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Java / volatile

Is reading a long/double variable is atomic?

long/double are 64-bit wide and it is read first 32 bit and next other 32 bits, so it is non-atomic.

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volatile keyword. Difference between synchronized and volatile: Can an array be marked as volatile in Java? Does volatile make non-atomic operation to atomic? Is reading a long/double variable is atomic? Does long/double volatile variable is atomic? Practical uses of volatile modifier. What guarantee volatile variable provides? (OR) The Java volatile Happens-Before Guarantee volatile example. Can a primitive variable be volatile in Java? Main difference between locking and volatile variables. How compiler and runtime treats a volatile variable? Can a volatile variable be marked as final?

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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 Local Variables 6 Class Variables (Static Variables) 13 Instance Variables (Non Static Variables) 3 Package 10 Operators 9 Data types 10 Methods 38 Modifiers 29 Control Statements 12 Access Modifiers 5 Constructor 38 Interface 46 Abstract Class 19 Enum 20 Arrays 11 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 25 JavaFX 6 Autosys 9 The Java Virtual Machine: How and What Is It Used For?

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