[英]paintComponent isn't being called, can't get image variables to work
所以我知道我編程很爛,但是如果有人能給我一些代碼幫助,我將不勝感激,我不知道為什么我會收到這個錯誤
找不到標志
g.drawImage(movPic2, 35, 515, 200, 200,this); ^
symbol: variable movPic2
location: class MovieDis
如果any1可以給我一個代碼片段示例,我很難用文字理解。 厭倦了這個程序,只想完成它。
import java.awt.*;
import javax.swing.*;
import javax.swing.JComponent.*;
public class Movie extends JApplet {
private String movName1;
private String director1;
private int yearMade1;
private Image movPic1;
private String movName2;
private String director2;
private int yearMade2;
private Image movPic2;
private String movName3;
private String director3;
private int yearMade3;
private Image movPic3;
private String movName4;
private String director4;
private int yearMade4;
private Image movPic4;
public void init() {
MovieDis goo = new MovieDis(movPic1, movPic2, movPic3, movPic4);
goo.setBounds(0, 0, 750, 500);
add(goo);
}
}
class MovieDis extends JComponent {
private String movName1;
private String director1;
private int yearMade1;
private Image movPic1;
private String movName2;
private String director2;
private int yearMade2;
private Image movPic2;
private String movName3;
private String director3;
private int yearMade3;
private Image movPic3;
private String movName4;
private String director4;
private int yearMade4;
private Image movPic4;
public MovieDis(Image movPic1, Image movPic2, Image movPic3, Image movPic4) {
setBackground(Color.black);
movPic1 = Toolkit.getDefaultToolkit().createImage("Shaw.jpg");
movPic2 = Toolkit.getDefaultToolkit().createImage("dances.jpg");
movPic3 = Toolkit.getDefaultToolkit().getImage("Inception.jpg");
movPic4 = Toolkit.getDefaultToolkit().getImage("Cuckoo.jpg");
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.setColor(Color.black);
g.fillRect(0, 0, 750, 500);
g.drawImage(movPic1, 35, 35, 200, 200, this);
g.drawImage(movPic2, 35, 515, 200, 200, this);
g.drawImage(movPic3, 265, 35, 200, 200, this);
g.drawImage(movPic4, 35, 515, 200, 200, this);
}
}
變量movPic1
(和 2-4)未存儲在MovieDis
類中的任何位置。 這就是paintComponent()
方法抱怨的原因。 您需要將它們添加到MovieDis
,然后在類構造函數中分配它們。
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