Week 4: Programming Assignment 1

Complete the code segment to execute the following program successfully. You should import the correct package(s) and/or class(s) to complete the code.

 
// Import the required package(s) and/or class(es)
import java.lang.String;
import static java.lang.System.*;
import java.util.Scanner;
// main class Question is created
public class Question41{
  public static void main(String[] args) {
	// Scanner object is created
    Scanner scanner = new Scanner(System.in);
     // Read String input using scanner class
    String courseName = scanner.nextLine(); 
     // Print the scanned String
    out.println("Course: " + courseName); 
  }
}

Week 4: Programming Assignment 2

Complete the code segment to print the current year. Your code should compile successfully.

Note: In this program, you are not allowed to use any import statement. Use should use predefined class Calendar defined in java.util package.

 
// The following is the declaration of the main class named Question42
public class Question42 { 
	public static void main(String args[]){
		int year; // integer type variable to store year
		// Create an object of Calendar class. 
java.util.Calendar obj;
	// Use getInstance() method to initialize the Calendar object.
obj=java.util.Calendar.getInstance();
//obj=new java.util.Calendar();
		// Initialize the int variable year with the current year
year=obj.get(obj.YEAR);
// Print the current Year
		System.out.println("Current Year: "+year);
		}  
}

	   
	   

Week 4: Programming Assignment 3

The program in this assignment is attempted to print the following output: 

-----------------OUTPUT-------------------
This is large
This is medium
This is small
This is extra-large
-------------------------------------------------

However, the code is intentionally injected with some bugs. Debug the code to execute the program successfully.

 
interface ExtraLarge{
	String extra = "This is extra-large";
	public void display();
}

class Large {
    public void Print() {
        System.out.println("This is large");
    }
}
 
class Medium extends Large {
    public void Print() {
    	  super.Print();  
        System.out.println("This is medium");
    }
}
class Small extends Medium {
    public void Print() {
        super.Print();  
        System.out.println("This is small");
    }
  }

 
class Question43{
    public static void main(String[] args) {
        Small s = new Small();
        s.Print();
	  Question43 q = new Question43();
	  q.display();
    }
  public void display()
  {
    System.out.print(ExtraLarge.extra);
}
}

Week 4: Programming Assignment 4

Complete the code segment to call the default method in the interface First and Second.

 
interface First{ 
    // default method 
    default void show(){ 
        System.out.println("Default method implementation of First interface."); 
    } 
} 
  
interface Second{ 
    // Default method 
    default void show(){ 
        System.out.println("Default method implementation of Second interface."); 
    } 
} 
  
// Implementation class code 
class Question44 implements First, Second{ 
    // Overriding default show method 
    public void show(){
    // Call show() of First interface.
    First.super.show();
// Call show() of Second interface.
Second.super.show();
} 
  
    public static void main(String args[]){ 
        Question44 q = new Question44(); 
        q.show(); 
    } 
}

Week 4: Programming Assignment 5

Modify the code segment to print the following output.

-----------------OUTPUT-------------------
Circle: This is Shape1
Circle: This is Shape2
-------------------------------------------------

 
// Interface ShapeX is created
interface ShapeX {
 public String base = "This is Shape1";
 public void display1();
}

// Interface ShapeY is created which extends ShapeX
interface ShapeY extends ShapeX {
 public String base = "This is Shape2";
 public void display2();
}

// Class ShapeG is created which implements ShapeY
class ShapeG implements ShapeY {
 public String base = "This is Shape3";
 //Overriding method in ShapeX interface
 public void display1() {
  System.out.println("Circle: " + ShapeX.base);
 }
 // Override method in ShapeY interface
  public void display2()
  {
  System.out.print("Circle: " + ShapeY.base);
}
}
// Main class Question 
public class Question45{
 public static void main(String[] args) {
  //Object of class shapeG is created and display methods are called.
  ShapeG circle = new ShapeG();
  circle.display1();
  circle.display2();
 }
}
	   
	   

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