I have searched on stackoverflow and a couple of people have said to use that method.

不,您不应在TableModel本身的上下文之外调用任何fireTableXxx方法,否则人们会认为这完全是错误的,将来会给您带来麻烦.从代码的外观来看,什么都没有改变.如果您已根据上一个问题中提供的答案更新了TableModel,则该模型中的数据与外部源没有任何关系.您需要从外部源手动重新加载数据,创建新的TableModel并将其应用于表

例如…

JButton btnRefreshAllPlayers = new JButton("Refresh");

btnRefreshAllPlayers.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent arg0) {

TableModel model = new PlayerTableModel(FileHandler.getCompletedPlayers());

table.setModel(model);

}

});

I have also tried setting a new model with the updated ArrayList and it worked but did not keep the table row widths I previously set.

对于表来说这是合理的事情,因为它不知道新模型是否具有与旧模型相同的属性/列,因此将其重置.

您可以遍历ColumnModel,在应用模型并重新应用宽度之前将列的宽度存储在List或Map中

Is there a proper way to update the JTable?

您可以为TableModel提供刷新方法,该方法可以加载数据本身并触发tableDataChanged事件

public class PlayerTableModel extends AbstractTableModel {

private final List summaries;

public PlayerTableModel(List summaries) {

this.summaries = new ArrayList(summaries);

}

// Other TabelModel methods...

public void refresh() {

summaries = new ArrayList<>(FileHandler.getCompletedPlayers());

fireTableDataChanged();

}

}

然后,您需要在ActionListener中调用此方法…

PlayerTableModel model = (PlayerTableModel)table.getMode();

model.refresh();