Java Programming Language Keywords

private: This keyword restrict a method or a variable so that it can only can accessed  from within its own class.
protected: This keyword restrict a method or a variable so that it can only can be accessible to classes in the same package or subclasses of the class.
public: This keyword allow a method, a variable or a class to be accessed from any other class.

abstract: Used to declare a class that cannot be instantiated, or a method that must be implemented by a nonabstract subclass.
class: Keyword used to specify a class.
extends: Used to indicate the superclass that a subclass is extending.
final: Makes it impossible to extend a class, override a method, or reinitialize a variable.
implements: Used to indicate the interfaces that a class will implement.
interface: Keyword used to specify an interface.
native: Indicates a method is written in a platform-dependent language, such as C.
new: Used to instantiate an object by invoking the constructor.
static: Makes a method or a variable belong to a class as opposed to an instance.
strictfp: Used in front of a method or class to indicate that floating-point numbers will follow FP-strict rules in all expressions.
synchronized: Indicates that a method can be accessed by only one thread at a time.
transient: Prevents fields from ever being serialized. Transient fields are always skipped when objects are serialized.
volatile: Indicates a variable may change out of sync because it is used in threads.

break: Exits from the block of code in which it resides.
case: Executes a block of code, dependent on what the switch tests for.
continue: Stops the rest of the code following this statement from executing in a loop and then begins the next iteration of the loop.
default: Executes this block of code if none of the switch-case statements match.
do: Executes a block of code one time, then, in conjunction with the while statement, it performs a test to determine whether the block should be executed again.
else: Executes an alternate block of code if an if test is false.
for: Used to perform a conditional loop for a block of code.
if: Used to perform a logical test for true or false.
instanceof: Determines whether an object is an instance of a class, super class, or interface.
return: Returns from a method without executing any code that follows the statement (can optionally return a variable).
switch: Indicates the variable to be compared with the case statements.
while: Executes a block of code repeatedly while a certain condition is true..

catch: Declares the block of code used to handle an exception.
finally: Block of code, usually following a try-catch statement, which is executed no matter what program flow occurs when dealing with an exception.
throw: Used to pass an exception up to the method that called this method.
throws: Indicates the method will pass an exception to the method that called it.
try: Block of code that will be tried, but which may cause an exception.
assert: Evaluates a conditional expression to verify the programmer’s assumption.

import: Statement to import packages or classes into code.
package: Specifies to which package all classes in a source file belong.

boolean, byte, char, double, float, int, long, short

super: To refer to the  immediate superclass this keyword is used.
this: To refer to the  current instance of an object this keyword is used.

void: It indicates that there is no return type for the method.

goto(harmful for the program), const(should use public static final)