swing 选项框（全选）

private void box_gz_area1StateChanged(javax.swing.event.ChangeEvent evt) {
if (((javax.swing.JCheckBox)
evt.getSource()).isSelected()) {
this.box_gz.setSelected(true);
this.box_jm.setSelected(true);
this.box_yf.setSelected(true);
this.box_yj.setSelected(true);
} else {
this.box_gz.setSelected(false);
this.box_jm.setSelected(false);
this.box_yf.setSelected(false);
this.box_yj.setSelected(false);
}
}