Write a catch block that handles java.lang.Exception : Exception « Development « Java Tutorial

All Java exception classes derive from the java.lang.Exception class. When a method throws multiple exceptions, rather than catch all the exceptions, you can simply write a catch block that handles java.lang.Exception:

public class MainClass {

  public static void main(String[] args) {
    String input = null;
    try {
      String capitalized = capitalize(input);
    } catch (Exception e) {

  static String capitalize(String s) throws NullPointerException, AlreadyCapitalizedException {
    if (s == null) {
      throw new NullPointerException("Your passed a null argument");
    Character firstChar = s.charAt(0);
    if (Character.isUpperCase(firstChar)) {
      throw new AlreadyCapitalizedException();
    String theRest = s.substring(1);
    return firstChar.toString().toUpperCase() + theRest;


class AlreadyCapitalizedException extends Exception {
  public String toString() {
    return "Input has already been capitalized";

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