singleton

public class MySingleton {

    private static MySingleton instance;

    private MySingleton() {
    }

    public static MySingleton create() {
        
        if (instance == null) {
            instance = new MySingleton();
        }
        
        return instance;
    }
}


Thread t1 = new Thread();
t.Start(function() -> {
    MySingleton p = MySingleton.create();
});


Thread t2 = new Thread();
t2.Start(function() -> {
    MySingleton p = MySingleton.create();
});