JavaFX 显示来自其他类数组的 ImageView

Question

我已经将最小代码库设置为可传递的，希望它能有所帮助，例如您可以在构造函数 BufferedImage.getSubImage 的第 2 类中根据需要使用随机 PNG 图像文件，仅从 1 个文件中获取所有需要的图像并添加每个 BufferedImage转换为 ImageView，将其分配给最多 32 个数组:)

第 1 类:

import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.effect.DropShadow;
import javafx.scene.effect.GaussianBlur;
import javafx.scene.effect.Glow;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.scene.text.Text;
import javafx.stage.Stage;

public class Game extends Application{
private GameMenu gameMenu;

@Override
public void start(Stage primaryStage) throws Exception {
    // nastavenie pozadia

    Pane root = new Pane();
    root.setPrefSize(1600,900);
    primaryStage.setResizable(false); // resize okna = false
    primaryStage.show(); // kebyze to nemame mame hnusne biele okraje xD

    this.gameMenu = new GameMenu();
    this.gameMenu.setVisible(true);

    root.getChildren().addAll(this.gameMenu);

    Scene scene = new Scene(root);
    primaryStage.setScene(scene);
    primaryStage.show();


} // End start

private class GameMenu extends Parent {
    public GameMenu() throws Exception {
        BalikKariet m = new BalikKariet();
        VBox menu0 = new VBox(15);
        menu0.setTranslateX(650);
        menu0.setTranslateY(300);

        GameMenuCSS btn1 = new GameMenuCSS("Random Text");
        btn1.setOnMouseClicked(event -> {
            getChildren().addAll(m.zoberKartu().getObrazok());
        });

        menu0.getChildren().addAll(btn1);
        getChildren().addAll(menu0);
    } // End Const.



} // End GameMenu

public static class GameMenuCSS extends StackPane {
    private Text text;

    public GameMenuCSS(String text) {
        this.text = new Text(text);
        this.text.setFont(this.text.getFont().font(20));
        this.text.setFill(Color.WHITE);
        Rectangle bg = new Rectangle(250,30);
        bg.setOpacity(0.6);
        bg.setFill(Color.BLACK);

        GaussianBlur blur = new GaussianBlur(3.5);
        bg.setEffect(blur);

        setAlignment(Pos.CENTER);
        setRotate(-0.5);
        getChildren().addAll(bg, this.text);

        setOnMouseEntered(event -> {
            bg.setTranslateX(10);
            this.text.setTranslateX(10);
            bg.setFill(Color.WHITE);
            this.text.setFill(Color.BLACK);
        });

        setOnMouseExited(event -> {
            bg.setTranslateX(0);
            this.text.setTranslateX(0);
            bg.setFill(Color.BLACK);
            this.text.setFill(Color.WHITE);
        });

        DropShadow drop = new DropShadow(50, Color.WHITE);
        drop.setInput(new Glow());

        setOnMousePressed(event -> setEffect(drop));
        setOnMouseReleased(event -> setEffect(null));

    } // koniec konstruktora
} // koniec Triedy MenuPolosky



public static void main(String[] args) {
    launch(args);

}
}

第二类:

package com.sayky.test;

import javafx.embed.swing.SwingFXUtils;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

public class BalikKariet {
private Karta[] balik;
private int dalsiaKarta; // index nasledujucej karty
private ImageView imgViwVsetkyKarty;
private ImageView tempImageViewObrazokKarty;

public BalikKariet() throws IOException {
    int[] hodnota = {7, 8, 9, 10, 11, 12, 13, 14};
    String[] typKariet = {"7","8","9","10","Dolek","Horek","Kral","Eso"};
    String[] farbay = {"Zelen","Cervem","Gula","Zalud"};

    balik = new Karta[32];
    dalsiaKarta = 0;

    final int sirka = 74;
    final int vyska = 120;
    final int riadky = 4;
    final int stlpec = 8;

    BufferedImage vssetkyKartyObrazok = ImageIO.read(new     File("res/img/vsetkyKarty.png"));
    Image imgVsetkyKarty = SwingFXUtils.toFXImage(vssetkyKartyObrazok, null);
    imgViwVsetkyKarty = new ImageView(imgVsetkyKarty);
    BufferedImage tempObrazokKarty;


    for (int farba = 0; farba < 4 ; farba++){
        for (int typKarty = 0; typKarty < 8; typKarty++){
            //ukaz obrazok
            tempObrazokKarty = vssetkyKartyObrazok.getSubimage(
                    typKarty*sirka,     // zaciatok x suradnic
                    farba*vyska,        // zaciatok y sura dnic
                    sirka,              // sirka
                    vyska);             // vyska
            balik[(typKarty + (farba*8))] = new Karta(
                    farbay[farba],      // zavola Farby Array aby nadobudla meno Farba
                    typKariet[typKarty],
                    typKarty+7,         // pozicia 0+7 je 7 zacina na hodnote prvej karty
                    tempImageViewObrazokKarty);
            Image tempImgObrazokKarty = SwingFXUtils.toFXImage(tempObrazokKarty, null);
            tempImageViewObrazokKarty = new ImageView(tempImgObrazokKarty);
        }
    }

} // koniec konstruktora

public Karta zoberKartu(){
    if ( dalsiaKarta< balik.length) {
        return balik[dalsiaKarta++];
    } else {
        return null;
    }
}

}//科涅克优雅

第 3 类:

package com.sayky.test;

import javafx.scene.image.ImageView;

public class Karta {
private String typkarty; // cislo karty
private String farba; // telo
private int hodnota; // hodnota karty
private ImageView kartaObrazok;
/**
 *  Konstruktor pre PexesovaKarta triedu bude obsahovat toto ( pre lepsiu orientaciu )
 * @param farba -suit- "Zelen" "Cerven" "Gula" "Zalud"
 * @param typkarty -face- = 7, 8, 9, 10, Dolek, Horek, Kral, Eso;
 * @param hodnota = 7, 8, 9, 10, 11-dolek, 12-horek, 13-kral, 14-eso;
 */
public Karta(String farba, String typkarty, int hodnota, ImageView kartaObrazok) {
    // nastavenie hodnot lokalnich premien do globalnich
    this.farba = farba;
    this.typkarty = typkarty;
    this.hodnota = hodnota;
}
public String toString(){
    return typkarty + " " + farba;
}

public int getHodnotaKarty(){
    return hodnota;
}
public Karta getKarta() {
    return this;
}
public ImageView getObrazok() {
    return kartaObrazok;
}
}

Answer 1

Karta 类从不初始化 kartaObrazok 字段，因此 getObrazok() 返回 null。