Keywords
Keywords are reserved words in Java that have special meaning to the compiler. They cannot be used as identifiers for classes, variables, or methods. Because they serve predefined purposes in the language. Here, I’ll provide a list of Java keywords and a brief explanation of their usage:
| Table Header | ||||
|---|---|---|---|---|
|
abstract 5 |
default |
if |
protected |
Throws |
|
assert |
do |
implements |
public |
Transient |
|
boolean |
double |
import |
return |
try |
|
break |
else |
instanceof |
short |
Void |
|
byte |
enum |
int |
static |
Volatile |
|
case |
extends |
interface |
strictfp |
var (Added in Java 10 for local variable type inference) |
|
catch |
final |
long |
super |
while |
|
char |
finally |
native |
Switch |
yield (Added in Java 13 for switch expressions |
|
class |
float |
new |
Synchronized |
|
|
Const (Not used, reserved for future use) |
for |
package |
This |
|
|
continue |
Goto (Not used, reserved for future use) |
private |
Throw |
|
Please note that the list above is based on the Java language specifications up to Java 20. New versions of Java may introduce additional keywords or modify the use of existing ones.
Here are some of the most common used keywords in Java:
- Abstract :- Used to declare an abstract class.
- Class :- Used to declare a class.
- Public :- Used to declare a public class, method, or field.
- Private :- Used to declare a private class, method, or field.
- Static :- Used to declare a static method or field.
- Void :- Used to declare a method that does not return a value.
- New :- Used to create a new object.
- This :- Used to refer to the current object.
- Super :- Used to refer to the parent class.