Jan 1, 2021 · When you hover over the yellow line with your mouse cursor, what is the warning saying? On first iteration i=0, so substring (0, i) returns an empty string. If "".equals (x) the …

Sep 28, 2017 · If column in you db is as @Column(name = "name_you_have_in_db") If you will do @Column(name="name_you_want") then it is not possible because I guess hibernate …

I'm working on a program for a little store. When I click the button "Report", it must show a Table, like this one: Column names "A", "B"..."N", must be the names of the employees. But I can't …

Jan 20, 2017 · As suggested by the compiler, the field "Chat" is not used. What is it for? That simply warns you that the variable "Chat" is not used. You can either use it, make it …

Apr 30, 2020 · It usually means a variable is declared and not used. Or SOMETHING is named or declared and not used. It would be helpful if you showed the entire code block. EDIT: can't you …

public static void main(String[] argv) throws Exception { DefaultTableModel model = new DefaultTableModel(); JTable table = new JTable(model); model.addColumn("Col1"); …

Sometime, if you want to change the name of column, you must have to change the column header. For changing the name of column, you will need the index of column. Here, you will …

Using CurdRepository under Spring Boot always prompts the following error: Caused by: java.sql.SQLSyntaxErrorException: Unknown column 'userprofil0_.real_name' in 'field list' at …

Jul 3, 2020 · When I was started programming in java and using jTable, I faced problem of jTable background color foreground color of particular cells or rows and columns. So here are the …

Oct 22, 2012 · How to see column labels in JTable? I'm creating a user registration form using swing. Some labels are not displayed properly and column names aren't displayed either. …