如何使用imageArray

时间：2016-04-09 08:08:59

标签： java arrays swing

我创建了5个java类，他们的目标是将英语翻译成法语，并在单击Jbutton时设置在Jfield1中写入的每个单词的图像。 我的小程序到达将JField1中写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）来设置图像但遗憾的是没有任何工作。我真的不知道如何使用imageArray。 请帮帮我!!!

对不起，我的英语不太好。

这是我的应用

我的第一堂课是StringArrayEnglishWord

public class StringArrayEnglishWords扩展了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;
}

}

我的第二个类是StringArrayFrenchWords：

public class StringArrayFrenchWords扩展了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Classe是扩展Japplet（译者）：

public class Translator extends JApplet实现了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);


        }
    }
}

}

我的两个课程是使用JFame和imageArray设置图像：ImageInJframe和ImageImplement

公共类ImageInJframe扩展了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：

公共类ImageImplement扩展了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);
}

1 个答案:

答案 0 :(得分：2)

根据需要进行绘制，当调用paintComponent时，您需要重新绘制UI的当前状态。也许你应该首先看看Painting in AWT and Swing和Performing Custom Painting，了解有关绘画如何运作的更多信息

基本上，在paintComponent，您需要致电draw，但您应该将传递给Graphics方法的paintComponent上下文传递给它。保持对您未创建的Graphics上下文的引用是危险且不明智的

Text 

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;
        }

    }
}

在修改Graphics上下文时也应该小心，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{{1}的快照很有用} context（Graphics）并使用它，然后我不需要记得在我完成后重置它。

Applet也是一种死技术，该插件已被弃用，不再受支持，在大多数情况下，大多数浏览器都会主动阻止该插件。有关详细信息，请参阅Java Plugin support deprecated和Moving to a Plugin-Free Web

<强>更新

更改... 

Graphics#create

为... 

ImageImplement panel = new ImageImplement(new ImageIcon(String.valueOf(pics)).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。如果它们包含在包含类文件的包中，那么您需要使用JLabel panel = new JLabel(new ImageIcon(names[0]).getImage()); add(panel); 获取对图像的引用，并将生成的Class#getResource传递给URL

您的ImageIcon面板什么都不做，所以即使它有适当的图像显示，它也不会显示任何内容。

ImageImplement毫无意义

你发布了一大堆，似乎是不相关的代码，很难知道你指的是什么问题

此... 

String.valueOf(pics)

没有意义，ImageLabel.setIcon((Icon) img); 是img的一个实例，它与ImageInJFrame甚至有什么关联？

我正式不知道你要做什么

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