Category Archives: Java Basic Programs

Java Basic Programs

Java Program to print Words in Sentence

In this tutorial, we will learn to create a Java Program to print Words in Sentence using java programming.

Prerequisites

Before starting with this tutorial, we assume that you are best aware of the following Java programming concepts:

Java Operators.
Basic Input and Output function in Java.
Class and Object in Java.
Basic Java programming.
If-else statements in Java.
For loop in Java.
in-built functions.

Words in Sentence

with the help of string’s split() function breaks the given string around matches cases with given regular expression.

Example: we take a string as shown below and then break sentence in to word using split function

string s = “hello to Java Programming”.

Output:
hello
to
java
Programming

Java Program to print Words in Sentence

In this program, we will break sentence into word using if-else and for a loop. We would first declare and initialized the required variables. Next, we will break sentence into words. Let’s have a look at the code.

// Java program to print words of a strings

class Sentance_word {
	public static void Words(String s)
	{
// break String into all possible words using split() function
		for (String word : s.split(" "))
			if (word.length() % 2 == 0)
				System.out.println(word);
	}
	public static void main(String[] args)
	{
		String s = "hello to java Programming".
		Words(s);
	}
}

// Java program to print words of a strings

class Sentance_word {

public static void Words(String s)

{

// break String into all possible words using split() function

for (String word : s.split(" "))

if (word.length() % 2 == 0)

System.out.println(word);

}

public static void main(String[] args)

{

String s = "hello to java Programming".

Words(s);

}

<strong>Approach:</strong>

Take a string in variable s
Now split the string into words with the help of split() function in String class. here”  “(space) is delimiter to break the sentence into word. As a result, the words of the string are split and returned as a string array.
for (String word : s.split(" ")) if (word.length() % 2 == 0) System.out.println(word);

Approach:

Take a string in variable s

Now split the string into words with the help of split() function in String class. here” “(space) is delimiter to break the sentence into word. As a result, the words of the string are split and returned as a string array.

for (String word : s.split(" ")) if (word.length() % 2 == 0) System.out.println(word);

Output

In the above program, we have first declared and initialized a set variables required in the program.

s= it will hold string.

After declaring variables we initiate values in an array[]

After splitting the sentence into word with regular expression, this method returns a charters of arrays and finally we will print words.

Java Program to Reverse Sentence

In this tutorial, we will learn to create a Java program that will reverse a String in Java programming.

Prerequisites

Before starting with this tutorial, we assume that you are the best aware of the following Java programming topics:

Operators in Java Programming.
Usage of Conditional statements in Java Programming.
Basic Input and Output function in Java Programming.
Basic Java programming.
For loop in Java Programming.

What is reversing a sentence?

A sentence is a collection of words, numbers, and symbols. The sentence can be any string of the English Language. Reversing a sentence means writing the sentence in reverse order, from last to first.

Algorithm:-

1. Declaring the variables for the program.

2. Taking the input sentence from the user.

3. Sending that statement to the for loop for reversal.

4. Passing that reversed sentence to the user.

5. Printing the result sentence.

6. End the program.

1. Declaring the variables for the program.

2. Taking the input sentence from the user.

3. Sending that statement to the for loop for reversal.

4. Passing that reversed sentence to the user.

5. Printing the result sentence.

6. End the program.

Program Description for Reversing the sentence:-

In this program, We will first take the input sentence for the program in string format. Then we will call the reverse function to reverse the sentence in the program. Storing the reversed sentence in a variable. Printing the reversed Sentence to the user.

With the help of the below, code, we will reverse the sentence.

Program Code:-

import java.util.*;//Importing the packages in the program.
public class Reverse {

  public static void main(String[] args) {
    //Declaring the required variables for the program
    String sent = "Let us work";//Giving the sentence to a variable
    //Calling the reversed function to reverse the sentence
    String reversed = reverse(sent);
    
    //Printing the reversed sentence to the user.
    System.out.println("The reversed sentence is: " + reversed);
  }
  //User defined function to reverse a sentence.
  public static String reverse(String sent) {
    if (sent.isEmpty())
      return sent;
    //Returning the sentence
    return reverse(sent.substring(1)) + sent.charAt(0);
  }
}

import java.util.*;//Importing the packages in the program.

public class Reverse {

public static void main(String[] args) {

//Declaring the required variables for the program

String sent = "Let us work";//Giving the sentence to a variable

//Calling the reversed function to reverse the sentence

String reversed = reverse(sent);

//Printing the reversed sentence to the user.

