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.
h e lines you might want to make withdraw and deposit non-static and let it modify the balance and remove the balance parameter from the call
When I run the Eclipse.exe within the given folder, it will not start. The Eclipse splash screen will appear for a split second then close. There are no errors. I’ve tried practically everything. Updating JDK and JRE: I installed JRE 7 and JDK 1.7.0_40. Both 64 bit, and they are both in the (x86) folder. … Read more
You must be providing the wrong path to the debug.keystore file. Follow these steps to get the correct path and complete your command: In eclipse, click the Window menu -> Preferences -> Expand Android -> Build In the right panel, look for: Default debug keystore: Select the entire box next to the label specified in … Read more
I am having a problem with calling a method that is in a different class. This main method is in a class on its own called lab14, and the heapSort() method is in a different class called HeapSort. Both of these classes are in the default package. I am getting the error “The method heapSort(Vector) … Read more
Why is the above invalid character constant Because of this part: That’s trying to specify a character literal which is actually two characters (an apostrophe and a space). A character literal must be exactly one character. If you want to specify “apostrophe space” you should use a string literal instead – at which point the … Read more
The exception message is actually pretty descriptive. The contract it mentions is transitivity: if A > B and B > C then for any A, B and C: A > C. I checked it with paper and pencil and your code seems to have few holes: you do not return -1 if card1.getRarity() > card2.getRarity(). … Read more
If all of your classes are in the same package, you shouldn’t need to import them. Simply instantiate the object like so: CustomObject myObject = new CustomObject();