Java keywords and their meanings

Key words	Meaning
Abstract	Indicates that the class or Member method has an abstract property
Assert	Used for program debugging
Boolean	One of the basic data types, Boolean type
Break	Jump out of a block early
Byte	One of the basic data types, byte type
Case	In a switch statement, one of the branches of the surface
Catch	Used in exception handling to catch exceptions
Char	One of the basic data types, character types
Class	Class
Const	Reserved keywords, no specific meaning
Continue	Back to the beginning of a block
Default	Default, for example, in a switch statement, indicating that a default branch
Do	Used in the DO-WHILE loop structure
Double	One of the basic data types, double-precision floating-point number types
Else	Used in a conditional statement to indicate a branch when the condition is not true
Enum	Enumeration
Extend	Indicates that one type is a subtype of another type, where the common types have classes and interfaces
Final	Used to describe the final attribute, indicating that a class cannot derive a subclass, or that a member method cannot be overridden, or that the value of a member field cannot be changed
Finally	Used to handle exception cases, to declare a block of statements that are essentially bound to be executed
Float	One of the basic data types, single-precision floating-point number types
For	A guide word for a cyclic structure
Goto	Reserved keywords, no specific meaning
If	Guide Words for conditional statements
Implements	Indicates that a class implements the given interface
Import	Indicates that you want to access the specified class or package
instanceof	Used to test whether an object is an instance object of a specified type
Int	One of the basic data types, integer type
Interface	Interface
Long	One of the basic data types, long integer type
Native	Used to declare a method that is implemented by a computer-related language (such as the C/c++/fortran language)
New	Used to create a new instance object
Package	Package
Private	An access control method: Private mode
Protected	An access control method: Protection mode
Public	An access control method: Common mode
Return	Returning data from member methods
Short	One of the basic data types, the short integer type
Static	Indicates a static property
Strictfp	Used to declare fp_strict (single-precision or double-precision floating-point number) expressions that follow the IEEE 754 arithmetic specification
Super	Indicates a reference to the parent type of the current object or a constructor for the parent type
Switch	Guide words for Branching statement structures
Sychronized	Indicates that a piece of code needs to be executed synchronously
This	Reference to the current instance object
Throw	Throws an exception
Throws	Declares all exceptions that need to be thrown in the currently defined member method
Transient	Declaring a member domain without serialization
Try	Try a block that might throw an exception
void	Declares that the current member method does not return a value
Volatile	Indicates that two or more variables must be changed in a synchronized manner
While	Used in the loop structure

Java keywords and their meanings