Exception Handling in Java program.
Throwable interface has three class.
- Error
- Runtime Exception
- Exception
There are two types of
exception in
Java.
Checked: Which can be handle using
try and catch block
- Exception class comes under the checked exception which we can handle.
- NullPointerException
- DivideByZeroException
- IndexOutOfBoundException
- ClassCastException
Unchecked : Which cannot be handle.
- Error and Runtime Exception come under the unchecked exception which we can't handle.
Below is a example program:
package rashid;
public class testException {
public static void main(String[] args) {
String var1=null;
System.out.println(var1.length());
}
}
Output:
Exception in thread "main" java.lang.NullPointerException
at rashid.testException.main(testException.java:8)