System.out.println("The reversed sentence is: " + reversed);

}

//User defined function to reverse a sentence.

public static String reverse(String sent) {

if (sent.isEmpty())

return sent;

//Returning the sentence

return reverse(sent.substring(1)) + sent.charAt(0);

}

Output:-

In the above program, we have first initialized the required variable.

sent = string type variable that will hold the value of the input sentence.
reversed = it will hold the integer value of a reversed sentence.

A user-defined function to reverse a string.

Calling the reverse function in the program.

Printing the reversed sentence to the user.

Java Program to Check if a word is present in sentence

Java Program to Check if a word is present in the sentence

In this tutorial, we will learn to create a Java program that will Check if a word is present in a sentence in Java programming

Prerequisites

Before starting with this tutorial, we assume that you are the best aware of the following Java programming topics:

Operators in Java Programming.
Basic Input and Output function in Java Programming.
Basic Java programming.
For loop in Java programming.
Conditional Statements in Java programming.

What is a string?

As we all know, the String is a collection of characters and words. The word is a collection of alphabets. For string, only one variable is declared which can store multiple values. The String can consist of all the type able data, it means Digits, Alphabets, Symbols, etc.

Algorithm:-

1. Declaring the variables for the program.

2. Taking the input string from the user.

3. Taking the input word from the user that needs to be searched.

4. Passing those variables to for loop.

5. Using conditional statements for the program to find the word occurrence of in that sentence.

6. Printing the result position.

7. End the program.

1. Declaring the variables for the program.

2. Taking the input string from the user.

3. Taking the input word from the user that needs to be searched.

4. Passing those variables to for loop.

5. Using conditional statements for the program to find the word occurrence of in that sentence.

6. Printing the result position.

7. End the program.

Check if a word is present in the sentence

In this program, first, we will declare the input string in the program. Then we will declare the word to be searched in the sentence. Then will find the occurrence of that word in that string. Printing the result if that string is present in the sentence or not.

Let us take the example program from the below code to search for the occurrence of that word.

Program:-

import java.util.*;//Importing the util package in the program.
class Main {
  //Main function body:-
  public static void main(String[] args) {
     //Declaring the svariables for the program.
    // creating a string for the program.
    String txt = "This is the test stentence for the w3adda program";
    String str1 = "is";
    String str2 = "for";
    System.out.println(" Default string =" + txt);
    System.out.println(" Searching the  'for' in  sentence ");
    System.out.println(" Searching the  'is' in  sentence ");
    // check if str1 is present in txt
    // using indexOf()
    int result = txt.indexOf(str1);
    if(result == -1) {
      System.out.println(str1 + " not is present in the string.");
    }
    else {
      System.out.println(str1 + " is present in the string.");
    }

    // check if str2 is present in txt
    // using indexOf()
    result = txt.indexOf(str2);
    if(result == -1) {
    //printing the ouput string to the user.
      System.out.println(str2 + " is not present in the string.");
    }
    else {
      System.out.println(str2 + " is present in the string.");
    }
  }
}

import java.util.*;//Importing the util package in the program.

class Main {

//Main function body:-

public static void main(String[] args) {

//Declaring the svariables for the program.

// creating a string for the program.

String txt = "This is the test stentence for the w3adda program";

String str1 = "is";

String str2 = "for";

System.out.println(" Default string =" + txt);

System.out.println(" Searching the 'for' in sentence ");

System.out.println(" Searching the 'is' in sentence ");

// check if str1 is present in txt

// using indexOf()

int result = txt.indexOf(str1);

if(result == -1) {

System.out.println(str1 + " not is present in the string.");

}

else {

System.out.println(str1 + " is present in the string.");

}

// check if str2 is present in txt

// using indexOf()

result = txt.indexOf(str2);

if(result == -1) {

//printing the ouput string to the user.

System.out.println(str2 + " is not present in the string.");

}

else {

System.out.println(str2 + " is present in the string.");

}

Output:-

In the above program, we have first initialized the required variable.

txt = It will hold the string value.
str1 = It will hold the string value.

Searching the first string in the sentence using a conditional statement.

Searching the second word in the Sentence.

Printing output words are present in the sentence or not.

Java program to count number of words in sentence

Java program to count the number of words in a sentence

In this tutorial, we will learn to create a Java program that will count the number of words in a sentence in Java programming

Prerequisites

Before starting with this tutorial, we assume that you are the best aware of the following Java programming topics:

Operators in Java Programming.
Basic Input and Output function in Java Programming.
Basic Java programming.
For loop in Java programming.
Conditional Statements in Java programming.

