Source Code : Table Utilities

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Table Utilities

 
/*
Core SWING Advanced Programming 
By Kim Topley
ISBN: 0 13 083292 8       
Publisher: Prentice Hall  
*/

import javax.swing.*;
import javax.swing.table.*;
import java.awt.*;

public class TableUtilities {
  // Calculate the required width of a table column
  public static int calculateColumnWidth(JTable table, 
                  int columnIndex) {
    int width = 0;      // The return value
    int rowCount = table.getRowCount();      
    
    for (int i = 0; i < rowCount ; i++) {
      TableCellRenderer renderer = table.getCellRenderer(i, columnIndex);
      Component comp = renderer.getTableCellRendererComponent(
                table, table.getValueAt(i, columnIndex),
                false, false, i, columnIndex);
      int thisWidth = comp.getPreferredSize().width;
      if (thisWidth > width) {
        width = thisWidth;
      }
    }    

    return width;    
  }

  // Set the widths of every column in a table
  public static void setColumnWidths(JTable table, Insets insets,
                  boolean setMinimum, 
                  boolean setMaximum) {
    int columnCount = table.getColumnCount();
    TableColumnModel tcm = table.getColumnModel();
    int spare = (insets == null ? 0 : insets.left + insets.right);
    
    for (int i = 0; i < columnCount; i++) {
      int width = calculateColumnWidth(table, i);
      width += spare;

      TableColumn column = tcm.getColumn(i);
      column.setPreferredWidth(width);
      if (setMinimum == true) {
        column.setMinWidth(width);
      }
      if (setMaximum == true) {
        column.setMaxWidth(width);
      }
    }
  }

  // Sort an array of integers in place
  public static void sort(int[] values) {
    int length = values.length;
    if (length > 1) {
      for (int i = 0; i < length - 1 ; i++) {
        for (int j = i + 1; j < length; j++) {
          if (values[j] < values[i]) {
            int temp = values[i];
            values[i] = values[j];
            values[j] = temp;
          }
        }
      }
    }
  }
}

  

           
         
  

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