How do I throw an exception when I receive a signal?

What does 'throw' do in exception handling, Java?

• I am trying to understand the throw clause in Java while I am reading from a book, but I didn't understand why throw clause is declared inside try scope. Quoted from ...show more

• Answer:

  Throw is something that will allow you to provide a more generic explanation of your to end user... If we consider the same example you gave, suppose in your try catch block, division is taking place and if number is divided by 0 than an exception will be thrown and shown to user as below : "java.lang.AritmeticException : Division by 0". This message is more technical to end user. Now if you want a more generic message to be shown to user, than we can customize the message and throw it as exception, so if you encounter a situation in your try block and you are sure that it will raise an exception, so instead of default value you can give appropriate message and throw that exception. For e.g "throw new java.lang.ArtihmeticException("Number cannot be divided by 0") ".