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Lesson Posted on 11 Oct IT Courses/Java Tuition/BCA Tuition/Java Programming IT Courses/Java/Core Java +2 Tuition/BA Tuition/Programming in JAVA Tuition/Engineering Diploma Tuition/Advanced Java Programming less

Java 8 Predicates

Shiva Kumar

I have completed Engineering in computer science in 2008. Since then,I have been working in IT industry...

In the previous lession, we have learnt how to use filters and collectors. In filter we have passed the condition to evaluate whether the object is eligible to be filtered or not. Code given below for reference and highlighted in bold. public class NowJava8 { public static void main(String args)... read more

In the previous lession, we have learnt how to use filters and collectors. In filter we have passed the condition to evaluate whether the object is eligible to be filtered or not. Code given below for reference and highlighted in bold.

public class NowJava8 {

public static void main(String[] args) {

List lines = Arrays.asList("abc", "xyz", "shiva");

List result = lines.stream() 
.filter(line -> !"shiva".equals(line)) 
.collect(Collectors.toList()); 

result.forEach(System.out::println); //output : abc,xyz

}

}

Now, what if I would like to same condition in different places to filter on different collections. We would end up repleating same piece of code.
What does it mean? we break DRY (Do not repeat yourself).

Here to solve this we can use predicates. Example given below.
 import java.util.Arrays;
import java.util.List;
import java.util.function.Predicate;
import java.util.stream.Collectors;

public class PredicatesExample
{
public static Predicate<String> isShiva() {
return s -> s.equalsIgnoreCase("shiva");
}


public static void main(String[] args) {
List<String> lines = Arrays.asList("abc", "xyz", "shiva");

List<String> result = lines.stream()
.filter(isShiva().negate())
.collect(Collectors.toList());

result.forEach(System.out::println); //output : abc,xyz
 
List<String> names = Arrays.asList("abc", "dhdh", "shiva","ddds","edsd");
 
 result =names.stream() 
.filter(isShiva().negate())
.collect(Collectors.toList()); 

result.forEach(System.out::println); //output : abc,dhdh,ddds,edsd
}
}  

As you see, we have used same predicate for two different collections.
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Answered on 08 Nov Tuition/Engineering Diploma Tuition/Electrical Engineering Diploma

I am EEE 5th sem student.I want to complete my industrial training for 6 months.How can I proceed?

Shyamundar

Electrical Engineering subjects and Mathematics is in easy way

Go to Indo-German tool room Hyderabad or you can contact them through website. All the details are given there. For an Electrical Engineers it is better to do 6 months details course about electrical software like PS-CAD, E-TAP, MATLAB, Image Processing, Machine Learning etc. You will get better... read more

Go to Indo-German  tool room Hyderabad or you can contact them through website.  All the details are given there.  For an Electrical Engineers it is better to do 6 months details course about electrical software like PS-CAD,  E-TAP,  MATLAB,  Image Processing,  Machine Learning  etc.  You will get better opportunites from there regarding this.  

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Answered on 31 Jul Tuition/Engineering Diploma Tuition/Regular Classes

I am 2nd year diploma student in mechanical engineering. Should I go classes for spoken English and what... read more

I am 2nd year diploma student in mechanical engineering. Should I go classes for spoken English and what should be the essentials topic for me to learn.I am really well in catching the English meanings

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Sakshi D.

I would suggest you start reading story books in English ,and use a dictionary while you do so, to look for meanings of unknown words. Note them down if possible. Also watch english movies and series this will also help you. But please do not hamper your studies in doing the above. All the best! read more

I would suggest you start reading story books in English ,and use a dictionary while you do so, to look for meanings of unknown words. Note them down if possible.

Also watch english movies and series this will also help you.

But please do not hamper your studies in doing the above.

All the best!

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Answered on 21 Jul Tuition/Engineering Diploma Tuition/Regular Classes

Gopinath B

Certified Onlie Tutor

You better maintain at an average of 400/hr with small variations.
Answers 4 Comments 2
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Lesson Posted on 12 Jul IT Courses/Java/JSP (Java Server Pages) IT Courses/Java/Servlet IT Courses/Java/JSP +8 IT Courses/XML Webservices IT Courses/Eclipse Tuition CBSE Tuition/BCA Tuition Tuition/BCA Tuition/Java Programming Tuition/Engineering Diploma Tuition/Advanced Java Programming IT Courses/Java/Core Java less

Mastering in Java Programming

Rajeev Majumdar

I can teach every topic very easily and make it stronger for the students. Teaching with practical examples .

Core java topics What is Java?Execution Model Of JavaBytecodeHow to Get Java?A First Java ProgramCompiling and Interpreting ApplicationsThe JDK Directory StructureUsing Eclipse Data types and Variables What are the data types?Primitive Datatypes & DeclarationsVariables & TypesNumeric &... read more

Core java topics  

What is Java?
Execution Model Of Java
Bytecode
How to Get Java?
A First Java ProgramCompiling and Interpreting Applications
The JDK Directory Structure
Using Eclipse

Data types and Variables

What are the data types?
Primitive Datatypes & Declarations
Variables & Types
Numeric & Character Literals
String formatting and Parsing
String Literals
Arrays,
Non-Primitive Datatypes
Casting & Type Casting
Widening & Narrowing Conversions
The Dot Operator

Methods

What are Methods?
Method Structure
Declaration Of Methods
Calling Of Methods
Defining Methods
Method Parameters
Scope
Why static methods?

