		System.out.println("Second method: ");
+		char[] charArrays =  {'a','b','c','d','e','f'};
+		System.out.println(charArrays[0]);
+		System.out.println(charArrays[1]);
+		System.out.println(charArrays[2]);
+		System.out.println(charArrays[3]);
+		System.out.println(charArrays[4]);
+		System.out.println(charArrays[5]);
+	}
+
+}

Vivek Parmar/ChainedExceptions.java

@@ -0,0 +1,28 @@
+package com.vivek.javacodes6;
+
+import java.util.InputMismatchException;
+import java.util.Scanner;
+
+public class ChainedExceptions 
+{
+	public static void main(String[] args) 
+	{
+		try
+		{
+			Scanner scanner = new Scanner(System.in);
+
+			System.out.print("Please enter your height in cms: ");
+			float height = scanner.nextFloat();
+
+			double idealWeight = 50 + (0.91 * (height - 152.4));
+			System.out.println("Your ideal weight should be " + idealWeight + "KG.");
+
+			scanner.close();
+		}
+		catch(InputMismatchException e)
+		{
+			throw new NumberFormatException();
+		}
+	}
+
+}

Vivek Parmar/Demo1.java

@@ -0,0 +1,18 @@
+package com.vivek.javacodes3;
+
+public class Demo1 
+{
+	void emp_info(String name, int age)
+	{
+		System.out.println("Type-1:");
+		System.out.println("Name: " + name);
+		System.out.println("Age: " + age);
+	}
+
+	void emp_info(int age, String name)
+	{
+		System.out.println("Type-2:");
+		System.out.println("Name: " + name);
+		System.out.println("Age: " + age);
+	}
+}

Vivek Parmar/Demo2.java

@@ -0,0 +1,14 @@
+package com.vivek.javacodes3;
+
+public class Demo2 extends Demo1
+{
+
+	public static void main(String[] args) 
+	{
+		Demo2 obj = new Demo2();
+		obj.emp_info("Vivek", 22);
+		System.out.println();
+		obj.emp_info(22, "Vivek");
+	}
+
+}

Vivek Parmar/Employee.java

@@ -0,0 +1,32 @@
+package com.vivek.javacodes3;
+
+public class Employee 
+{
+	public static void main(String[] args) 
+	{
+		Employee1 emp1 = new Employee1();
+		emp1.name = "Soham";
+		emp1.age = 22;
+		emp1.salary = 45000.00;
+
+		Employee2 emp2 = new Employee2();
+		emp2.name = "Parsh";
+		emp2.age = 23;
+		emp2.salary = 50000.00;
+		emp2.language = "Java";
+
+		Employee3 emp3 = new Employee3();
+		emp3.name = "Jain";
+		emp3.age = 21;
+		emp3.salary = 55000.00;
+		emp3.language = "C++";
+		emp3.databaseTool = "MySQL";
+
+		emp1.printData();
+		System.out.println();
+		emp2.printData();
+		System.out.println();
+		emp3.printData();
+	}
+
+}

Vivek Parmar/Employee1.java

@@ -0,0 +1,15 @@
+package com.vivek.javacodes3;
+
+public class Employee1
+{
+	String name;
+	int age;
+	double salary;
+
+	public void printData()
+	{
+		System.out.println("Name: " + name);
+		System.out.println("Age: " + age);
+		System.out.println("Salary: " + salary);
+	}
+}

Vivek Parmar/Employee2.java

@@ -0,0 +1,12 @@
+package com.vivek.javacodes3;
+
+public class Employee2 extends Employee1 
+{
+	String language;
+
+	public void printData()
+	{
+		super.printData();
+		System.out.println("Language: " + language);
+	}
+}

Vivek Parmar/Employee3.java

@@ -0,0 +1,12 @@
+package com.vivek.javacodes3;
+
+public class Employee3 extends Employee2
+{
+	String databaseTool;
+
+	public void printData()
+	{
+		super.printData();
+		System.out.println("Database Tool: " + databaseTool);
+	}
+}

