Sorting a Column in a JTable Component : Table « Swing JFC « Java

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Java » Swing JFC » Table

Sorting a Column in a JTable Component






import java.util.Arrays;

import java.util.Comparator;

import java.util.Vector;



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);

    table.setAutoCreateColumnsFromModel(false);



    boolean ascending = false;

    Vector data = model.getDataVector();

    Object[] colData = new Object[model.getRowCount()];



    for (int i = 0; i < colData.length; i++) {

      colData[i] = ((Vector) data.get(i)).get(0);

    }

    Arrays.sort(colData, new ColumnSorter());

    for (int i = 0; i < colData.length; i++) {

      ((Vector) data.get(i)).set(0, colData[i]);

    }

    model.fireTableStructureChanged();

  }

}



class ColumnSorter implements Comparator {

  ColumnSorter() {

  }



  public int compare(Object a, Object b) {

    if (a instanceof String && ((String) a).length() == 0) {

      a = null;

    }

    if (b instanceof String && ((String) b).length() == 0) {

      b = null;

    }

    if (a == null && b == null) {

      return 0;

    } else if (a == null) {

      return 1;

    } else if (b == null) {

      return -1;

    } else if (a instanceof Comparable) {

      return ((Comparable) a).compareTo(b);

    } else {

      return a.toString().compareTo(b.toString());

    }

  }

}

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37.	ListSelectionModel rowSelMod = JTable.getSelectionModel();
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47.	Showing the Table Header in a Non-Scrollable JTable Component
48.	Changing the Name of a Column in a JTable Component
49.	Displaying an Icon in a Column Head of a JTable Component
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51.	Removing the Column Headers from a Scrollable in a JTable Component
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53.	Setting Column Header Tool Tips in a JTable Components
54.	Setting Tool Tips on Cells in a JTable Component
55.	Enable row selection (default) in a JTable
56.	Enable column selection in a JTable
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59.	Allow only single a selection
60.	Allow selection to span one contiguous set of rows, visible columns, or block of cells
61.	Allow multiple selections of rows, visible columns, or cell blocks (default)
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63.	Select an additional range of columns - columns 1 to 2
64.	Deselect a range of columns - columns 0 to 1
65.	Select a row - row 0
66.	Select an additional range of rows - rows 1 to 2
67.	Deselect a range of rows - rows 0 to 1
68.	Select a cell: cell (2,1)
69.	Extend the selection to include all cells (5,3)
70.	Deselect a cell: cell (3,2), All cells in the row and column containing (3,2) are deselected.
71.	Toggles the selection state, if it were called again, it exactly reverses the first call.
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73.	Deselect all cells
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75.	Row selection is enabled, Get the indices of the selected rows
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80.	Getting the Anchor Cell in a JTable Component
81.	Creating a Scrollable JTable Component
82.	Disable auto resizing to make the table horizontal scrollable
83.	Determining If a Cell Is Visible in a JTable Component
84.	Making a Cell Visible in a JTable Component
85.	Scrolling a Cell to the Center of a JTable Component
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98.	Disabling User Edits in a JTable with DefaultTableModel
99.	Sorting the Rows in a JTable Component Based on a Column
100.	Listening for Selection Events in a JTable Component
101.	Listening for Changes to the Rows and Columns of a JTable Component
102.	Listening for Column-Related Changes in a JTable Component
103.	Listening for Clicks on a Column Header in a JTable Component
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