| Keyword | Keyword Description |
|---|
| abstract | “abstract keyword” is A non-access modifier. This Keyword Used for classes and methods. abstract class cannot be used to create objects. abstract method can only used in an abstract class, and it does not have a body. |
| assert | “assert keyword” use For debugging. |
| boolean | “boolean data type” that can only store true and false values |
| break | “break keyword” use for Breaks out of a loop or a switch block |
| byte | “byte data type” is primitive data type. Its value-range between -128 to 127 |
| case | “case keyword” Marks a block of code in switch statements |
| catch | “catch keyword” use for Catches exceptions generated by try statements |
| char | “char data type” store a single character |
| class | “class keyword” Defines a class |
| continue | “continue keyword” use Continues to the next iteration of a loop |
| const | “condt keyword” Defines a constant. Not in use – use final instead |
| default | “default keyword” Specifies the default block of code in a switch statement |
| do | Used to create a do-while loop |
| double | “double data type” that can store whole numbers from 1.7e−308 to 1.7e+308 |
| else | “else keyword” Used in conditional statements |
| enum | “enum keyword” Declares an enumerated (unchangeable) type |
| extends | “extends keyword” use for Extends a class (indicates that a class is inherited from another class) |
| final | “final keyword” is non-access modifier used for classes, attributes and methods, which makes them non-changeable (impossible to inherit or override) |
| finally | “finally keyword” Use with exceptions, a block of code that will be executed no matter if there is an exception or not |
| float | “float data type” store whole numbers from 3.4e−038 to 3.4e+038 |
| for | “for keyword” use for Create a for loop |
| goto | Not in use, and has no function |
| if | “if keyword” Makes a conditional statement |
| implements | “implements keyword” Implements an interface |
| import | Used to import a package, class or interface |
| instanceof | Checks whether an object is an instance of a specific class or an interface |
| int | “int data type” is primitive data type. Its value-range between -2147483648 to 2147483647. |
| interface | “interface keyword” Use to declare a special type of class that only contains abstract methods |
| long | “long data type” is primitive data type. Its value-range between -9223372036854775808 to 9223372036854775808 |
| module | “module keyword” Declares a module. New in Java 9 |
| native | “native keyword” Specifies that a method is not implemented in the same Java source file (but in another language) |
| new | “new keyword” use for Creates new objects |
| package | Declares a package |
| private | “private access modifier” use for attributes, methods and constructors, making them only accessible within the declared class |
| protected | “protected access modifier” use for attributes, methods and constructors, making them accessible in the same package and subclasses |
| public | “public access modifier” use for classes, attributes, methods and constructors, making them accessible by any other class |
| requires | “requires keyword” Specifies required libraries inside a module. New in Java 9 |
| return | “return keyword” use for Finished the execution of a method, and can be used to return a value from a method |
| short | “short data type” is primitive data type. Its value-range between -32768 to 32767 |
| static | “static non-access modifier” use for methods and attributes. Static methods or attributes can be accessed without creating an object of a class |
| strictfp | “strictfp keyword” use to Restrict the precision and rounding of floating point calculations |
| super | “super keyword” Refers to superclass (parent) objects |
| switch | “switch keyword” use for Selects one of many code blocks to be executed |
| synchronized | “synchronized non-access modifier”, which specifies that methods can only be accessed by one thread at a time |
| this | “this keyword” Refers to the current object in a method or constructor |
| throw | “throw keyword” use for Creates a custom error |
| throws | “throws keyword” Indicates what exceptions may be thrown by a method |
| transient | “transient non-accesss modifier”, which specifies that an attribute is not part of an object’s persistent state |
| try | “try keyword” use for Creates a try{}catch{} statement |
| var | declares a variable. New in Java 10 |
| void | “void keyword” Specifies a method should not have a return value |
| volatile | “volatile keyword” is attribute is not cached thread-locally, and is always read from the “main memory” |
| while | “while keyword” use for Creates a while loop |
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