Error Handling and Corrections
September 30, 2000
The following is an example to handle errors in VB. It combines “On ErrorGoTo” and “On Error Resume Next” to handle all errors (minor orserious ones), as well as attempting
The following is an example to handle errors in VB. It combines “On ErrorGoTo” and “On Error Resume Next” to handle all errors (minor orserious ones), as well as attempting
In JavaScript you can use isNaN to check if the given data is numeric ornon-numeric.Syntax : isNaN(testdata)ReturnValue :True if the testdata is non-numeric.False if the testdata is numeric.Here’s an example:
The following methods can be used for creating new instance of your classes, depending on your specific needs. import java.lang.ClassLoader;import java.net.URLClassLoader;import java.net.URL;public class InstantiateClass { testFinally newInstance() throws Exception {
Using the -verbose option during compilation and execution is very helpful—both for obtaining more information about the classes being loaded by the compiler and the interpreter and to find out
Once you are finished iterating through the values of an Object implementing the Enumeration interface, the next time youtry to use hasMoreElements() it will return false. Many developers are not
Use the fillInStackTrace() method to rethrow a Throwable type of exceptional condition in your code. This is useful if you want to rethrow a exception occurred while using a method
Validating user input that is typed into a JTextField can becumbersome, especially if the input string must be converted to anumeric value such as an int. By subclassing JTextField, however,
The SELECT INTO statement is a combination of the SELECT and INSERT T-SQL commands, that lets you create a new table from a subset of the rows and/or the columns
The keywords false and true are Boolean literals that evaluate to 0 and 1 respectively. Note that in other programming language, VB for instance, false equals -1 and true equals