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Important Keywords in Java

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  • Difficulty Level : Basic
  • Last Updated : 15 May, 2022
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Keywords refer to the reserved set of words of a language. These are used for some predefined actions.

  1. abstract: It is a non-access modifier applicable for classes and methods. It is used to achieve abstraction. For more, refer to abstract keyword in java
  2. enum: It is used to define enum in Java
  3. instanceof: It is used to know whether the object is an instance of the specified type (class or subclass or interface).
  4. private: It is an access modifier. Anything declared private cannot be seen outside of its class.
  5. protected: If you want to allow an element to be seen outside your current package, but only to classes that subclass your class directly, then declare that element protected.
  6. public: Anything declared public can be accessed from anywhere. For more on Access Modifiers, refer to Access Modifiers in Java 
  7. static: It is used to create a member(block, method, variable, nested classes) that can be used by itself, without reference to a specific instance. For more, refer static keyword in java
  8. strictfp: It is used for restricting floating-point calculations and ensuring the same result on every platform while performing operations in the floating-point variable. For more refer strictfp keyword in Java
  9. synchronized: Applicable for blocks methods. It is used to get synchronization in java. For more, refer to Synchronized in Java
  10. transient: transient is a variables modifier used in serialization. At the time of serialization, if we don’t want to save the value of a particular variable in a file, then we use the transient keyword. For more refer transient keyword in Java
  11. volatile: The volatile modifier tells the compiler that the variable modified by volatile can be changed unexpectedly by other parts of your program. For more, refer to volatile keyword in java
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