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How to write singleton class in java

Singleton class  












public class MySingleton {


private MySingleton(){
System.out.println("Creating new Instance");
}


private static class LazyHolder{
private static final MySingleton INSTANCE=new MySingleton();
}

public static MySingleton getInstance(){
return LazyHolder.INSTANCE;
}

public void printSingleton(){
System.out.println("inside print singleton");
}



}


usage :

MySingleton.getInstance().printSingleton();
MySingleton.getInstance().printSingleton();
MySingleton.getInstance().printSingleton();
MySingleton.getInstance().printSingleton();


you can check yourself the Mysingleton class constructor will invokes only once .
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