Exceptions and errors both are subclasses of Throwable class. The error indicates a problem that mainly occurs due to the lack of system resources and our application should not catch these types of problems. Some of the examples of errors are system crash error and out of memory error. Errors mostly occur at runtime that's they belong to an unchecked type.
Exceptions are the problems which can occur at runtime and compile time. It mainly occurs in the code written by the developers. Exceptions are divided into two categories such as checked exceptions and unchecked exceptions.
| Sr. No. | Key | Error | Exception |
|---|---|---|---|
| 1 | Type | Classified as an unchecked type | Classified as checked and unchecked |
| 2 | Package | It belongs to java.lang.error | It belongs to java.lang.Exception |
| 3 | Recoverable/ Irrecoverable | It is irrecoverable | It is recoverable |
| 4 | It can't be occur at compile time | It can occur at run time compile time both | |
| 5 | Example | OutOfMemoryError ,IOError | NullPointerException , SqlException |
Example of Error
public class ErrorExample {
public static void main(String[] args){
recursiveMethod(10)
}
public static void recursiveMethod(int i){
while(i!=0){
i=i+1;
recursiveMethod(i);
}
}
}Output
Exception in thread "main" java.lang.StackOverflowError at ErrorExample.ErrorExample(Main.java:42)
Example of Exception
public class ExceptionExample {
public static void main(String[] args){
int x = 100;
int y = 0;
int z = x / y;
}
}Output
java.lang.ArithmeticException: / by zero at ExceptionExample.main(ExceptionExample.java:7)