Author Archives: Stanislav_Panteleev

In Java, a constructor is a special method used to initialize objects. Java supports three common types of constructors: Default Constructor (No arguments) Parameterized Constructor (Accepts arguments) Copy Constructor (Creates a new object by copying another object) 1. Default Constructor … Continue reading →

What is a Default Constructor in Java? A default constructor is a constructor with no parameters that initializes an object with default values. If a class does not define any constructor, Java automatically provides a default constructor. 1. Characteristics of … Continue reading →

1. Key Characteristics of a Constructor ✅ Same name as the class✅ No return type (not even void)✅ Called automatically when an object is instantiated✅ Used to initialize instance variables✅ Can be overloaded (multiple constructors in the same class)

Short Answer: not all objects need exposed cloning, so to support this behaviour method clone is removed to Object class with throwing CloneNotSupportedException if you need clone in your object just override it you can add Clonable to message everyone … Continue reading →

The best cloning method depends on your use case. Below is a comparison of three common cloning methods: Shallow Copy using super.clone() (Default Cloning) Deep Copy using super.clone() + Manual Cloning Copy Constructor (Alternative Approach)

2. Shallow Copy Issue (Mutable Fields) Shallow copying fails when an object contains references to other objects.

Object cloning in Java is the process of creating an exact copy of an existing object. It is used when you need a duplicate object without manually copying all attributes.

code Step-by-Step Execution Thread 1 (waitForSignal()) starts first Prints “Waiting…”. Calls wait(), which releases the lock on resource and goes into waiting state. Thread 2 (sendSignal()) starts after 1 second Calls sendSignal(), acquires the lock, and calls notify(), which wakes … Continue reading →

The Object class is the root class of all Java classes. Every class in Java implicitly inherits from Object, either directly or indirectly. 📌 Key Facts About Object Class: It is part of the java.lang package. It provides basic methods … Continue reading →

In Java, all three—String, StringBuffer, and StringBuilder—are used to handle text, but they have key differences in terms of mutability, performance, and thread safety.