Object Questions

⦿How to Properly Copy an Object in Java Without Reference Issues?

Learn how to create a copy of an object in Java to avoid reference sharing issues. Stepbystep guide with examples and common mistakes.

⦿How to Transfer an Object Between Activities in Android

Learn how to pass a custom object between activities in Android using Parcelable. Stepbystep guide with code examples.

⦿Can You Instantiate an Abstract Class in Java?

Discover whether you can instantiate an abstract class in Java with examples and explanations to clarify common misconceptions.

⦿How to Properly Print Java Objects Instead of Default Memory References

Learn how to print Java objects and collections meaningfully rather than their default memory references. Improve your Java skills with clear examples.

⦿How to Convert a Java Serializable Object to a Byte Array for Transmission

Learn how to serialize a Java object to a byte array and transmit it over sockets with a detailed example and common pitfalls.

⦿How Does the ArrayList's contains() Method Evaluate Object Equality?

Explore how the contains method in ArrayList determines object equality and how to implement a correct equals method in Java.

⦿How to Convert Java Objects to JSON Using Jackson

Learn how to convert Java objects to JSON format using Jackson with stepbystep instructions and code examples.

⦿How to Cast an Object to an Integer in Java

Learn how to safely cast an Object type to an Integer in Java with examples and common pitfalls.

⦿Understanding the Differences Between Boolean and boolean in Java

Explore the key differences between Boolean and boolean in Java including default values and best practices for usage.

⦿How to Make ArrayList.toArray() Return a Custom Type Instead of Object[]?

Learn how to return a Custom from ArrayList.toArray in Java ensuring type safety and avoiding Object conversion.

⦿Understanding the Difference Between Class.forName() and Class.forName().newInstance() in Java

Explore the differences between Class.forName and Class.forName.newInstance in Java including usage implications and examples.

⦿How Does the String Class Overload the + Operator in Java?

Explore how the String class overrides the operator in Java and understand its implications on objectoriented programming without violating principles.

⦿How to Obtain the Java Object Reference When toString() and hashCode() Are Overridden?

Learn how to obtain the object reference in Java when toString and hashCode methods are overridden particularly in multithreaded applications.

⦿How to Synchronize a Static Variable Across Multiple Thread Instances in Java?

Learn how to synchronize a static variable among threads for different instances of a class in Java with practical examples and best practices.

⦿How Do Default .equals() and .hashCode() Work in Custom Java Classes?

Explore how default .equals and .hashCode methods function in Java for custom classes without overrides alongside examples and common pitfalls.

⦿How to Instantiate a Class by Name in Java?

Learn how to instantiate a class using its name as a string in Java including examples and potential pitfalls.

⦿Understanding the Purpose of Serialization in Java

Learn the key benefits of serialization in Java including data persistence object transmission and more. Discover its uses and best practices.

⦿Understanding the Differences Between Classes, Objects, and Instances in Java

Discover key differences between classes objects and instances in Java including definitions examples and common errors to avoid.

⦿Why does gson.toJson() throw a StackOverflowError and how can I fix it?

Learn why Gsons toJson method may throw a StackOverflowError. Explore its causes and solutions with examples and common mistakes.

⦿How to Compare Two Objects in Java Using .equals() and == Operator?

Learn how to effectively compare two Java objects using the .equals method and operator with detailed examples and common pitfalls.

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