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Unicode requires 16 bits ASCII require 7 bits. but it is usually represented as 8 bits. UTF-8 represents characters using 8, 16, and 18 bit patterns. UTF-16 uses 16-bit and larger bit patterns. Define reflection Reflection allows program related access to information about the fields, methods and constructors of loaded classes It use reflected fields, … Read more

Delegation is an alternative to inheritance. Delegation denotes that you include an instance of any class as an instance variable, and forward messages to the instance. It is safer than inheritance because it ceases you to think about forwarded message , because the instance is of a known class, rather than a new class, and … Read more

// Sort Collections.sort(list); // Sort case-insensitive Collections.sort(list, String.CASE_INSENSITIVE_ORDER); // SortReverse-order Collections.sort(list, Collections.reverseOrder ()); // Reverse-order sort case-insensitive Define local, member and a class variable. Within a method variables declared are called “local” variables. Variables declared in the class i.e not in any methods are “member” variables (global variables). Variables declared in the class i.e not … Read more

  In order to assign a superclass object in a variable to a subclass,one needs to do explicit casting. For example:Person person=null; Man man = (Man)person; An automatic casting takes place when we typecast a object in subclass as parent class object. Define Externalizable. Externalizable is coined as an Interface It extends the Serializable Interface. … Read more

Yes,an inner class may be built an Interface. public interface xyz { static int p=0; void m(); class c { c() { int q; System.out.println(“inside”); } public static void main(String c[]) { System.out.println(“inside “); } }; }   In Java, as of my last knowledge update in January 2022, an inner class can be defined … Read more