The Difference Between Exception and Error in Java

Exceptions and errors are subclasses of the Throwable class. The error indicates a problem mainly caused by the lack of system resources, and our application should not catch these types of problems. Some examples of errors are system crash errors and out of memory errors. Errors mostly occur at runtime because they belong to unchecked types.　

Exceptions are problems that may occur at runtime and compile time. They mainly occur in the code written by developers. Exceptions are divided into two categories, such as checked exceptions and unchecked exceptions.　

Index	Key	Error	Exception
1	Type	Categorized as unchecked types	Categorized as checked and unchecked
2	Package	It belongs to java.lang.error	It belongs to java.lang.Exception
3	Recoverable/Unrecoverable	This is unrecoverable	It is recoverable
4		It cannot occur during compile time	It can occur at the same time during runtime and compile time
5	Example	OutOfMemoryError, IOError	NullPointerException, SqlException

Error Example

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 Result

Exception in thread "main" java.lang.StackOverflowError
　　　at ErrorExample.ErrorExample(Main.java:42)

Exception Example

public class ExceptionExample {
　　　public static void main(String[] args){
　　　　　　int x =　100;
　　　　　　int y = 0;
　　　　　　int z = x　/　y;
　　　}
}

Output Result

java.lang.ArithmeticException:　/　by zero
　　　at ExceptionExample.main(ExceptionExample.java:7)

Basic Tutorial