Yes, contains is case sensitive. You can use java.util.regex.Pattern with the CASE_INSENSITIVE flag for case insensitive matching: EDIT: If s2 contains regex special characters (of which there are many) it’s important to quote it first. I’ve corrected my answer since it is the first one people will see, but vote up Matt Quail’s since he … Read more
A Runnable is basically a type of class (Runnable is an Interface) that can be put into a thread, describing what the thread is supposed to do. The Runnable Interface requires of the class to implement the method run() like so: And then use it like this: If you did not have the Runnable interface, … Read more
Go to URL in your browser: firefox – click on HTTPS certificate chain (the lock icon right next to URL address). Click “more info” > “security” > “show certificate” > “details” > “export..”. Pickup the name and choose file type example.cer chrome – click on site icon left to address in address bar, select “Certificate” … Read more
There are 2 good reasons for using a copy constructor instead of the constructor passing all parameters : when you have a complex object with many attributes it is much simpler to use the copy constructor if you add an attribute to your class, you just change the copy constructor to take this new attribute … Read more
I have Windows 7 64bit OS Installed on my laptop… When I open an application an error occurs: “Java runtime environment not found” in an error dialogue box. I have tried to solve the issue by re-installing of JRE and Java. But error remain same. Can somebody help me out. Thank You.
Your first port of call should be the documentation which explains it reasonably clearly: Thrown to indicate that an array has been accessed with an illegal index. The index is either negative or greater than or equal to the size of the array. So for example: As for how to avoid it… um, don’t do … Read more
To do this with user input:
well in class level you can only define attributes of that class, cant do any processing which you are doing in classA and classB. Processing can only be done in method. Just add main method make objects there Main method is entry point of any program in java. Dont worry if you are confused where … Read more
The error message tells you that the class version is different. In other words, the Java compiler you used in Eclipse is newer than the Java runtime you use in the command prompt. You should check which Java version you want then use only this version. To change the version you use in the command … Read more
What is wrong with the code there are lots of error while debugging. I am writing a code for a singleton class to connect with the database mysql. Here is my code I am new to java. Please help.