TableColumn中的JavaFX格式加倍

问题描述

TableColumn<Product, Double> priceCol = new TableColumn<Product,Double>("Price");
priceCol.setCellValueFactory(new PropertyValueFactory<Product, Double>("price"));

如何格式化此列中的双精度数以获得2位小数（因为它们是价格）？默认情况下，它们只显示1位小数。

How do I format the doubles in this column to have 2 decimal places(Because they are the column for price)?By default they only show 1 decimal place.

推荐答案

使用生成使用货币格式化程序的单元格的单元工厂格式化显示的文本。这意味着价格将被格式化为当前区域设置中的货币（即使用本地货币符号和小数位数的适当规则等）。

Use a cell factory that generates cells that use a currency formatter to format the text that is displayed. This means the price will be formatted as a currency in the current locale (i.e. using the local currency symbol and appropriate rules for number of decimal places, etc.).

NumberFormat currencyFormat = NumberFormat.getCurrencyInstance();
priceCol.setCellFactory(tc -> new TableCell<Product, Double>() {

    @Override
    protected void updateItem(Double price, boolean empty) {
        super.updateItem(price, empty);
        if (empty) {
            setText(null);
        } else {
            setText(currencyFormat.format(price));
        }
    }
});

注意除了 cellValueFactory之外，这是 您已经在使用。 cellValueFactory 确定单元格中显示的值; cellFactory 确定定义如何显示它的单元格。

Note this is in addition to the cellValueFactory you are already using. The cellValueFactory determines the value that is displayed in a cell; the cellFactory determines the cell that defines how to display it.

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