“Actual or formal argument lists differs in length”

You try to instantiate an object of the Friends class like this: The class does not have a constructor that takes parameters. You should either add the constructor, or create the object using the constructor that does exist and then use the set-methods. For example, instead of the above:

eclipse won’t start – no java virtual machine was found

Two ways to work around this . Recommended way : In your eclipse.ini file make sure you are pointing -vm to your jdk installation. More on this here. Make sure to add -vm before the -vmargs section. Pass in the vm flag from command line. http://wiki.eclipse.org/FAQ_How_do_I_run_Eclipse%3F#Find_the_JVM Note : Eclipse DOES NOT consult the JAVA_HOME environment … Read more

javac: file not found: first.java Usage: javac

I have a filename named “first.java” saved on my desktop in notepad++. When I run the cmd command “javac first.java” it gives me this error. I know you are required to go to C:\Programfiles\java\jdk. and in my C:\Program Files\Java\ I have thesE folders “jdk1.8.0” “jre6” “jre8” In C:\Program Files (x86)\Java I have this folder“jre6” The … Read more

Sort a Map by values

I am relatively new to Java, and often find that I need to sort a Map<Key, Value> on the values. Since the values are not unique, I find myself converting the keySet into an array, and sorting that array through array sort with a custom comparator that sorts on the value associated with the key. … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)