Java: Long result = -1: cannot convert from int to long

Question

I\'m using eclipse java ee to perform java programming.

I had the following line of code in one of my functions:

Long result = -1;

Answer 1

First of all, check you Java version: run "java -version" from command line.

In Java version prior to 1.5, the correct syntax is:

Long result = new Long(1L);

In java >1.5 it's done automatically. It's called "autoboxing".

The uppercase "L" tells Java that the number should be interpreted as long.