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  4. Java Singleton Pattern
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Java Singleton Pattern

  • maximshen
     + 1 comment

    IMHO, @dvt32's solution is the best. You can avoid checking "instance == null" and meanwhile create a thread safe Singleton instance during class loading. Alternatively, you can still use lazy initialization thread safe Singleton, using synchronized. Find more from my post

    class Singleton {
    private Singleton() {}
    public String str;
    private static final Singleton instance = new Singleton();
    public static Singleton getSingleInstance() { 
        return instance; 
    }
}