Java Basic Problems

JTable Cell Validation: How to make JTable Cell allow or accept only integer (numeric) number/data.

JTable Cell ValidationSometimes in programming while we do our work with JTable cell, we may need to make the JTable cell Such that it will allow or accept only numeric or number type data from users and will not allow any other type of data in that cell. In the following example(Check the picture), I have made the cells of Column-2 such that  they will allow only numeric data and it will show a warning message if   any character or string type entry is detected.  Just Copy the code and run it.