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  1. Prepare
  2. Java
  3. Advanced
  4. Java Singleton Pattern
  5. Discussions

Java Singleton Pattern

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165 Discussions

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  • praveenaamp14
     + 0 comments
    import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
import java.lang.reflect.*;


class Singleton{
     private static Singleton obj;
     public String str;
     private Singleton()
     {
         
     }
    public static Singleton getSingleInstance()
    {
        if(obj==null)
        {
                    obj=new Singleton();   
        }
        return obj;
    }
}

  • n4m774r_d
     + 0 comments
    class Singleton{
    private static Singleton instance = null;
    private Singleton(){};
    public String str;
    public static Singleton getSingleInstance(){
        if (instance == null){
            instance = new Singleton();
            return instance;
        }
        return instance;
    }
}

  • deadfantasy612
     + 0 comments

    Hmmm... Using Holder pattern to solve this challenge will fail.

  • memmedovaqil202
     + 0 comments

    class Singleton{

    private static Singleton instance;
public String str;

private Singleton() {
}

public static Singleton getSingleInstance() {
    if(instance == null) {
        synchronized(Singleton.class) {
            if(instance == null) {
                instance = new Singleton();
            }
        }
    }
    return instance;
}

    }

  • sandeshmulay223
     + 0 comments

    class Singleton{

    public String str;

private Singleton()
{
}
public static Singleton getSingleInstance()
{
    return new Singleton();
}

    }