Java - Read For Learn

Cannot find “Package Explorer” view in Eclipse

Not all view are listed directly in every perspective … choose:

Compiling a java program into an executable

1- JSmooth .exe wrapper:JSmooth is a Java Executable Wrapper. It creates native Windows launchers (standard .exe) for your java applications. It makes java deployment much smoother and user-friendly, as it is able to find any installed Java VM by itself. When no VM is available, the wrapper can automatically download and install a suitable JVM, … Read more

Java Method Stubs

A method stub in this sense is a method with no real substance, i.e. it’s not doing what it is intended to do. Your getUserNum() method should return a user’s unique ID, but instead you’re defining a stub that simply returns -1 on every invocation. You can tell from your main() method, you’re supposed to be defining these two methods: So, … Read more

how to use math.pi in java

You’re missing the multiplication operator. Also, you want to do 4/3 in floating point, not integer math.

Scanner vs. BufferedReader

Scanner is used for parsing tokens from the contents of the stream while BufferedReader just reads the stream and does not do any special parsing. In fact you can pass a BufferedReader to a scanner as the source of characters to parse.

Where is Java’s Array indexOf?

There are a couple of ways to accomplish this using the Arrays utility class. If the array is not sorted and is not an array of primitives: If the array is primitives and not sorted, one should use a solution offered by one of the other answers such as Kerem Baydoğan’s, Andrew McKinlay’s or Mishax’s. The above code will compile even if theArray is primitive (possibly emitting … Read more

Why can array constants only be used in initializers?

This question already has answers here:Closed 9 years ago. Possible Duplicate:Arrays constants can only be used in initializers error I was studying arrays, and I came through this short-cut method of declaring and initializing an array in one line. For example, But when I tried to do following code, I got this compiler error saying “Array … Read more