Equals() method is defined in Object class in Java and used for checking equality of two objects defined by business logic.
“==” or equality operator in Java is a binary operator provided by Java programming language and used to compare primitives and objects. public boolean equals(Object o) is the method provided by the Object class. The default implementation uses == operator to compare two objects. For example: method can be overridden like String class. equals() method is used to compare the values of two objects.
|Memory||Stack memory is used only by one thread of execution.||Heap memory is used by all the parts of the application.|
|Access||Stack memory can’t be accessed by other threads.||Objects stored in the heap are globally accessible.|
|Memory Management||Follows LIFO manner to free memory.||Memory management is based on the generation associated with each object.|
|Lifetime||Exists until the end of execution of the thread.||Heap memory lives from the start till the end of application execution.|
|Usage||Stack memory only contains local primitive and reference variables to objects in heap space.||Whenever an object is created, it’s always stored in the Heap space.|
The Java ClassLoader is a subset of JVM (Java Virtual Machine) that is responsible for loading the class files. Whenever a Java program is executed it is first loaded by the classloader. Java provides three built-in classloaders: