Insert a new column to a table : JTable Column « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JTable Column

import java.util.ArrayList;
import java.util.List;
import java.util.Vector;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

public class Main {
  public static void main(String[] argv) throws Exception {
    DefaultTableModel model = new DefaultTableModel();
    JTable table = new JTable(model);
    model.addColumn("Col1");
    model.addRow(new Object[] { "r1" });
    model.addRow(new Object[] { "r2" });
    model.addRow(new Object[] { "r3" });
    
    Vector data = model.getDataVector();
    Vector row = (Vector) data.elementAt(1);

    int mColIndex = 0;
    List colData = new ArrayList(table.getRowCount());
    for (int i = 0; i < table.getRowCount(); i++) {
      row = (Vector) data.elementAt(i);
      colData.add(row.get(mColIndex));
    }

    // Append a new column with copied data
    model.addColumn("Col3", colData.toArray());
    
    JFrame f = new JFrame();
    f.setSize(300, 300);
    f.add(new JScrollPane(table));
    f.setVisible(true);
  }
}

14.62.JTable Column
	14.62.1.	Resizable JTable Column
	14.62.2.	Specifying Fixed JTable Columns
	14.62.3.	Change Column Widths
	14.62.4.	Setting the Width of a Column in a JTable Component
	14.62.5.	Shading Rows and Columns in a JTable Component
	14.62.6.	Shades every other column yellow
	14.62.7.	Converts a visible column index to a column index in the model.
	14.62.8.	Insert a new column to a table
	14.62.9.	Converts a column index in the model to a visible column index
	14.62.10.	Returns the visible columns in the order that they appear in the model
	14.62.11.	Get the columns from TableColumnModel in the order that they appear in the view
	14.62.12.	Get column count
	14.62.13.	Returns the TableColumn associated with the specified column index in the model
	14.62.14.	Setting the Column Resize Mode of a JTable Component: Disable auto resizing
	14.62.15.	Locking the Width of a Column in a JTable Component
	14.62.16.	Appending a Column to a JTable Component using DefaultTableModel
	14.62.17.	Add a column with values.
	14.62.18.	Disable autoCreateColumnsFromModel
	14.62.19.	Add a column without affecting existing columns
	14.62.20.	Remove the first visible column without removing the underlying data
	14.62.21.	Move the last visible column so it becomes the first visible column
	14.62.22.	the last column is moved to the first position
	14.62.23.	Packing a Column of a JTable Component according to the header text
	14.62.24.	Packing a Column of a JTable Component according to the row data
	14.62.25.	Set column width based on cell renderer
	14.62.26.	Set table column auto-resize off
	14.62.27.	Changing the Name of a Column in a JTable Component
	14.62.28.	Disable auto resizing, Set the first visible column to 100 pixels wide
	14.62.29.	Change a cell in the 2nd visible column
	14.62.30.	Change a cell in the 3rd column in the model
	14.62.31.	Displaying an Icon in a Column Head of a JTable Component