What is a Sentence?

As we all know, a sentence is a collection of characters and words. The word is a collection of alphabets. For string, only one variable is declared which can store multiple values. The String can consist of all the typeable data, it means Digits, Alphabets, Symbols, etc.

Algorithm:-

1. Declaring the variables for the program.

2. Taking the input string from the user.

3. Passing those variables to for loop.

5. Using conditional statements for the program to find all the word occurrence of in that sentence.

6. Printing the result.

7. End the program.

1. Declaring the variables for the program.

2. Taking the input string from the user.

3. Passing those variables to for loop.

5. Using conditional statements for the program to find all the word occurrence of in that sentence.

6. Printing the result.

7. End the program.

Count the number of words in a sentence

Let us take the example program from the below code to search for the occurrence of that word.

Program:-

import java.util.*;//Importing the util package in the program.
public class WordCounting {  
    
      static int wordcount(String string)  
        {  
          //Using a counter variable 
          int count=0;  
        //Counting the words in the sentence.
            char ch[]= new char[string.length()];     
            for(int i=0;i<string.length();i++)  
            {  
                ch[i]= string.charAt(i);  
                if( ((i>0)&&(ch[i]!=' ')&&(ch[i-1]==' ')) || ((ch[0]!=' ')&&(i==0)) )  
                    count++;  
            }  
            //Printing the output number of words 
            return count;  
        }  
      public static void main(String[] args) {  
          //declaring the required variable for the program.
          String string =" W3adda is a good place to learn";  
          
         //Printing the ouput number of words.
         System.out.println(wordcount(string) + " words.");   
    }  
}

import java.util.*;//Importing the util package in the program.

public class WordCounting {

static int wordcount(String string)

{

//Using a counter variable

int count=0;

//Counting the words in the sentence.

char ch[]= new char[string.length()];

for(int i=0;i<string.length();i++)

{

ch[i]= string.charAt(i);

if( ((i>0)&&(ch[i]!=' ')&&(ch[i-1]==' ')) || ((ch[0]!=' ')&&(i==0)) )

count++;

}

//Printing the output number of words

return count;

}

public static void main(String[] args) {

//declaring the required variable for the program.

String string =" W3adda is a good place to learn";

//Printing the ouput number of words.

System.out.println(wordcount(string) + " words.");

}

Output:-

In the above program, we have first initialized the required variable.

txt = It will hold the string value.
str1 = It will hold the string value.

Count the words in the sentence using a conditional statement.

Logic code of the user-defined functions

Printing output number of words in the sentence.

Square Number Series Program in Java

In this tutorial, we will learn to create a Square Number Series Program in Java using java programming.

Prerequisites

Before starting with this tutorial, we assume that you are best aware of the following Java programming concepts:

Java Operators.
Basic Input and Output function in Java.
Class and Object in Java.
Basic Java programming.
If-else statements in Java.
For loop in Java.

Square of a number ?

Square a number is when we simply multiply number by itself.

Example: “Square of 2” = 2 ×2 = 4

Square Number Series Program in Java

In this program we will square of number till the size of N using for loop. We would first declared and initialized the required variables. Next, we will find square of numbers .Lets have a look at the code.

//java program to find square of number...
import java.util.Scanner;
import java.util.*;
public class Square_Series {
    public static void main(String[] args) 
    {
      //declaring variables and taking values from user..
        int number, sqr = 0;
        Scanner s = new Scanner(System.in);
      //taking input form user..
        System.out.print("Enter value of n:");
        number = s.nextInt();
        for(int i = 1; i <= number; i++)
        {
        //finding square of number till n
            sqr =  i * i;
       //printing result.
        System.out.println(" Square of series till number :"+sqr);
        }
    }
}

//java program to find square of number...

import java.util.Scanner;

import java.util.*;

public class Square_Series {

public static void main(String[] args)

{

//declaring variables and taking values from user..

int number, sqr = 0;

Scanner s = new Scanner(System.in);

//taking input form user..

System.out.print("Enter value of n:");

number = s.nextInt();

for(int i = 1; i <= number; i++)

{

//finding square of number till n

sqr = i * i;

//printing result.

System.out.println(" Square of series till number :"+sqr);

}

Output

In the above program, we have first declared and initialized a set variables required in the program.

number= it will hold given number.
i = for iteration
sqr = it will hold square of values.

