在JTable中自动从特定列（即不必选择行）获取所有ID

Question

I would like,as the title suggests, to be able to get all the values in an ID column from a JTable without the user actually selecting a row (and thus ID).Lets say there are two results in the JTable, that means there are two items in the ID column. Is there a way that I extract these values automatically.

Answer 1

Much depends on your goal, but you can

• Traverse the TableModel , invoking getColumnClass() for each column; use getValueAt() to examine the value for a particular row.

   DefaultTableModel model = new DefaultTableModel(); … for (int col = 0; col < model.getColumnCount(); col++) { Class type = model.getColumnClass(col); } 

• Use the methods of DatabaseMetaData & ResultSetMetaData to get the details of a relation's attributes, before inserting the data into the TableModel .