Defining Your Own Exceptions, Throwing Your Own Exception : Exception « Development « Java Tutorial

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Java Tutorial » Development » Exception 
6.23.11.Defining Your Own Exceptions, Throwing Your Own ExceptionPrevious/Next
class DreadfulProblemException extends ArithmeticException {
  public DreadfulProblemException() {
  }
  public DreadfulProblemException(String s) {
    super(s)
  }
}
public class MainClass{
  public static void main(String[] a){
    int[] array = new int[]{1,0,2};
    int index = 0;
    try {
      System.out.println("First try block in divide() entered");
      array[index + 2= array[index]/array[index + 1];
      System.out.println("Code at end of first try block in divide()");
    catch(ArithmeticException e) {
      System.out.println("Arithmetic exception caught in divide()");
      throw new DreadfulProblemException("index + 1");    // Throw new exception
    catch(ArrayIndexOutOfBoundsException e) {
      System.out.println(
                  "Index-out-of-bounds index exception caught in divide()");
    }
    System.out.println("Executing code after try block in divide()");
  }
}
First try block in divide() entered
Arithmetic exception caught in divide()
Exception in thread "main" DreadfulProblemException: index + 1
  at MainClass.main(MainClass.java:20)
6.23.Exception
6.23.1.Error Handling
6.23.2.Types of Exceptions
6.23.3.Java's Unchecked RuntimeException Subclasses
6.23.4.Java's Checked Exceptions Defined in java.lang
6.23.5.Throwing an Exception from a Method
6.23.6.Write a catch block that handles java.lang.Exception
6.23.7.Handling Exceptions
6.23.8.Multiple catch Blocks
6.23.9.The finally Block
6.23.10.Exception Objects: stack trace
6.23.11.Defining Your Own Exceptions, Throwing Your Own Exception
6.23.12.Demonstrate exception chaining.
6.23.13.Getting the Stack Trace of an Exception
6.23.14.Put printStackTrace() into a String: redirect the StackTrace to a String with a StringWriter/PrintWriter
6.23.15.Check whether given exception is compatible with the exceptions declared in a throws clause
6.23.16.Convert an exception to a String with full stack trace
6.23.17.Get Deepest Throwable
6.23.18.Get the stack trace of the supplied exception.
6.23.19.Is Checked Exception
6.23.20.Locates a particular type of exception
6.23.21.Make a string representation of the exception
6.23.22.Print all of the thread's information and stack traces
6.23.23.Return stack trace from the passed exception as a string
6.23.24.Returns the root cause of an exception
6.23.25.Create a new Exception, setting the cause if possible.
6.23.26.Returns the output of printStackTrace as a String.
6.23.27.This program creates a custom exception type.
6.23.28.Utility methods for dealing with stack traces
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