FlowPane

FlowPane 根据可用的可用水平或垂直空间布置行或列中的节点。当水平空间小于所有节点宽度的总和时，它将节点包装到下一行; 当垂直空间小于所有节点高度的总和时，它将节点包装到下一列。此示例说明了默认的水平布局：

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;

public class Main extends Application {
    @Override
    public void start(Stage primaryStage) throws Exception{
        FlowPane root = new FlowPane();
        for (int i=1; i<=15; i++) {
            Button b1=new Button("Button "+String.valueOf(i));
            root.getChildren().add(b1); //for adding button to root
        }
        Scene scene = new Scene(root, 300, 250);
        primaryStage.setTitle("FlowPane Layout");
        primaryStage.setScene(scene);
        primaryStage.show();
    }
    public static void main(String[] args) {
        launch(args);
    }
}

默认 FlowPane 构造函数：

FlowPane root = new FlowPane();

额外的 FlowPane 构造函数：

FlowPane() //Creates a horizontal FlowPane layout with hgap/vgap = 0 by default.
FlowPane(double hgap, double gap) //Creates a horizontal FlowPane layout with the specified hgap/vgap.
FlowPane(double hgap, double vgap, Node... children) //Creates a horizontal FlowPane layout with the specified hgap/vgap.
FlowPane(Node... children) //Creates a horizontal FlowPane layout with hgap/vgap = 0.
FlowPane(Orientation orientation) //Creates a FlowPane layout with the specified orientation and hgap/vgap = 0.
FlowPane(Orientation orientation, double hgap, double gap) //Creates a FlowPane layout with the specified orientation and hgap/vgap.
FlowPane(Orientation orientation, double hgap, double vgap, Node... children) //Creates a FlowPane layout with the specified orientation and hgap/vgap.
FlowPane(Orientation orientation, Node... children) //Creates a FlowPane layout with the specified orientation and hgap/vgap = 0.

向布局添加节点使用父 Pane 的 add() 或 addAll() 方法：

Button btn = new Button("Demo Button");    
root.getChildren().add(btn); 
root.getChildren().addAll(…); 

默认情况下，FlowPane 从左到右布置子节点。要更改流对齐方式，请通过传入 Pos 类型的枚举值来调用 setAlignment() 方法。

一些常用的流动对齐：

root.setAlignment(Pos.TOP_RIGHT);     //for top right
root.setAlignment(Pos.TOP_CENTER);    //for top Center
root.setAlignment(Pos.CENTER);        //for Center
root.setAlignment(Pos.BOTTOM_RIGHT);  //for bottom right