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Java Exceptions & Try-Catch Block


Exceptions in Java


An exception is an event that occurs when a program is executed dissented the normal flow of instructions.
There are mainly two types of exceptions in java:

1) Checked exceptions - compile-time exceptions (Handle by the compiler)
2) Unchecked exceptions - Runtime exceptions

Commonly Occurring Exceptions


Following are few commonly occurring exceptions in java:

1) Null pointer exception
2) Arithmetic Exception
3) Array Index out of Bound exception
4) Illegal Argument Exception
5) Number Format Exception

Example


package com.company;

public class cwh_80_try {
    public static void main(String[] args) {
        int a = 6000;
        int b = 0;
        // Without Try:
//        int c = a / b;
//        System.out.println("The result is " + c);
        // With Try:
        try {
            int c = a / b;
            System.out.println("The result is " + c);
        }
        catch(Exception e) {
            System.out.println("We failed to divide. Reason: ");
            System.out.println(e);
        }
        System.out.println("End of the program");
    }
}


Conclusion

In this page (written and validated by ) you learned about Java Exceptions & Try-Catch Block . What's Next? If you are interested in completing Java tutorial, your next topic will be learning about: Java Handling Specific Exceptions.



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