After declaring variables we initiate values taking value from user.

User entered a number till the number we looped using for loop and within the loop we will find square of numbers.

as you can loop will till number and within the loop we will find squares of number

Now we use for loop to get the desired output as shown in image.

And finally we print the result that is square of number till the number inputted by user.

Odd Number Series Program in Java

In this tutorial, we will learn to create a Java program that will Print Odd Number Series using Java programming.

Prerequisites

Before starting with this tutorial, we assume that you are the best aware of the following Java programming topics:

Operators in Java Programming.
Basic Input and Output function in Java Programming.
Basic Java programming.
While loop in Java programming.
Conditional Statements in Java programming.
Arithmetic operations in Java Programming.

What is an Odd number?

A number is said to be an Odd number when that number is divided by two into two equal whole numbers. And there should be a remainder of zero when it is being divided by 2.

Program to Print Odd Numbers from 1 to N.

In this program, we will first take the input point from the user. Then we will find the Odd numbers up to that range. At last, we will print that series of Odd numbers up to that number.

With the help of this program, we can print a series of Odd numbers up to N number.

Algorithm:-

1. Declaring the variables for the program.

2. Taking the input number for the series from the user.

3. Filtering the odd numbers.

4. Printing the odd number series.

5. End the program.

1. Declaring the variables for the program.

2. Taking the input number for the series from the user.

3. Filtering the odd numbers.

4. Printing the odd number series.

5. End the program.

Program to Print Odd Numbers series:-

// Java Program to Print Odd Numbers from 1 to N using For loop
import java.util.Scanner;//importing the util package in the program

public class OddNumbers1 {
    //Main program body 
	private static Scanner sc;
	public static void main(String[] args) 
	{
	    //Declaring therequired variables for the program.
		int no, i;
		sc = new Scanner(System.in);
		
		//Taking the input end number.
		System.out.print(" Please Enter any Number : ");
		no = sc.nextInt();	
		//Generating the odd series from the code.
		for(i = 1; i <= no; i++)
		{
			if(i % 2 != 0)
			{
			    //Printing the output series of the odd numbers.
				System.out.print(i +"\t"); 
			}
		}	
	}
}

// Java Program to Print Odd Numbers from 1 to N using For loop

import java.util.Scanner;//importing the util package in the program

public class OddNumbers1 {

//Main program body

private static Scanner sc;

public static void main(String[] args)

{

//Declaring therequired variables for the program.

int no, i;

sc = new Scanner(System.in);

//Taking the input end number.

System.out.print(" Please Enter any Number : ");

no = sc.nextInt();

//Generating the odd series from the code.

for(i = 1; i <= no; i++)

{

if(i % 2 != 0)

{

//Printing the output series of the odd numbers.

System.out.print(i +"\t");

}

Output:-

In the above program, we have first initialized the required variable.

no = it will hold the integer value of the input.
i = it will hold the integer value for the loop.

Input message for the user to take an endpoint of the series.

Program Logic Code to generate the series of odd numbers.

Printing output odd digits

Even Number Series Program in Java

In this tutorial, we will learn to create a Java program that will Print Even Number Series using Java programming.

Prerequisites

Before starting with this tutorial, we assume that you are the best aware of the following C programming topics:

Operators in Java Programming.
Basic Input and Output function in Java Programming.
Basic Java programming.
For loop in Java programming.
Conditional Statements in Java programming.
Arithmetic operations in Java Programming.

What is an Even number?

A number is said to be an Even number when that number is divided by two into two equal whole numbers. And there should be a remainder of zero when it is being divided by 2.

Program to Print Even Numbers from 1 to N.

In this program, we will first take the input point from the user. Then we will find the Even numbers up to that range. At last, we will print that series of Even numbers up to that number.

With the help of this program, we can print a series of Even numbers up to N number.

