Can we synchronize the constructor of class?

No, a constructor cannot be synchronized in Java. The JVM ensures that only one thread can invoke a constructor call at a given point in time. If we are trying to put a synchronized keyword before a constructor, the compiler says that “error: modifier synchronized not allowed here”.

Which constructor Cannot be used for process Synchronisation?

No, constructor cannot be synchronized. Because constructor is used for instantiating object, when we are in constructor object is under creation. So, until object is not instantiated it does not need any synchronization.

Can a class be synchronized in Java?

Synchronized static methods are synchronized on the class object of the class the synchronized static method belongs to. Since only one class object exists in the Java VM per class, only one thread can execute inside a static synchronized method in the same class.

Can Run method be synchronized in Java?

Can we synchronize a run() method in Java? Yes, we can synchronize a run() method in Java, but it is not required because this method has been executed by a single thread only. It is good practice to synchronize a non-static method of other class because it is invoked by multiple threads at the same time.

Can constructor be overloaded in Java?

In addition to overloading methods, we can also overload constructors in java. Overloaded constructor is called based upon the parameters specified when new is executed.

Does Java provide a default copy constructor?

Like C++, Java also supports copy constructor. But, unlike C++, Java doesn’t create a default copy constructor if you don’t write your own. Following is an example Java program that shows a simple use of copy constructor.

Can constructor be final in Java?

No, a constructor can’t be made final. A final method cannot be overridden by any subclasses. In other words, constructors cannot be inherited in Java therefore, there is no need to write final before constructors. Therefore, java does not allow final keyword before a constructor.

Is list synchronized in Java?

Implementation of ArrayList is not synchronized by default. It means if a thread modifies it structurally and multiple threads access it concurrently, it must be synchronized externally.

Where we can use synchronized keyword in Java?

Synchronized blocks in Java are marked with the synchronized keyword. A synchronized block in Java is synchronized on some object. All synchronized blocks synchronized on the same object can only have one thread executing inside them at a time.

Why synchronized block is better than synchronized method?

synchronized block has better performance as only the critical section is locked but synchronized method has poor performance than block. synchronized block provide granular control over lock but synchronized method lock either on current object represented by this or class level lock.