小编amc*_*con的帖子

首先，我将解释我的目标。我想渲染一个像这样的表格：

每个单元格的内容在执行时间中确定，但其大小固定为 13x13。

因此，我的方法是创建一个平铺窗格，将列数设置为 13 并创建单元格。

pane = new TilePane();
pane.setPadding(new Insets(10, 10, 10, 10));
pane.setVgap(5);
pane.setHgap(5);
pane.setPrefColumns(13);

这有效：

但是当我调整窗口大小时：

现在已经有13栏了！

我的测试代码：

package sample;

import javafx.application.Application;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.Region;
import javafx.scene.layout.TilePane;
import javafx.stage.Stage;

public class Main extends Application {
    @Override
    public void start(Stage primaryStage) {
        try {
            TilePane pane = new TilePane();
            pane.setPadding(new Insets(10, 10, 10, 10));
            pane.setVgap(5);
            pane.setHgap(5);
            pane.setPrefColumns(13);
            pane.setMaxWidth(Region.USE_PREF_SIZE);
            ObservableList<Node> list = pane.getChildren();

            for (int i = 0;i < …

将字符串解析为localdatetime时,我遇到一个奇怪的问题

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class Main {

    public static void main(String args[])
    {
        DateTimeFormatter formatter = DateTimeFormatter.ISO_LOCAL_TIME;
         LocalDateTime.parse("00:00",formatter);
    }

}

给我吗:

Exception in thread "main" java.time.format.DateTimeParseException: Text '00:00' could not be parsed: Unable to obtain LocalDateTime from TemporalAccessor: {},ISO resolved to 00:00 of type java.time.format.Parsed
    at java.time.format.DateTimeFormatter.createError(Unknown Source)
    at java.time.format.DateTimeFormatter.parse(Unknown Source)
    at java.time.LocalDateTime.parse(Unknown Source)
    at Main.main(Main.java:9)
Caused by: java.time.DateTimeException: Unable to obtain LocalDateTime from TemporalAccessor: {},ISO resolved to 00:00 of type java.time.format.Parsed
    at java.time.LocalDateTime.from(Unknown Source)
    at java.time.format.Parsed.query(Unknown Source) …