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Java / Instance Variables (Non Static Variables)

1. Define Instance variables. 2. How the object references are initialized when it is a instance variable? 3. Is Instance variables thread safe in Java?

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Define Instance variables.

Posted on Apr 1, 2016 by Senthil Kumar.

Instance variables are variables that are defined at the class level. Instance variables need not have to be initialized since they are automatically initialized to its default value during object creation.

How the object references are initialized when it is a instance variable?

Object references are initialized to null in case of instance variables.

Is Instance variables thread safe in Java?

No.

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Class Variables (Static Variables)

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OOPS Concepts and its implementation in Java 18 Inheritance 29 JDK, JRE, JVM, JIT 69 Java Identifiers 4 Object, Class and Package 44 Variable 9 Instance Variables (Non Static Variables) 3 Class Variables (Static Variables) 13 Local Variables 6 Package 10 Operators 9 Modifiers 29 Methods 38 Data types 10 Control Statements 13 Access Modifiers 5 Constructor 38 Interface 46 Abstract Class 19 Enum 20 Arrays 20 Strings 32 Using String 29 Exception 55 Collections 56 List and its implementations 22 Map and its implementations 36 Set and its implementations 23 Queue and its implementations 4 Regular expressions 3 Design Patterns 75 Generics 20 Casting 5 volatile 13 Java ThreadLocal 10 Java Multithreading 113 Java Multithreading part II 17 final keyword 13 static keyword 16 Concurrent collections 55 Java Serialization 36 JDBC 53 JNDI 17 RMI 6 JAXB 10 JMX 9 log4j 18 Annotations 10 XML 14 Garbage collection 31 Programs 8 JVM 4 Java8 streams 31 JavaFX 6 Autosys 9 The Java Virtual Machine: How and What Is It Used For? Java 11 9 Java 12 4 Top Errors You Should Avoid when Studying Programming

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