Operators and Expressions

Expressions
Assignment Operator
Arithmetic Operators
Relational Operators
Logical Operators
Increment and Decrement OperatorsOperate-Assign Operators (+=, etc.)
The Conditional Operator
Operator Precedence
The Cast Operator

Control Flow Statements

What are Control Flow Statements?Conditional (if) Statements
Adding an else if
Conditional (switch) Statements

while and do-while Loops

for Loop
Enhanced for Loop
The continue Statement
The break Statement

Object-Oriented Programming

Concept & Syntax Of Class
Concept & Syntax Of Methods
Fields and MethodsConstructors & Destructors
Encapsulation
Access Specifiers
Access Control

Objects and Classes

Defining a Class
Creating an Object
Accessing Class
MembersInstance Data and Class DataDefining Methods
Constructors
Access Modifiers

Using Java Objects

StringBuilder and StringBuffer
Methods and MessagesParameter PassingComparing and Identifying Objects

Inheritance & Polymorphism

Inheritance in Java
Why use Inheritance?
Types Of InheritanceSingle Inheritance Multi-level Inheritance
Hierarchical Inheritance
Hybrid Inheritance
Method Overloading
Run-time Polymorphism
Method Overriding
Polymorphism in Java
Types Of Polymorphism
super keyword
The Object Class & Methods

Java Files and I/O

What is a Stream
Reading and Writing to Files (only txt files)Input and Output Stream
Manipulating input data
Reading Lines
Opening & Closing Streams
Predefined Streams
File handling Classes & Methods
Using Reader & Writer classes

Interfaces and Abstract Classes

What is an Interface
Defining Interfaces
Separating Interface and Implementation
Implementing and Extending Interfaces
Abstract Classes

Packages

What is a Package?
Advantages of using a Package
Types Of Packages
Naming Conventions
Steps For Creating Packages
The import Statement
Static Imports
CLASSPATH and Import
Defining Packages
Package Scope

Exception Handling

Exceptions Overview
Exception Keywords
Catching Exceptions
The finally Block
Exception Methods
Declaring Exceptions
Defining and Throwing Exceptions
Errors and Runtime Exceptions
Assertions

Collection Framework

The Collections Framework
The Set Interface
Set Interface
The List Interface
The Map Interfaces


Primitive wrapper classes

Inner Classes

Nested Classes
Anonymous Inner Classes
Local Nested Classes
Static Nested Classes
Member Classes

Threads

Non-Threaded Applications
Introduction to Threads
Threaded Applications
Creating threads
Lifecycle Of A Thread
Phases of Thread life cycle
Runnable Interface
Priority Of Threads
Coordinating Threads
Thread Interruption
Thread Groups

Swing

Introduction To Swing
Swing Features
Heirarchy Of Java Swing Classes
Swing GUI Components
Packages Used In Swing
Swing Control Classes & Methods
Using Swing API
Swing API MVC Architecture
AWT v/s Swing
Event Handling In Swing
Event Listener Interfaces

JDBC

Introduction To JDBC
JDBC Architecture
Types Of JDBC Drivers & Differences
Common JDBC Components
Importing Packages
Registering JDBC Drivers
Opening Connection
Connecting a Java program to a Database
Executing Query
Statement Class & Objects
Getting Information from Database
Obtaining Result Set Information
DML Operations through JDBC
Cleaning up Environment

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Answered on 04 Jul Tuition/Engineering Diploma Tuition

Sudheer

Tutor

You may respond to some free enquiries,but taking premium would definitely help you to get responded to more valuable enquiries
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Answered on 12 Jun Tuition/Engineering Diploma Tuition/Embedded System Tuition/BTech Tuition/Embedded System Design IT Courses/Embedded C

Depends on no of seats being left.

Ganesh

Trainer

Pls reach out to me , if you need some help on Emvedded systems
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Lesson Posted on 19 Apr IT Courses/Embedded Systems Tuition/Engineering Diploma Tuition/Embedded System

Basic Electronics Part 1- Simple and Easy Steps to Learn Basic Electronics

Vijeendra

What is Electricity Everything is made of atoms There are 118 elements; an atom is a single part of a component. An atom consists of electrons, protons, and neutrons Electrons (- charge) are attracted to protons (+ charge), this holds the atom together. Some materials have a strong attraction... read more

What is Electricity

Everything is made of atoms

  • There are 118 elements; an atom is a single part of a component.
  • An atom consists of electrons, protons, and neutrons
  • Electrons (- charge) are attracted to protons (+ charge), this holds the atom together.
  • Some materials have a strong attraction and refuse to lose electrons; these are called insulators (air, glass, rubber, most plastics)
  • Some elements have weak attractions and allow electrons to be lost; these are called conductors (copper, silver, gold, aluminium)
  • Electrons can be made to move from one atom to another; this is called a current of electricity.
  • The surplus of electrons is called a negative charge (-). A shortage of electrons is called a positive charge (+).
  • A battery provides a surplus of electrons by chemical reaction.
  • By connecting a conductor from the positive terminal to negative terminal electrons will flow.
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Answered on 01/06/2016 Tuition/Engineering Diploma Tuition

RAJESH N.

Home Tutor

Equivalent
Answers 10 Comments
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