[英]paintComponent isn't being called, can't get image variables to work
所以我知道我编程很烂,但是如果有人能给我一些代码帮助,我将不胜感激,我不知道为什么我会收到这个错误
找不到标志
g.drawImage(movPic2, 35, 515, 200, 200,this); ^
symbol: variable movPic2
location: class MovieDis
如果any1可以给我一个代码片段示例,我很难用文字理解。 厌倦了这个程序,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);
}
}
变量movPic1
(和 2-4)未存储在MovieDis
类中的任何位置。 这就是paintComponent()
方法抱怨的原因。 您需要将它们添加到MovieDis
,然后在类构造函数中分配它们。
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