Java Training

training_abs_ConcreteClass.java

package com.sap.training.abs;

public class ConcreteClass extends AbstractClass{

    @Override
    public void printName() {
        System.out.println("printName: Concrete class");
    }
}

abstract class AbstractClass {
    private String name;

    public abstract void printName();
}

training_Basic_1.java

package com.sap.training;

public class Basic_1 {

    public static void main(String[] args) {
        System.out.println("Hello");
    }
}

training_Basic_2.java

package com.sap.training; // package

public class Basic_2 {
    public static String appName = "my basic app"; // class variable
    /**
     * this is a multi-line comment
     */
    public static void main(String[] args) {
        Integer a = 10;
        // this is a line comment
        int calc = calc(a);
        System.out.println(calc);
        stringManipulations();
    }
    public static int calc(int a) {
        return ++a;
    }
    public static void stringManipulations() {
        String message = "hello world";
        System.out.println(message.length());
        System.out.println(message.substring(1, 3));
        String[] s = message.split(" ");
        for (String temp : s) {
            System.out.println(temp);
        }
    }
}

training_BasicArray.java

package com.sap.training;

public class BasicArray {

    public static void main(String[] args) {

        int[] scores;
        char[] letters, symbols;
        String[] countries;

        scores = new int[3];

        scores[0] = 11;
        scores[1] = 21;
        scores[2] = 31;

        sumScores(scores);
    }

    static void sumScores(int[] n){
        int sum = 0;
        for (int i:n){
            sum += i;
        }
        System.out.println(sum);
    }
}

training_Car.java

package com.sap.training;

public class Car {

    private long price;
    private int years;

    public Car(long price, int years) {
        this.price = price;
        this.years = years;
    }

    public long getPrice() {
        return price;
    }

    public int getYears() {
        return years;
    }

    public void setPrice(long price) {
        this.price = price;
    }

    public void setYears(int years) {
        this.years = years;
    }

    @Override
    public String toString() {
        return "Car{" +
                "price=" + price +
                ", years=" + years +
                '}';
    }
}

training_CarApp.java

package com.sap.training;

public class CarApp {

    public static void main(String[] args) {
        Car car = new Car(12000, 1);

        System.out.println("Car age: " + car.getYears() + "\nCar price: " + car.getPrice());

        final int value = 10;
    }
}

training_fnl_Car.java

package com.sap.training.fnl;

public class Car extends ParentOfFinalClassDemo{

    private final Engine engine = new Engine();

    public static void main(String[] args) {

    }

}

final class Engine {
    int property = 10;

    public int getProperty() {
        return property;
    }

    public void setProperty(int property) {
        this.property = property;
    }
}

class ParentOfFinalClassDemo {
    public void printSomething() {
        System.out.println("Hello world");
    }
}

training_Inheritance_Bike.java

package com.sap.training.Inheritance;

public class Bike extends Vehicle{

    private  Stand stand;

    public Stand getStand() {
        return stand;
    }

    public void setStand(Stand stand) {
        this.stand = stand;
    }

    public static void main(String[] args) {
        Stand stand = new Stand();

        new Bike().sound();
    }

    @Override
    public void sound() {
        super.sound();
        System.out.println("Bike making sound");
    }
}

class Stand {
    @Override
    public String toString() {
        return "This is a generic stand";
    }
}

training_Inheritance_Bus.java

package com.sap.training.Inheritance;

public class Bus {

    int doors;

    public int getDoors() {
        return doors;
    }

    public void setDoors(int doors) {
        this.doors = doors;
    }
}

training_Inheritance_Vehicle.java

package com.sap.training.Inheritance;

public class Vehicle {
    private long speed;
    private long mileage;
    private long wheels;

    public void setSpeed(long speed) {
        this.speed = speed;
    }

    public void setMileage(long mileage) {
        this.mileage = mileage;
    }

    public void setWheels(long wheels) {
        this.wheels = wheels;
    }

    public long getSpeed() {
        return speed;
    }

    public long getMileage() {
        return mileage;
    }

    public long getWheels() {
        return wheels;
    }

    public void sound() {
        System.out.println("Vehicle making sound");
    }
}

training_Practice_Enum.java

package com.sap.training;

public class Practice_Enum {

    enum level {
        low, medium, high;

        @Override
        public String toString() {
            return super.toString() + " Override";
        }

        level() {
            System.out.println("Called: " + toString());
        }
    }

    public static void main(String[] args) {
        level val = level.high;
        System.out.println(val);

        level[] newArr = level.values();
        for (level temp:newArr) {
            System.out.println(temp);
        }
    }
}