Arrays

Find the max element in an array

import java.util.Scanner;

public class FindMaxInArray {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter the number of elements in the array: ");
        int n = scanner.nextInt();

        int[] numbers = new int[n];
        System.out.println("Enter the elements of the array:");
        for (int i = 0; i < n; i++) {
            numbers[i] = scanner.nextInt();
        }
        scanner.close();

        int max = numbers[0];

        for (int i = 1; i < numbers.length; i++) {
            if (numbers[i] > max) {
                max = numbers[i];
            }
        }

        System.out.println("Maximum number in the array: " + max);
    }
}

************************************************************
Reversing an Array

import java.util.Scanner;

public class ReverseArray {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter the number of elements in the array: ");
        int n = scanner.nextInt();

        int[] numbers = new int[n];
        System.out.println("Enter the elements of the array:");
        for (int i = 0; i < n; i++) {
            numbers[i] = scanner.nextInt();
        }
        scanner.close();

        int[] reversed = new int[numbers.length];

        for (int i = 0; i < numbers.length; i++) {
            reversed[i] = numbers[numbers.length - 1 - i];
        }

        System.out.print("Original array: ");
        for (int num : numbers) {
            System.out.print(num + " ");
        }

        System.out.println("\nReversed array: ");
        for (int num : reversed) {
            System.out.print(num + " ");
        }
    }
}

***************************************************
Sorting The array (using bubble sort)

import java.util.Scanner;

public class BubbleSort {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter the number of elements in the array: ");
        int n = scanner.nextInt();

        int[] numbers = new int[n];
        System.out.println("Enter the elements of the array:");
        for (int i = 0; i < n; i++) {
            numbers[i] = scanner.nextInt();
        }
        scanner.close();

        for (int i = 0; i < numbers.length - 1; i++) {
            for (int j = 0; j < numbers.length - i - 1; j++) {
                if (numbers[j] > numbers[j + 1]) {
                    // Swap numbers[j] and numbers[j + 1]
                    int temp = numbers[j];
                    numbers[j] = numbers[j + 1];
                    numbers[j + 1] = temp;
                }
            }
        }

        System.out.println("Sorted array: ");
        for (int num : numbers) {
            System.out.print(num + " ");
        }
    }
}

*****************************************************
Sum and Average of Elements in the array

import java.util.Scanner;

public class ArraySumAverage {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter the number of elements in the array: ");
        int n = scanner.nextInt();

        int[] numbers = new int[n];
        System.out.println("Enter the elements of the array:");
        for (int i = 0; i < n; i++) {
            numbers[i] = scanner.nextInt();
        }
        scanner.close();

        int sum = 0;

        for (int num : numbers) {
            sum += num;
        }

        double average = (double) sum / numbers.length;

        System.out.println("Sum of elements: " + sum);
        System.out.println("Average of elements: " + average);
    }
}

*************************************************
Searching for an element in the array ( Linear Search)

import java.util.Scanner;

public class ArraySearch {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter the number of elements in the array: ");
        int n = scanner.nextInt();

        int[] numbers = new int[n];
        System.out.println("Enter the elements of the array:");
        for (int i = 0; i < n; i++) {
            numbers[i] = scanner.nextInt();
        }
       
        System.out.print("Enter the number to search for: ");
        int target = scanner.nextInt();
        boolean found = false;

        for (int i=0;i<n;i++) {
            if (numbers[i] == target) {
                found = true;
                break;
            }
        }

        if (found) {
            System.out.println("Element " + target + " found at pos"+ i + "in the array.");
        } else {
            System.out.println("Element " + target + " not found in the array.");
        }
    }
}

Comments

Post a Comment

Popular posts from this blog

Introduction to Java Swing

Introduction to Java Swing Java Swing is a part of Java Foundation Classes (JFC) and provides a set of APIs for creating graphical user interfaces (GUIs) in Java. It is built on top of the Abstract Window Toolkit (AWT) and offers a richer set of GUI components. Swing is a platform-independent, lightweight toolkit that can be used to create window-based applications. Key Features of Swing Lightweight Components : Swing components are lightweight because they are written entirely in Java and do not rely on native platform components. Pluggable Look and Feel : Swing supports pluggable look and feel, which means you can change the appearance of your application to match different platforms (e.g., Windows, macOS, Linux) or create a custom look and feel. Component-based Architecture : Swing follows a component-based architecture, allowing for reusable, modular, and easily extendable components. MVC Architecture : Swing components follow the Model-View-Controller (MVC) design pattern, separa...
Read more

KTU OOP LAB JAVA CSL 203 BTech CS S3 - Dr Binu V P

About Me Scheme and Evaluation Syllabus and Practice Questions ******************************** How to do Java Programs in  Debian PART A Basic Java Programs Using Control  Statements 1.String Problems 2.Numerical Problems 3.Arrays 4.Matrix Lab Exercise Java-1 PART B  Object Oriented Programming 1.Creating classes and objects. constructor for initializing object 2.Method overloading in Java 3.Single Inheritance 4.Multilevel Inheritance 5.Method overriding in Java 6. Hierarchical Inheritance 7.Interface in Java 8.Abstract classes in java  PART C Exception and File Handling 1.Exception Handling in Java 2.Reading and Writing Text Files 3.Buffered Reader and String Tokenizer PART D Multi-Threading  Creating Threads in Java Thread Synchronization in Java Thread Priorities in Java Programs using Multi-Threading PART E Graphics and Database Programming Introduction to Java Swing Drawing Shapes Drawing  a Sine Wave Handling Mouse Events Handling Keyboard ...
Read more

JDBC Application Program

Write a program to accept rollno, name, CGPA of “n” students and store the data to a database using JDBC connectivity. Display the list of students having CGPA greater than 7. (Use MySQL /PostgreSQL). Steps: Set up MySQL Database : Ensure MySQL is running and create a database and table. Add MySQL Connector/J : Include the JDBC driver for MySQL in your project. Java Program : Write the Java program to interact with the database. 1. Set up MySQL Database Execute the following SQL commands to create a database and table: CREATE DATABASE studentdb; USE studentdb; CREATE TABLE students (     rollno INT PRIMARY KEY,     name VARCHAR(50),     cgpa FLOAT ); 2. Add MySQL Connector/J Dependency If you are using Gradle, add the following to your build.gradle implementation 'mysql:mysql-connector-java:8.0.33' 3.Java Program import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLExcept...
Read more