Vivek Parmar/Encapsulation-&-Access Specifier/Ex1.java

@@ -0,0 +1,9 @@
+package com.vivek.javacodes5;
+
+public class Ex1 
+{
+	private int a = 100;
+	public int b = 90;
+	protected int c = 80;
+	int d = 19; //no modifier
+}

Vivek Parmar/Encapsulation-&-Access Specifier/Ex2.java

@@ -0,0 +1,14 @@
+package com.vivek.javacodes5;
+
+public class Ex2 extends Ex1
+{
+	public static void main(String[] args)
+	{
+		Ex2 obj = new Ex2();
+//		System.out.println(obj.a); //it will throw an error, because 'a' is private
+		System.out.println("B: " + obj.b);
+		System.out.println("C: " + obj.c);
+		System.out.println("D: " + obj.d);
+	}
+
+}

Vivek Parmar/Ex1.java

@@ -0,0 +1,11 @@
+package com.vivek.javacodes3;
+
+public class Ex1 {
+
+	public int x = 5;
+	public void set_x(int a) 
+	{
+		x=a;
+	}
+
+}

Vivek Parmar/Ex2.java

@@ -0,0 +1,10 @@
+package com.vivek.javacodes3;
+
+public class Ex2 extends Ex1 
+{
+	public int getEx2()
+	{
+		set_x(7);
+		return x;
+	}
+}

Vivek Parmar/Ex3.java

@@ -0,0 +1,13 @@
+package com.vivek.javacodes3;
+
+public class Ex3 extends Ex2 
+{
+	public static void main(String[] args)
+	{
+		Ex1 ex1 = new Ex1();
+		Ex2 ex2 = new Ex2();
+
+		System.out.println(ex1.x);
+		System.out.println(ex2.getEx2());
+	}
+}

Vivek Parmar/Example.txt

@@ -0,0 +1,17 @@
+#File: Ex1.java
+
+class Example1
+{
+	public static void main(String[] args)
+	{
+		System.out.println("Hello Vivek");
+	}
+}
+
+#To compile it via cmd:
+
+javac Ex1.java
+
+#To run it in cmd:
+
+java Example1

Vivek Parmar/ExceptionHandling.java

@@ -0,0 +1,32 @@
+package com.vivek.javacodes6;
+
+import java.util.InputMismatchException;
+import java.util.Scanner;
+
+public class ExceptionHandling 
+{
+	public static void main(String[] args) 
+	{	
+		//Maximum heart beat of the user
+
+		try
+		{
+			System.out.println("___:Maximum Heart Rate Calculator:___");
+			Scanner scanner = new Scanner(System.in);
+
+			System.out.print("Enter your age: ");
+			int age = scanner.nextInt();
+
+			int max_heart_rate = 220 - age;
+
+			System.out.println("Your maximum heart rate is " + max_heart_rate + ".");
+
+			scanner.close();
+		} 
+		catch(InputMismatchException e) 
+		{
+			System.out.println("Please enter age in number format.");
+		}
+	}
+
+}

Vivek Parmar/Interface-&-Abstraction/Bank.java

@@ -0,0 +1,6 @@
+package com.vivek.javacodes4;
+
+public interface Bank 
+{
+	float rateOfInterest();
+}

Vivek Parmar/Interface-&-Abstraction/InterestTest.java

@@ -0,0 +1,14 @@
+package com.vivek.javacodes4;
+
+public class InterestTest 
+{
+	public static void main(String[] args) 
+	{
+		Bank b = new SBI();
+		Bank p = new PNB();
+
+		System.out.println("SBI ROI: " + b.rateOfInterest());
+		System.out.println("PNB ROI: " + p.rateOfInterest());
+	}
+
+}

Vivek Parmar/Interface-&-Abstraction/PNB.java

@@ -0,0 +1,9 @@
+package com.vivek.javacodes4;
+
+public class PNB implements Bank
+{
+	public float rateOfInterest()
+	{
+		return 9.7f;
+	}
+}

Vivek Parmar/Interface-&-Abstraction/Printable.java

@@ -0,0 +1,6 @@
+package com.vivek.javacodes4;
+
+public interface Printable 
+{
+	void print();
+}