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Category upJava

Core Java

Learn how to use the basic concepts of the Java language by reading the guides below.

  • Definition (64)
  • Java Keyword (21)
  • Java Constructor (20)
  • Reflection (20)
  • >= Java 8 (19)
  • Java Interfaces (18)
  • Java Operators (16)
  • >= Java 11 (16)
  • Exception (15)
  • Java Loops (13)

>> Java Record vs. Lombok

  • popular

>> Type Parameter vs Wildcard in Java Generics

>> Errors and Exceptions in Java

>> How to Serialize a Singleton in Java

>> Uses for Optional in Java

>> Strong, Weak, Soft, and Phantom References in Java

>> Calling JMX MBean Method From a Shell Script

>> Coupling in Java

>> Java Literals

>> Variable Instantiation on Declaration vs. on Constructor in Java

>> Difference Between Class.getResource() and ClassLoader.getResource()

>> Static Fields and Garbage Collection

>> Handle Classes With the Same Name in Java

>> Compare Characters in Java

>> Static vs. Instance Initializer Block in Java

>> Advantages and Disadvantages of Using Java Wildcard Imports

>> Use Cases for Static Methods in Java

>> Is There a Destructor in Java?

>> Check if at Least Two Out of Three Booleans Are True in Java

>> Java “int/char Cannot Be Dereferenced” Error

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