gs gs111 Class Components (Using Java) - Data Members - Quiz No.1

 class Books { abstract int price; Books(int p) { this.price = p; } public void getPrice() { System.out.println("Price: "+this.price); } } public class AbstractDataMembers { public static void main(String[] args) { Books b = new Books(20); b.getPrice(); } } 

 import java.io.*; class TransientVariables implements Serializable { int num1 = 20; transient int num2 = 30; public static void main(String[] args) throws Exception { TransientVariables t = new TransientVariables(); FileOutputStream fo = new FileOutputStream("input.txt"); ObjectOutputStream oo = new ObjectOutputStream(fo); oo.writeObject(t); FileInputStream fi = new FileInputStream("input.txt"); ObjectInputStream oi = new ObjectInputStream(fi); TransientVariables t1 = (TransientVariables) oi.readObject(); System.out.println("num1: " + t1.num1); System.out.println("num2: " + t1.num2); } } 

 //Create a directory/folder named p1, and save a Java file(Vehicle.java) package p1; public class Vehicle { protected int color; protected int speed = 10; } //Create another directory named p2, and save a Java file(ProtectedVariables.java) and make sure that two packages should be under the same root directory. //another program package p2; import p1.Vehicle; //import package p1 public class ProtectedVariables extends Vehicle { public static void main(String[] args) { ProtectedVariables p = new ProtectedVariables(); System.out.println("Speed: "+p.speed); } } 

 class Book { String title; String author; Book(String t) { this.title = t; } } public class InstanceMembers { public static void main(String[] args) { Book b = new Book("Java Programming"); System.out.println("Book Title: "+Book.title); } } 

 class Employee { int salary = 1000000; static float experience = 4.5f; } public class StaticDatamembers { public static void main(String[] args) { Employee e = new Employee(); System.out.println(e.experience); System.out.println(Employee.experience); } } 

 class Student { protected String name = "Java"; } class ProtectedVariables { public static void main(String[] args) { Student s = new Student(); System.out.println(s.name); } } 

 class Area { int side; public int squareArea() { int a = this.side * this.side; return a; } } public class InstanceVariables { public static void main(String[] args) { Area a = new Area(); System.out.println("Area: "+a.squareArea()); } } 

 class Distance { int time; static int speed = 10; static { int d = speed * time; } } public class StaticVariables { public static void main(String[] args) { Distance d = new Distance(); System.out.println("Speed: "+d.speed); System.out.println("Time: "+d.time); } } 

 class Interest { int principal = 1000; int time = 2; static int rate = 3; static { Interest i = new Interest(); int interest = (i.principal * i.time * rate)/100; System.out.println("Simple Interest: "+interest); } } public class StaticMembers { public static void main(String[] args) { Interest i = new Interest(); } } 

 import java.io.*; class TransientAndFinal implements Serializable { int num1 = 50; transient final int num2 = 100; public static void main(String[] args) throws Exception { TransientAndFinal t = new TransientAndFinal(); FileOutputStream fo = new FileOutputStream("input.txt"); ObjectOutputStream oo = new ObjectOutputStream(fo); oo.writeObject(t); FileInputStream fi = new FileInputStream("input.txt"); ObjectInputStream oi = new ObjectInputStream(fi); TransientAndFinal t1 = (TransientAndFinal) oi.readObject(); System.out.println("num1: " + t1.num1); System.out.println("num2: " + t1.num2); } }