Core JAVA | Basic IT Topic

Core JAVA

Multi Threading

August 3, 2019September 6, 2019 basicittopic 0 Comments Multi Threading, Multi Threading in java

Thread is a light-weight process. Process unit is known as thread. When a process is devided into multiple part and

Core JAVA

HashSet and TreeSet in Java

April 21, 2019April 21, 2019 basicittopic 0 Comments HashSet, TreeSet

Both are present in java. util package.Both evaluate on the basis of object values, not on the basis of the

Core JAVA

ArrayList in Java with example

March 23, 2019March 27, 2019 basicittopic 0 Comments

ArrayList in Java ArrayList is a part of Collection framework and it is present in java. util package. It provides

Core JAVA

Stack in Java

February 27, 2019 basicittopic 0 Comments Stack, Stack in java

Stack Stack in Java, The evaluation of stack is always LIFO(last in first out) order. The operation on the stack

Core JAVA

Collection Framework in Java

February 22, 2019February 22, 2019 basicittopic 0 Comments Collection Framework, Collection Framework in Java

Collection Framework In java collection framework is classes and interfaces which are generally used to implement data structure. The collection

Core JAVA

Exception Handling in Java

December 26, 2018 basicittopic 0 Comments catch, Exception Handling, Exception Handling in Java, finally, throw, throws, try

Exception Handling It is a situation in which program terminates abnormally. In Java, an exception is divided into two categories:-

Core JAVA

File in JAVA

September 12, 2018 basicittopic 0 Comments FILE, File in JAVA

File in JAVA The file is a container which stores data permanently Data can be stored in two different ways

Core JAVA

String,String Buffer and String Builder in JAVA

August 7, 2018 basicittopic 0 Comments character array, string, string buffer, String Buffer and String Builder in JAVA, String Buffer and String Builder in JAVA with example, string builder

String, String Buffer and String Builder in JAVA:- String:- String is predefined final class present in the default package. As

Core JAVA

Array in JAVA

August 5, 2018August 7, 2018 basicittopic 0 Comments Array construction, Array Declaration, Array in JAVA, Array initialization, Jagged Array Program, Memory allocation, Multi-Dimensional Array program, Single dimensional array program, Types of array

Array in JAVA:- Array in Java is a collection of similar types of data store in sequential order. It is

Core JAVA

Uses of Super keyword in java

July 31, 2018August 3, 2018 basicittopic 4 Comments super, super keyword, super keyword in java

Working with super keyword:- Super keyword in java which can be used to solve 3 different problems. Super always refers

Core JAVA

Uses Of this keyword in java

July 23, 2018August 3, 2018 basicittopic 0 Comments this, this keyword, this keyword in java

Working with “this” keyword:- This keyword in java is a keyword which always refers to a current class object.T he

Core JAVA

Upcasting and Downcasting in java

July 21, 2018August 3, 2018 basicittopic 6 Comments Downcasting, upcasting, upcasting and downcasting in java

Upcasting and Downcasting:- (Upcasting and Downcasting ) Java support Run-time polymorphism with the help of method overriding. Method overriding only

Core JAVA

Polymorphism in JAVA

July 20, 2018August 3, 2018 basicittopic 0 Comments Constructor Overloading, Method Overloading, Method overriding, Overloading, Polymorphism, Restriction of method overriding:-, Runtime Polymorphism

Polymorphism in Java:- Polymorphism in Java is an object-oriented concept which is used to create different from a single resource.

Core JAVA

What is interface in JAVA ?

July 16, 2018August 3, 2018 basicittopic 0 Comments

Interface in JAVA:- An interface in Java is very similar to an abstract class. Both cannot be instantiated. It

Core JAVA

Inheritance in java

July 14, 2018August 3, 2018 basicittopic 0 Comments Hierarchical inheritance, Hybrid inheritance, inheritance, Multilevel inheritance, Multiple inheritance, Single inheritance

Inheritance Access the resources of the .class file after establish the relation is the concept of inheritance in java. Inheritance

Core JAVA

What is aggregation ?

July 14, 2018August 3, 2018 basicittopic 0 Comments aggregation, aggregation in java, java aggregation

Aggregation An aggregation is a special form of association. Access the resources of another .class file without creating any relation,

Core JAVA

Control Structure in JAVA

July 12, 2018August 3, 2018 basicittopic 0 Comments Conditional control Structure, Continue, Control Structure, Control Structure in JAVA, Do…..while loop, For each loop, For loop, Ifelse Statement Example, Jump control structure, Loop control Structure, Multiple If Example, Nested If Example, Return, Selection control structure, Sequential control Structure, While loop

Control Structure in JAVA:- A control structure is a block of a program that analyzes the direction of the program

Core JAVA

What is Input from keyboard in java ?

July 7, 2018August 3, 2018 basicittopic 0 Comments By using buffer reader., By using command line argument, By using console class., By using data input stream reader., By using scanner class, Input from keyboard

Input from the keyboard:- Followings are the techniques through which we can take input from keyboard. By using scanner class.

Core JAVA

What is Block in JAVA…?

July 7, 2018August 3, 2018 basicittopic 1 Comment block, block in java, java block, non static block, static block

BLOCK IN JAVA:- A block in Java is a group of one or more statements enclosed in braces.A block start

Core JAVA

What is private constructor ,Factory method and Singleton class in JAVA ?

July 5, 2018August 3, 2018 basicittopic 0 Comments factory method, private constructor, singleton class

Factory Method:- If the return type of method is class name then it is known as the Factory method. Private

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