Java

Taking over from others working in the code for the GWT. Even using the same eclipse, quite a difference in ease of development.

The GWT, grammar can be developed in Java, I think from a well-made and feature the JDT.

When you see you did not write their own code, especially big a difference. For Java, it's because many part-full, which ensures an easy to understand. How different from what you're asking, but I do not think.

Master data migration job (EXCEL → MySQL) for programs written in Java.

In what language was good, because rebuilding the eclipse and this in the context of just the GWT.

After a long time POI also used. I was too refactorings are up eclipse, and change the name, and dont like the extra step on the steps than ever before. There may be other way.