java - 如何使用 imageArray 将每个单词的图像转换为另一个单词

Question

我制作了 5 个 Java 类，它们的目标是将英语翻译成法语，并设置当您单击 J 按钮时在 Jfield1 中写入的每个单词的图像。我的小程序可以将 JField1 中的每个英文单词翻译成 JField2 中的法语单词。我添加了两个类(ImageImplement 和 ImageInFrame)来设置图像但不幸的是没有任何作用。而且我真的不知道如何使用imageArray。请帮助我!!!

抱歉我的英语不太好。

这是我的小程序

我的第一个类是 StringArrayEnglishWord

公共(public)类 StringArrayEnglishWords 扩展 JPanel {

String[] names;
Graphics2D g2d;

public StringArrayEnglishWords(){
    EnglishWords();
    // drawNames();
}

public void paintComponent (Graphics g) {
    super.paintComponent(g);
    Graphics2D g2d = (Graphics2D) g;
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
}

public void EnglishWords(){

    names=new String[16];
    names[0]="Tomatoes";
    names[1]="Chairs";
    names[2]="Car";
    names[3]="Computer";
    names[4]="Flowers";
    names[5]="Family";
    names[6]="Sister";
    names[7]="Husband";
    names[8]="God";
    names[9]="Book";
    names[10]="Watch";
    names[11]="Pencil";
    names[12]="Bottle";
    names[13]="Map";
    names[14]="Wife";
    names[15]="Bag";


}

public void drawNames(){
    for (int i=0; i<names.length; i++){
        g2d.drawString(names[i], 50, (1+i)*16);
    }
}

   public int indexOfWord(String userInput)
{
    for(int i=0;i<names.length;i++)
    {
        if(userInput.equals(names[i])){return i;}

    }
    return -1;
}

}

我的第二个类(class)是 StringArrayFrenchWords:

公共(public)类 StringArrayFrenchWords 扩展 JPanel {

String[] names2;
Graphics2D g2d;

public StringArrayFrenchWords(){
    FrenchWorld();
    // drawNames();

}

public void paintComponent (Graphics g) {
    super.paintComponent(g);
    Graphics2D g2d = (Graphics2D) g;
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
}

public void FrenchWorld(){

    names2=new String[16];
    names2[0]="Tomate";
    names2[1]="Chaise";
    names2[2]="Voiture";
    names2[3]="Ordinateur";
    names2[4]="Fleurs";
    names2[5]="Familles";
    names2[6]="Soeur";
    names2[7]="Epoux, Mari";
    names2[8]="Dieu";
    names2[9]="Livre";
    names2[10]="Montre, Regarder";
    names2[11]="Crayon";
    names2[12]="Bouteille";
    names2[13]="Carte,plan";
    names2[14]="Femmme";
    names2[15]="Sac";


}
public void drawNames(){
    for (int i=0; i<names2.length; i++){
        g2d.drawString(names2[i], 50, (1+i)*16);
    }
}

}

我的第三个类(class)是扩展 Japplet(翻译者):

公共(public)类 Translator 扩展 JApplet 实现 ActionListener {

String StringField1, StringImage;
StringArrayEnglishWords Englishw;
StringArrayFrenchWords Frenchw;

ImageInJframe img;
ImageImplement Images;
Image Image;

JButton[] buttons;
JComboBox[] comboBoxes;
JButton TranslateButton;


JPanel JPanel0,JPanel1;
JPanel buttonPanel;
JPanel comboBoxesPanel;
JTextField field1,field2;
ImageIcon Imageicon;
JLabel ImageLabel;


public void init(){

    setUpFields();

    Englishw=new StringArrayEnglishWords();
    Frenchw=new StringArrayFrenchWords();
    img = new ImageInJframe(); // this was for set up the image
    setUpimages();// for setup image too
}


public  void setUpFields() {
    TranslateButton = new JButton("TranslateButton");
    field1 = new JTextField(10);

    field2 = new JTextField(10);
    field2.setEditable(false);


    JPanel0 = new JPanel(new FlowLayout());

    JPanel0.add(field1);

    TranslateButton.addActionListener(this);

    field1.addActionListener(this);

    field2.addActionListener(this);

    JPanel0.add(TranslateButton);

    JPanel0.add(field2);


    add(JPanel0, BorderLayout.SOUTH);

}
public void paint(Graphics g) {
    super.paint(g);

    Graphics2D g2d = (Graphics2D) g;
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
            RenderingHints.VALUE_ANTIALIAS_ON);


}


public void setUpimages() {//setUp images too

    ImageLabel.setIcon((Icon) img);

    JPanel1 = new JPanel(new FlowLayout());


    JPanel1.add(ImageLabel);

    add(JPanel1, BorderLayout.CENTER);


}


@Override
public void actionPerformed(ActionEvent e) {

    if (e.getSource() == TranslateButton) {

        System.out.println(field1);
        StringField1 = field1.getText();

        int index = Englishw.indexOfWord(StringField1);//this will give you the index of the word
        if (index == -1) {
            field2.setText("Word not found.");
            System.out.println(field2);