Algorithm:-

1. Declaring the variables for the program.

2. Taking the input number for the series from the user.

3. Filtering the Even numbers.

4. Printing the Even number series.

5. End the program.

1. Declaring the variables for the program.

2. Taking the input number for the series from the user.

3. Filtering the Even numbers.

4. Printing the Even number series.

5. End the program.

Program to Print Even Numbers series:-

// Java Program to Print Even  Numbers from 1 to N using For loop
import java.util.Scanner;//importing the util package in the program

public class EvenNumbers1 {
    //Main program body 
	private static Scanner sc;
	public static void main(String[] args) 
	{
	    //Declaring the required variables for the program.
		int no, i;
		sc = new Scanner(System.in);
		
		//Taking the input end number.
		System.out.print(" Please Enter any Number : ");
		no = sc.nextInt();	
		//Generating the Even series from the code.
		for(i = 0; i <= no; i++)
		{
			if(i % 2 == 0)
			{
			    //Printing the output series of the Even numbers.
				System.out.print(i +"\t"); 
			}
		}	
	}
}

// Java Program to Print Even Numbers from 1 to N using For loop

import java.util.Scanner;//importing the util package in the program

public class EvenNumbers1 {

//Main program body

private static Scanner sc;

public static void main(String[] args)

{

//Declaring the required variables for the program.

int no, i;

sc = new Scanner(System.in);

//Taking the input end number.

System.out.print(" Please Enter any Number : ");

no = sc.nextInt();

//Generating the Even series from the code.

for(i = 0; i <= no; i++)

{

if(i % 2 == 0)

{

//Printing the output series of the Even numbers.

System.out.print(i +"\t");

}

Output:-

In the above program, we have first initialized the required variable.

no = it will hold the integer value of the input.
i = it will hold the integer value for the loop.

Input message for the user to take an endpoint of the series.

Program Logic Code to generate the series of Even numbers.

Printing output Even digits

Java Program to Print Name Of Month

In this tutorial, we will learn to create a Java program that will Print Name Of Month using Java programming.

Prerequisites

Before starting with this tutorial, we assume that you are the best aware of the following Java programming topics:

Operators in Java Programming.
Basic Input and Output function in Java Programming.
Basic Java programming.
Conditional Statements in Java programming.
Arithmetic operations in Java Programming.

Algorithm:-

1. Declaring the required variables for the program.

2. Taking the input <strong>Month </strong>from the user.

3. Using the conditional statements to find the name of the <strong>Month</strong>.

4. Printing the <strong>Month </strong>Name in a Year.

5. End the Program.

1. Declaring the required variables for the program.

2. Taking the input Month from the user.

3. Using the conditional statements to find the name of the Month.

4. Printing the Month Name in a Year.

5. End the Program.

Find the Month Name of a year:-

In today’s program, we will take the input month in a range between 1 to 12 from the user. Then we will pass that variable to the conditional statements to find the name of the Month. At last, we will print the resulting name of the Month to the user.

With the help of the below program, we can find the name of the Month in a year.

Program Code:-

import java.util.Scanner;//Importing the packages in the program.

public class MonthOfyear {
    
    public static void main(String[] args) {
        //Declaring the required variables for the program.
        int mth;
        Scanner scanner = new Scanner(System.in);
        //Taking the input month number from the user.
        System.out.println("Enter Month number (1-12) : ");
        mth = scanner.nextInt();
        
        //Finding the Month of the year.
        if(mth == 1) {
            //Printing the Month of the year 
            System.out.println("January");

        } else if(mth == 2) {
            //Printing the Month of the year 
            System.out.println("February");

        } else if(mth == 3) {
            //Printing the Month of the year 
            System.out.println("March");

        } else if(mth == 4) {
            //Printing the Month of the year 
            System.out.println("April");

        } else if(mth == 5) {
            //Printing the Month of the year 
            System.out.println("May");

        } else if(mth == 6) {
            //Printing the Month of the year 
            System.out.println("june");

        } else if(mth == 7) {
            //Printing the Month of the year 
            System.out.println("July");

        } else if(mth == 8) {
            //Printing the Month of the year 
            System.out.println("August");

        } else if(mth == 9) {
            //Printing the Month of the year 
            System.out.println("September");

        } else if(mth == 10) {
            //Printing the Month of the year 
            System.out.println("October");

        } else if(mth == 11) {
            //Printing the Month of the year 
            System.out.println("November");

        } else if(mth == 12) {
            //Printing the Month of the year 
            System.out.println("December");

        } else {
            //Printing the message to enter month number between 1-12
            System.out.println("Please enter month number between 1-12.");
        }

    }
}

import java.util.Scanner;//Importing the packages in the program.

public class MonthOfyear {

public static void main(String[] args) {

//Declaring the required variables for the program.

int mth;

Scanner scanner = new Scanner(System.in);

//Taking the input month number from the user.

System.out.println("Enter Month number (1-12) : ");

mth = scanner.nextInt();

//Finding the Month of the year.

if(mth == 1) {