Java Programming [ Lab Programs ]

Aim:

Write a Java program to demonstrate the working of different collection classes. [Use package structure to store multiple classes].

Source Code:

ListExample.java


package collections;

import java.util.ArrayList;

public class ListExample {

    public static void main(String[] args) {

        ArrayList<String> list = new ArrayList<>();

        list.add("Apple");

        list.add("Banana");

        list.add("Orange");

        // to display

        System.out.println("List Example:");

        for (String fruit : list) {

            System.out.println(fruit);

        }

    }

}

SetExample.java


package collections;

import java.util.HashSet;

public class SetExample {

    public static void main(String[] args) {

        HashSet<String> set = new HashSet<>();

        set.add("Apple");

        set.add("Banana");

        set.add("Orange");

        set.add("Apple"); // This won't be added since sets don't allow duplicates

        // To display

        System.out.println("Set Example:");

        for (String fruit : set) {

            System.out.println(fruit);

        }

    }

}

MapExample.java


package collections;

import java.util.HashMap;

public class MapExample {

    public static void main(String[] args) {

        HashMap<Integer, String> map = new HashMap<>();

        map.put(1, "Apple");

        map.put(2, "Banana");

        map.put(3, "Orange");

        // To display

        System.out.println("Map Example:");

        for (Map.Entry<Integer, String> entry : map.entrySet()) {

            System.out.println(entry.getKey() + ": " + entry.getValue());

        }

    }

}

CollectionsDemo.java


package collections;



public class CollectionsDemo {

    public static void main(String[] args) {

        ListExample.main(args);

        SetExample.main(args);

        MapExample.main(args);

    }

}

Output:

Java Programming Lab Programs

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2) Write a Java program to demonstrate the OOP principles. [i.e., Encapsulation, Inheritance, Polymorphism and Abstraction] View Solution

3) Write a Java program to handle checked and unchecked exceptions. Also, demonstrate the usage of custom exceptions in real time scenario. View Solution

4) Write a Java program on Random Access File class to perform different read and write operations. View Solution

5) Write a Java program to demonstrate the working of different collection classes. [Use package structure to store multiple classes]. View Solution

6) Write a program to synchronize the threads acting on the same object. [Consider the example of any reservations like railway, bus, movie ticket booking, etc.] View Solution

7) Write a program to perform CRUD operations on the student table in a database using JDBC. View Solution

8) Write a Java program that works as a simple calculator. Use a grid layout to arrange buttons for the digits and for the +, -,*, % operations. Add a text field to display the result. Handle any possible exceptions like divided by zero. View Solution

9) Write a Java program that handles all mouse events and shows the event name at the center of the window when a mouse event is fired. [Use Adapter classes] View Solution

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