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Singleton pattern with java example

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Hilarious Heron answered on February 20, 2020 Popularity 9/10 Helpfulness 2/10

answer Singleton pattern with java example

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related Have you used Singleton design pattern in your Java project?

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Singleton pattern with java example

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public class Singleton {
    // Private static instance variable to hold the single instance
    private static Singleton instance;

    // Private constructor to prevent instantiation from other classes
    private Singleton() {
        // Initialization code, if needed
    }

    // Public static method to get the single instance
    public static Singleton getInstance() {
        if (instance == null) {
            instance = new Singleton();
        }
        return instance;
    }

    // Other methods of the Singleton class
    public void showMessage() {
        System.out.println("Hello, I am a Singleton!");
    }
}

Popularity 9/10 Helpfulness 2/10 Language java

Source: chat.openai.com

Tags: java singleton

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Contributed on Aug 11 2023

Hilarious Heron

0 Answers Avg Quality 2/10

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java singleton implementation

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public class SingletonClass {
    private static final SingletonClass SINGLE_INSTANCE = new SingletonClass();
    private SingletonClass() {}
  public static SingletonClass getInstance() {
      return SINGLE_INSTANCE;
    }
}

Popularity 10/10 Helpfulness 4/10 Language java

Source: dzone.com

Tags: implementation impl

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Contributed on Feb 20 2020

Java Hater

0 Answers Avg Quality 2/10

Have you used Singleton design pattern in your Java project?

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Yes. Singleton is one of the most popular design patterns in

enterprise level Java applications. Almost in every project we see

some implementation of Singleton.

With Singleton pattern we can be sure that there is only one instance

of a class at any time in the application.

This helps in storing properties that have to be used in the

application in a unique location

public class SingletonSerializedTest {

    public static void main(String[] args) throws FileNotFoundException, IOException, ClassNotFoundException {
        SerializedSingleton instanceOne = SerializedSingleton.getInstance();
        ObjectOutput out = new ObjectOutputStream(new FileOutputStream(
                "filename.ser"));
        out.writeObject(instanceOne);
        out.close();

        // deserialize from file to object
        ObjectInput in = new ObjectInputStream(new FileInputStream(
                "filename.ser"));
        SerializedSingleton instanceTwo = (SerializedSingleton) in.readObject();
        in.close();

        System.out.println("instanceOne hashCode="+instanceOne.hashCode());
        System.out.println("instanceTwo hashCode="+instanceTwo.hashCode());

    }

}

https://www.digitalocean.com/community/tutorials/java-singleton-design-pattern-best-practices-examples

Popularity 9/10 Helpfulness 2/10 Language java

Source: Grepper

Tags: java

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Contributed on Feb 10 2023

Pragya Keshap

0 Answers Avg Quality 2/10

Java Singleton pattern

Comment

public class Singleton {
    private static Singleton instance;

    private Singleton() {}

    public static Singleton getInstance() {
        if (instance == null) {
            instance = new Singleton();
        }
        return instance;
    }
}

Popularity 9/10 Helpfulness 2/10 Language java

Source: Grepper

Tags: java singleton

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Contributed on Jul 26 2023

Cabs

0 Answers Avg Quality 2/10

java singleton design pattern

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synchoronized

Popularity 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java singleton

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Contributed on Mar 04 2022

INTAN RAHAYU SUGIANTO

0 Answers Avg Quality 2/10

Singleton pattern with java example

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