<div>
<blockquote>
When you write your own exception, you can choose to extend either Exception (producing a checked exception) or RuntimeException (producing an unchecked exception).
</blockquote>
 
can you please share simple examples on both these?
</div>

<div>
Something like this should be what you need (done from memory so may have small typos): 
 

<pre><code class="code-1 nolinks" id="code-20-41549438-1">public class MyCheckedException extends Exception {
 public MyCheckedException(String msg) { super(msg) ; }
}

public class MyUnCheckedException extends RuntimeException {
 public MyUnCheckedException(String msg) { super(msg) ; }
}
</code></pre>
</div>

<div>
<a href="http://www.javatpoint.com/custom-exception" rel="ugc">http://www.javatpoint.com/custom-exception</a> 
i see some discussion here on differences but i was not clear on the conclusion 
 
<a href="http://stackoverflow.com/questions/19857008/extending-exception-runtimeexception-in-java" rel="ugc">http://stackoverflow.com/questions/19857008/extending-exception-runtimeexception-in-java</a> 
 
can you please elaborate?
</div>

<div>
I think you'd better try to explain what you're not clear about. &nbsp;Otherwise we'll just end up summarizing those articles. 
 
Doug
</div>

<div>
<pre><code class="code-10 nolinks" id="code-20-41594047-1">class InvalidAgeException extends Exception{ 
 InvalidAgeException(String s){ 
 super(s); 
 } 
} 
class TestCustomException1{ 
 
 static void validate(int age)throws InvalidAgeException{ 
 if(age&lt;18) 
 throw new InvalidAgeException(&quot;not valid&quot;); 
 else 
 System.out.println(&quot;welcome to vote&quot;); 
 } 
 
 public static void main(String args[]){ 
 try{ 
 validate(13); 
 }catch(Exception m){System.out.println(&quot;Exception occured: &quot;+m);} 
 
 System.out.println(&quot;rest of the code...&quot;); 
 } 
} 
</code></pre>
 
above produced 
 
Exception occured: InvalidAgeException: not valid 
rest of the code... 
 
 
can i instead write as below with RuntimeException not Exception? 

<pre><code class="code-10 nolinks" id="code-20-41594047-2">class InvalidAgeException extends RuntimeException{ 
 InvalidAgeException(String s){ 
 super(s); 
 } 
} 
class TestCustomException1{ 
 
 static void validate(int age)throws InvalidAgeException{ 
 if(age&lt;18) 
 throw new InvalidAgeException(&quot;not valid&quot;); 
 else 
 System.out.println(&quot;welcome to vote&quot;); 
 } 
 
 public static void main(String args[]){ 
 try{ 
 validate(13); 
 }catch(Exception m){System.out.println(&quot;Exception occured: &quot;+m);} 
 
 System.out.println(&quot;rest of the code...&quot;); 
 } 
} 
</code></pre>
</div>

<div>
<pre><code class="code-10 nolinks" id="code-20-41594051-1">class InvalidAgeException extends RuntimeException{ 
 InvalidAgeException(String s){ 
 super(s); 
 } 
} 
class TestCustomException1{ 
 
 static void validate(int age)throws InvalidAgeException{ 
 if(age&lt;18) 
 throw new InvalidAgeException(&quot;not valid&quot;); 
 else 
 System.out.println(&quot;welcome to vote&quot;); 
 } 
 
 public static void main(String args[]){ 
 try{ 
 validate(13); 
 }catch(Exception m){System.out.println(&quot;Exception occured: &quot;+m);} 
 
 System.out.println(&quot;rest of the code...&quot;); 
 } 
} 
</code></pre>
 
above also gave same output 
 
Exception occured: InvalidAgeException: not valid 
rest of the code... 
 
 
Not sure why 
 
does not checked and Runtime(unchecked) both extend Exception class which extends in turn Throwable? 
if we instead write &nbsp;Extends Exception we can cove both checked and Runtime(unchecked) ?
</div>

<div>
<a href="http://www.javatpoint.com/exception-handling-in-java" rel="ugc">http://www.javatpoint.com/exception-handling-in-java</a> 
 
why the diagram in above link do not have CheckedException box kind of thing like RuntimeException instead they put outside only checked exceptions like IOException
</div>

<div>
<div class="content wysiwyg-content">
Hi, 
 
Why customized or user defined exceptions always extends RuntimeExceptions(is there is something like extends CompileTimeException class??). How to create and usage of them? 
Please advise
</div>
</div>

Hi,

Why customized or user defined exceptions always extends RuntimeExceptions(is there is something like extends CompileTimeException class??). How to create and usage of them?
Please advise

customized or user defined exceptions

Java is a platform-independent, object-oriented programming language and run-time environment, designed to have as few implementation dependencies as possible such that developers can write one set of code across all platforms using libraries. Most devices will not run Java natively, and require a run-time component to be installed in order to execute a Java program.

Java

Java Enterprise Edition (Java EE) is a specification defining a collection of Java-based server and client technologies and how they interoperate. Java EE specifies server and client architectures and uses profiles to define technology sets targeted at specific classes of applications. All Java EE profiles share a set of common features, such as naming and resource injection, packaging rules and security requirements.