Devise a command that allows you to extract all valid java-style int definitions from the following file:

Put the command in a file named Java.txt (1.0%).

int aDog; int aDog i // int aCommentAboutADog; double aBigDog; int BadDog; int dogWithNoTail int aDog, acat; int aSpaceDog, aSpaceCat; int aDog, aBadCat; internationalDog; int a#Dog; int internetName; // fooo