The pack method sizes the frame so that all its contents are at or above their preferred sizes. An alternative to pack is to establish a frame size explicitly by calling setSize or setBounds (which also sets the frame location). In general, using pack is preferable to calling setSize, since pack leaves the frame layout manager in charge of the frame size, … Read more
For you code Change nextLine(); to next(); and it will work. to get an idea for you to what happened was this: nextLine(): Advances this scanner past the current line and returns the input that was skipped. next(): Finds and returns the next complete token from this scanner. Also like the many of the answers says use equals() instead of using == The == checks only the … Read more
Being new to Java, one of the resources you need to have on hand is the Oracle documentation pages, for example: https://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html That will guide you on what a Scanner can do. Specifically, you should look for .nextLine()
I think your problem is that you are not using good OO design for your player and enemies. Create two classes: Your Player should have X,Y,Width,and Height variables. Your enemies should as well. In your game loop, do something like this (C#): To speed things up, don’t bother checking if the enemies coords are offscreen.
It’s a new feature in Java 8 which allows an interface to provide an implementation. Described in Java 8 JLS-13.5.6. Interface Method Declarations which reads (in part) Adding a default method, or changing a method from abstract to default, does not break compatibility with pre-existing binaries, but may cause an IncompatibleClassChangeError if a pre-existing binary attempts to invoke the method. This error occurs if the qualifying … Read more
From wikipedia In Java, all non-static methods are by default “virtual functions.” Only methods marked with the keyword final, which cannot be overridden, along with private methods, which are not inherited, are non-virtual.
A class can’t be both final and abstract. You can prevent instantiation by hiding the constructor, and raising an exception to prevent instantiation via reflection. That looks like this:
Java 7 defaults to TLS 1.0, which can cause this error when that protocol is not accepted. I ran into this problem with a Tomcat application and a server that would not accept TLS 1.0 connections any longer. I added to the Java options and that fixed it. (Tomcat was running Java 7.)
First declare your method to accept a parameter: Then pass it: Using an instance variable is not a good choice, because it would require calling some code to set up the value before take() is called, and take() have no control over that, which could lead to bugs. Also it wouldn’t be threadsafe.