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Java Programming Exercises With Solutions (PDF)

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Java programming (CSC1016S)

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University of Cape Town

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Index

Q .no. Questions Page no. Remark

1 Write a program that implement the concept of Encapsulation. 03-

2 Write a program to demonstrate the concept of function overloading of

Polymorphism.

05-

3 Write a program to demonstrate concept of construction overloading of

Polymorphism. 07-

4 Write a program the use Boolean data type and print the prime number

series up to 50. 09

5 Write a program to print first 10 number of the following Series using

Do-while Loops 0,1,1,2,3,5,8,11.. 10

6 Write a program to check the given number is Armstrong or not 11-

7 Write a program to find the factorial of any given number. 13

8 Write a program to sort the element of One Dimensional Array in

Ascending order 14

9 Write a program for matrix multiplication using input/output Stream. 15-

10 Write a program for matrix addition using input/output Stream. 17-

11 Write a program for matrix transpose using input/output stream class. 19-

12 Write a program to add the element of Vectors as arguments of main

method(Run time ) and rearrange them, and copy it into an array.

21-

13 Write a program to check that the given String is palindrome or not. 23-

14 Write a program to arrange the String in alphabetical order. 25-

15 Write a program for StringBuffer class which perform the all methods

of that class.

27-

16 Write a program to calculate Simple interest using the Wrapper class. 29

17 Write a program to calculate Area of various geometrical figures using

the abstract class. 30-

18 Write a program where Single class implements more than one

interfaces and with help of interface reference variable user call the

methods.

32-

19 WAP that use the multiple catch statements within the try-catch

mechanism. 34

20 WAP where user will create a self- Exception using the “throw”

keyword. 35

21 Write a program for multithread using is Alive(), join() and

synchronized() methods of thread class 36-

22 Write a program to create a package using command and one package

will import another package.

38-

23 Write a program for JDBC to insert the values into the existing table by

using prepared statement.

40-

24 WAP for JDBC to display the records from the existing table. 42-

25 WAP for demonstrate of switch statement ,continue and break. 44-

Q1) Write a program that implement the concept of Encapsulation.

Ans :-

// Java program to demonstrate encapsulation

class Encapsulate {

// private variables declared

// these can only be accessed by public methods of class

private String Name;

private int Roll;

private int Age;

// get methods for age, name and roll

//to access private variables

public int getAge() { return Age; }

public String getName() { return Name; }

public int getRoll() { return Roll; }

// set methods for age, name and roll

//to access private variable Age

public void setAge(int newAge) { Age = newAge; }

public void setName(String newName) { Name = newName; }

public void setRoll(int newRoll) { Roll = newRoll; }

}

public class TestEncapsulation {

public static void main(String[] args)

{ Encapsulate obj = new Encapsulate();

// setting values of the variables

obj("manish");

obj(21);

obj(5527);

// Displaying values of the variables

System.out("Student's name: " +

obj());

System.out("Student's age: " + obj());

System.out("Student's roll: " +

obj());

// Direct access of Roll is not possible

// due to encapsulation

// System.out("Student's roll: " + obj);

}

Output :-

Q2) Write a program to demonstrate the concept of function overloading

of Polymorphism.

Ans :-

// Java program to demonstrate concept of function overloading of

Polymorphism

class Adder{

//Method Overloading: changing no. of arguments

static int add(int a,int b){return a+b;}

static int add(int a,int b,int c){return a+b+c;}

//Method Overloading: changing data type of arguments

static double add(double a, double b){return a+b;}

static String add(String a, String b)

{String str = "Four"; return str; }

//Method Overloading: Sequence of data type of arguments

static void disp(String c, int num)

{System.out(c +" "+ num);}

static void disp(int num, String c)

{System.out(num +" "+ c);}

}

class TestOverloading{

public static void main(String[] args){

//Method Overloading: changing no. of arguments

System.out(Adder(11,11));

System.out(Adder(11,11,11));

//Method Overloading: changing data type of arguments

System.out(Adder(12,12));

System.out(Adder("One","Three"));

//Method Overloading: Sequence of data type of arguments

Adder("manish",5527);

Adder(9399,"hello");

}

Output:

Output:-

Q4) Write a program the use Boolean data type and print the prime

number series up to 50.

Ans :-

// Java program to print the prime number series up to 50

public class PrimeNumber

{

public static void main(String []args)

{

int num=50,i;

System.out("\n Prime numbers upto 50 :\n");

for(i=2;i<=num;i++)

{

boolean a=true;

for(int j=2;j<=i-1;j++)

{

if(i%j==0)

{ a=false;

break;

}

if(a==true)

{ System.out(" "+i);

}

System.out();

}

Output:-

Q6) Write a program to check the given number is Armstrong or not.

Ans :-

// Java program to find Nth Armstrong Number

import java.util;

public class Armstrong

{

public static void main(String []args)

{ int n,sum=0,count=0;

Scanner input= new Scanner(System);

System.out("\nEnter a number to check Armstrong or

not : ");

int number =input();

int num=number;

// Find total digits in num

while(num!=0)

{ num=num/10;

count++;

}

//Copy the value for number in num

num=number;

// Calculate sum of power of digits

while (num != 0)

{ n=num%10;

sum=sum+(int)Math(n,count);

num=num/10;

}

if (number == sum )

System.out("\n"+number + " is an Armstrong

number ");

else

System.out("\n"+number + " is not an

Armstrong number ");

}

Output:-

Q8) Write a program to sort the element of One Dimensional Array in

Ascending order

Ans :-

// Java Program to Sort Array of Integers using Arrays() Method

import java.util;

public class ArraySort{

public static void main(String args[]){

int []arr = new int[7];

Scanner enter = new Scanner(System);

System.out("\nPlease! Enter 7 numbers to perform

sorting:");

for(int i=0; i<arr; i++)

{

arr[i]=enter();

}

// Applying sort() method over to above array

// by passing the array as an argument

Arrays(arr);

System.out("\nSorting in Ascending order :\n");

for(int i=0;i<arr;i++)

{

System.out(" "+arr[i]);

}

System.out( );

}

Output:-

Q9) Write a program for matrix multiplication using input/output Stream.

