@Override public void actionPerformed(ActionEvent e){
  if (e.getSource() == m_defaultButton) {
    m_matrix.initialize();
    matrixChanged();
  }
 else   if (e.getSource() == m_openButton) {
    openMatrix();
  }
 else   if (e.getSource() == m_saveButton) {
    saveMatrix();
  }
 else   if ((e.getSource() == m_classesField) || (e.getSource() == m_resizeButton)) {
    try {
      int newNumClasses=Integer.parseInt(m_classesField.getText());
      if (newNumClasses > 0 && newNumClasses != m_matrix.size()) {
        setValue(new CostMatrix(newNumClasses));
      }
    }
 catch (    Exception ex) {
    }
  }
}

@ Override public void actionPerformed ( ActionEvent e ) { if ( e . getSource ( ) == m_defaultButton ) { m_matrix . initialize ( ) ; matrixChanged ( ) ; } else if ( e . getSource ( ) == m_openButton ) { openMatrix ( ) ; } else if ( e . getSource ( ) == m_saveButton ) { saveMatrix ( ) ; } else if ( ( e . getSource ( ) == m_classesField ) || ( e . getSource ( ) == m_resizeButton ) ) { try { int newNumClasses = Integer . parseInt ( m_classesField . getText ( ) ) ; if ( newNumClasses > 0 && newNumClasses != m_matrix . size ( ) ) { setValue ( new CostMatrix ( newNumClasses ) ) ; } } catch ( Exception ex ) { } } }
responds to the user perfoming an action .
