Run your application in debug mode by clicking on in the upper menu of Android Studio. In the bottom status bar, click 5: Debug button, next to the 4: Run button. Now you should select the Logcat console. In search box, you can type the tag of your message, and your message should appear, like … Read more
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
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
Eclipse expects the declared package to match the directory hierarchy – so it’s expecting your Java file to be in a directory called “Devices” under your source root. At the moment it looks like the file is directly in your source root. So create the appropriate directory, and move the file in there. Note that … Read more
Java 8 and above Using Java 8+ lambda expressions, if you have a class or interface with only a single abstract method (sometimes called a SAM type), for example: then anywhere where MyInterface is used, you can substitute a lambda expression: For example, you can create a new thread very quickly: And use the method … Read more
Because of how generics in Java work, you cannot directly create an array of a generic type (such as Map<String, Object>[]). Instead, you create an array of the raw type (Map[]) and cast it to Map<String, Object>[]. This will cause an unavoidable (but suppressible) compiler warning. This should work for what you need: You may … Read more
Try to upgrade your buildToolsVersion to “23.0.1”, like this: If you didn’t install the buildTools for this version, please download it with SDKManager as hint.