        } else {
            field2.setText(Frenchw.names2[index]);
            System.out.println("English Words=" + field1.getText());
            System.out.println("French Words =" + field2.getText());

            //setup Image
            Image = img.getIconImage();
            int index2 = img.indexOfImage(StringImage);
            JPanel1.add(img);


        }
    }
}

}

我的两个类用于使用 JFame 和 imageArray 设置图像:ImageInJframe 和 ImageImplement

公共(public)类 ImageInJframe 扩展 JFrame {

JFrame Frame;


Image[] pics;
String[] names = {"apple.jpg", "bags.jpg", "bathroom.jpg", "battled.jpg", "car.png",
        "chairs.jpg", "Computer.jpg", "family.jpg", "flowers.jpg", "god.jpg", "house.png", "map.jpg"
        , "men.jpg", "pencil.jpg", "sisters.jpg", "tomato.jpg", "watch.jpg", "women.jpg", "book.gif"};
final int NUM_PICS=names.length;
Graphics g;


public static void main(String args[])
{
    new ImageInJframe().start();
}


public void start()
{
    ImageImplement panel = new ImageImplement(new ImageIcon(String.valueOf(pics)).getImage());
    add(panel);
    setVisible(true);
    setSize(400,400);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setImage();
}

public void setImage() {


    pics = new Image[NUM_PICS];

}


public int indexOfImage(String userInput)
{
    for(int i=0;i<pics.length;i++)
    {
        if(userInput.equals(pics[i])){return i;}

    }
    return -1;
}

}

ImageImplement 扩展 JPanel:

公共(public)类 ImageImplement 扩展 JPanel {

Image img;


public ImageImplement(Image img) {
    this.img = img;
    Dimension size = new Dimension(img.getWidth(null), img.getHeight(null));
    setPreferredSize(size);
    setMinimumSize(size);
    setMaximumSize(size);
    setSize(size);
    setLayout(null);
}

public void paintComponent(Graphics g) {
    g.drawImage(img, 0, 0, null);
}

Answer 1

当您的 paintComponent 时，绘画会按需发生。被调用时，您需要重新绘制 UI 的当前状态。也许您应该首先看一下 Painting in AWT and Swing和 Performing Custom Painting有关绘画工作原理的更多详细信息

基本上，来自您的paintComponent ，您需要调用draw ，但您应该将 Graphics 传递给它传递给 paintComponent 的上下文方法。维持对 Graphics 的引用是危险且不明智的。您没有创建的上下文

import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class Test {

    public static void main(String[] args) {
        new Test();
    }

    public Test() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(new StringArrayEnglishWords());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class StringArrayEnglishWords extends JPanel {

        String[] names;

        public StringArrayEnglishWords() {

            EnglishWords();

        }

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(400, 400);
        }

        @Override
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);
            Graphics2D g2d = (Graphics2D) g.create();
            g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            drawNames(g2d);
            g2d.dispose();
        }

        public void EnglishWords() {

            names = new String[16];
            names[0] = "Tomatoes";
            names[1] = "Chairs";
            names[2] = "Car";
            names[3] = "Computer";
            names[4] = "Flowers";
            names[5] = "Family";
            names[6] = "Sister";
            names[7] = "Husband";
            names[8] = "God";
            names[9] = "Book";
            names[10] = "Watch";
            names[11] = "Pencil";
            names[12] = "Bottle";
            names[13] = "Map";
            names[14] = "Wife";
            names[15] = "Bag";

        }

        public void drawNames(Graphics2D g2d) {
            for (int i = 0; i < names.length; i++) {
                g2d.drawString(names[i], 50, (1 + i) * 16);
            }
        }

        public int indexOfWord(String userInput) {
            for (int i = 0; i < names.length; i++) {
                if (userInput.equals(names[i])) {
                    return i;
                }

            }
            return -1;
        }

    }
}

修改Graphics时也应该小心。上下文中，它由同一窗口内的所有组件共享，在大多数情况下，我发现拍摄 Graphics 的快照很有用。 context ( Graphics#create ) 并使用它，那么我不需要记住在完成后重置它。

小程序也是一种死技术，该插件已被弃用，不再受支持，并且在大多数情况下，被大多数浏览器主动阻止。请参阅Java Plugin support deprecated和 Moving to a Plugin-Free Web了解更多详情

已更新

改变...

ImageImplement panel = new ImageImplement(new ImageIcon(String.valueOf(pics)).getImage());
add(panel);

到...

JLabel panel = new JLabel(new ImageIcon(names[0]).getImage());
add(panel);

假设图像文件位于执行程序的当前目录中，那么它应该可以工作。如果它们包含在带有类文件的包中，那么您需要使用 Class#getResource获取对图像的引用并传递结果 URL至ImageIcon

您的ImageImplement面板没有执行任何操作，因此即使它有正确的图像可以显示，它也不会显示任何内容。

String.valueOf(pics)完全没有意义

您发布了一大堆看似不相关的代码，很难知道您指的是什么问题

这个...

ImageLabel.setIcon((Icon) img);

毫无意义，img是 ImageInJFrame 的一个实例，这与 Icon 有什么关系呢？ ？

我完全不知道你想做什么