问题描述

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

如何将此列中的双精度设置为具有 2 个小数位(因为它们是价格列)?默认情况下它们只显示 1 个小数位.

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

使用生成单元格的单元格工厂，该单元格使用货币格式化程序来格式化显示的文本.这意味着价格将被格式化为当前语言环境中的货币(即使用当地货币符号和适当的小数位数规则等).

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));
        }
    }
});

注意这是除了你已经在使用的cellValueFactory.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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