Ans :-

// Java Program for matrix multiplication using input/output Stream

import java.util;

public class MatrixMultiplication{

public static void main(String []args)

{

Scanner input=new Scanner(System);

System.out("Enter number of rows : ");

int r=input();

System.out("Enter number of columns : ");

int c=input();

if(r!=c)

{

System.out("\nSorry! matrix multiplication cannot

be performed..!");

System(0);

}

else

{ int m1[][]=new int[r][c];

int m2[][]=new int[r][c];

int m3[][]=new int[r][c];

int sum;

System.out("Enter the elements of First

matrix row wise: ");

for(int i=0;i<r;i++)

{

for(int j=0;j<c;j++)

{ m1[i][j]=input();

}

System.out("Enter the elements of second

matrix row wise: ");

for(int i=0;i<r;i++)

{

for(int j=0;j<c;j++)

{ m2[i][j]=input();

}

for(int i=0;i<r;i++)

{

Q10) Write a program for matrix addition using input/output Stream.

Ans :-

// Java Program for matrix addition using input/output Stream

import java.util;

public class MatrixAddition{

public static void main(String []args)

{

Scanner input=new Scanner(System);

System.out("Enter number of rows : ");

int r=input();

System.out("Enter number of columns : ");

int c=input();

int m1[][]=new int[r][c];

int m2[][]=new int[r][c];

int m3[][]=new int[r][c];

System.out("Enter the elements of First matrix

row wise:");

for(int i=0;i<r;i++)

{ for(int j=0;j<c;j++)

{

m1[i][j]=input();

}

System.out("Enter the elements of second matrix

row wise:");

for(int i=0;i<r;i++)

{ for(int j=0;j<c;j++)

{

m2[i][j]=input();

}

for(int i=0;i<r;i++)

{ for(int j=0;j<c;j++)

{

m3[i][j]=m1[i][j]+m2[i][j];

}

System.out("Sum of two matrices : ");

for(int i=0;i<r;i++)

{ for(int j=0;j<c;j++)

{

System.out(" " +m3[i][j]);

}

System.out();

}

input();

}

Output: -

Output:-

Q12) Write a program to add the element of Vectors as arguments of main

method(Run time ) and rearrange them, and copy it into an array.

Ans :-

// Java Program to Demonstrate Working of Vector via Creating and

Using It

// Importing required classes

import java.*;

class VectorExample{

public static void main(String[] args)

{ // Size of the Vector

int n = 5;

Scanner input = new Scanner(System);

// Declaring the Vector with initial size n

Vector<Integer> list = new Vector<Integer>(n);

// Appending new elements at the end of the vector

try{ for(int i=0;i<5;i++)

list(Integer(args[i]));

// Printing elements of list

System.out("\n"+list);

// Remove element at index 3

list(3);

//Displaying the vector after deletion

System.out(list);

// iterating over vector elements usign for loop

System.out("Printing the list using list() --

---");

for (int i = 0; i<list(); i++)

// Printing elements one by one

System.out(" "+list(i));

// Creating the array and using toArray()

Object[] arr = list();

System.out("\nPrinting the list using Array() ---

--");

for (int i = 0; i<arr; i++)

System.out(" "+arr[i]);

System.out();

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Java Programming Exercises With Solutions (PDF)

Course: Java programming (CSC1016S)

174 Documents

Students shared 174 documents in this course

University: University of Cape Town

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Index

Q .no. Questions Page no. Remark

1Write a program that implement the concept of Encapsulation. 03-04

2Write a program to demonstrate the concept of function overloading of

Polymorphism. 05-06

3Write a program to demonstrate concept of construction overloading of

Polymorphism. 07-08

4Write a program the use Boolean data type and print the prime number

series up to 50. 09

5Write a program to print first 10 number of the following Series using

Do-while Loops 0,1,1,2,3,5,8,11.. 10

6Write a program to check the given number is Armstrong or not 11-12

7Write a program to find the factorial of any given number. 13

8Write a program to sort the element of One Dimensional Array in

Ascending order 14

9Write a program for matrix multiplication using input/output Stream. 15-16

10 Write a program for matrix addition using input/output Stream. 17-18

11 Write a program for matrix transpose using input/output stream class. 19-20

12 Write a program to add the element of Vectors as arguments of main

method(Run time ) and rearrange them, and copy it into an array. 21-22

13 Write a program to check that the given String is palindrome or not. 23-24

14 Write a program to arrange the String in alphabetical order. 25-26

15 Write a program for StringBuffer class which perform the all methods

of that class. 27-28

16 Write a program to calculate Simple interest using the Wrapper class. 29

17 Write a program to calculate Area of various geometrical figures using

the abstract class. 30-31

Write a program where Single class implements more than one

interfaces and with help of interface reference variable user call the

methods.

32-33

19 WAP that use the multiple catch statements within the try-catch

mechanism. 34

20 WAP where user will create a self- Exception using the “throw”

keyword. 35

21 Write a program for multithread using is Alive(), join() and

synchronized() methods of thread class 36-37

22 Write a program to create a package using command and one package

will import another package. 38-39

23 Write a program for JDBC to insert the values into the existing table by

using prepared statement. 40-41

24 WAP for JDBC to display the records from the existing table. 42-43

25 WAP for demonstrate of switch statement ,continue and break. 44-45