JLabel 从我的鼠标指针坐标吸收背景 JAVA

Question

代码如上。这是一个 class，在 window 的左边有分数等。每次我移动光标时，它都会在计时器下显示不同的 "background" 我不知道为什么。这个Timer Label在JPanel no左边，有一部分是透明的。如何去掉timer下的这个垃圾。

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SpringLayout;
import javax.swing.Timer;
import javax.swing.SwingConstants;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

 public class TablePointPanel extends JPanel implements ActionListener{

private int score;
 private static final long serialVersionUID = 1L;
 final public JLabel Score;
final public JLabel PointLabel;
final public JLabel LevelLabel;
private JLabel TimeLabel;
int second=0;
int sets=0;
int minutes=0;
int time=0;
String BufferedTime="";
String Bufferedminutes="";
String Bufferedseconds="";
Timer timeMeasure;

 public TablePointPanel() {



    ImageIcon iconLogo = new ImageIcon("res\score.png");
    Score = new JLabel();
    Score.setForeground(Color.BLACK);
    Score.setHorizontalAlignment(JLabel.CENTER);
    Score.setVerticalAlignment(JLabel.CENTER);
    Score.setFont(Score.getFont().deriveFont(10.0f));
    //Score.setText("PUNKTY");
    Image img = iconLogo.getImage();
       Image newimg = img.getScaledInstance(80,80, java.awt.Image.SCALE_SMOOTH);
       iconLogo = new ImageIcon(newimg);
    Score.setIcon(iconLogo);

     PointLabel = new JLabel();

    PointLabel.setForeground(Color.BLACK);
    PointLabel.setHorizontalAlignment(JLabel.CENTER);
    PointLabel.setVerticalAlignment(JLabel.CENTER);
    PointLabel.setFont(PointLabel.getFont().deriveFont(16.0f));
    PointLabel.setText(score+"");

    LevelLabel = new JLabel();


         LevelLabel.setForeground(Color.BLACK);

         LevelLabel.setFont(new Font("Tahoma", Font.BOLD, 10));

         LevelLabel.setText(" Runda I");
    SpringLayout springLayout = new SpringLayout();
    springLayout.putConstraint(SpringLayout.NORTH, LevelLabel, 30, SpringLayout.SOUTH, PointLabel);
    springLayout.putConstraint(SpringLayout.SOUTH, LevelLabel, -200, SpringLayout.SOUTH, this);
    springLayout.putConstraint(SpringLayout.EAST, LevelLabel, 8, SpringLayout.EAST, Score);
    springLayout.putConstraint(SpringLayout.NORTH, PointLabel, 6, SpringLayout.SOUTH, Score);
    springLayout.putConstraint(SpringLayout.WEST, PointLabel, -7, SpringLayout.WEST, Score);
    springLayout.putConstraint(SpringLayout.SOUTH, PointLabel, 45, SpringLayout.SOUTH, Score);
    springLayout.putConstraint(SpringLayout.EAST, PointLabel, 5, SpringLayout.EAST, Score);
    springLayout.putConstraint(SpringLayout.WEST, LevelLabel, 5, SpringLayout.WEST, Score);
    springLayout.putConstraint(SpringLayout.NORTH, Score, -3, SpringLayout.NORTH, this);
    springLayout.putConstraint(SpringLayout.EAST, Score, 70, SpringLayout.WEST, this);
    springLayout.putConstraint(SpringLayout.WEST, Score, 6, SpringLayout.WEST, this);
    springLayout.putConstraint(SpringLayout.SOUTH, Score, 80, SpringLayout.NORTH, this);
    setLayout(springLayout);
    this.add(Score);
    this.add(PointLabel);
    this.add(LevelLabel);
    timeMeasure = new Timer(1000,this);
    TimeLabel = new JLabel("00:00");
    TimeLabel.setHorizontalAlignment(SwingConstants.CENTER);
    springLayout.putConstraint(SpringLayout.NORTH, TimeLabel, 6, SpringLayout.SOUTH, LevelLabel);
    springLayout.putConstraint(SpringLayout.WEST, TimeLabel, 0, SpringLayout.WEST, Score);
    springLayout.putConstraint(SpringLayout.SOUTH, TimeLabel, 26, SpringLayout.SOUTH, LevelLabel);
    springLayout.putConstraint(SpringLayout.EAST, TimeLabel, -3, SpringLayout.EAST, Score);
    TimeLabel.setOpaque(false);
    add(TimeLabel);



}

public void setPoint(int x)
    {
score=x;
}
public void resetPoint()
{
    score=0;
}
public void resetTime()
{

    minutes=0;
    second=-1;
    time=0;
}
public int GetTime(){return time;}
 public void updateDisplay(int millis)
    {
    // repaint();
        try
        {
            Thread.sleep(millis);
        }
        catch(InterruptedException e)
        {
        }
    }


 public void paintComponent(Graphics g)
    {

     Image left = new ImageIcon("res\transparent\ROCK.png").getImage();
     g.drawImage(left, 0, 0, this.getWidth(), this.getHeight(), null);



    }

@Override
public void actionPerformed(ActionEvent e) {

    time+=1;
    second+=1;
    if(second==60)
    {

        second=0;
        minutes=1;
    }
    if(second<10)
    Bufferedseconds="0"+second;
    else
    Bufferedseconds=second+"";
    if(minutes<10)
    Bufferedminutes="0"+minutes;
    else
    Bufferedminutes=minutes+"";
    BufferedTime=Bufferedminutes+":"+Bufferedseconds;
    TimeLabel.setText(BufferedTime);

}

}

Answer 1

变量名不应以大写字符开头。您的一些变量是正确的，而另一些则不是。保持一致！！！
绘画方法仅供绘画使用。不要在画法中做I/O。构建class时应该读取图像。
不要仅仅为了读取图像而创建 ImageIcon。相反，您可以使用 ImageIO.read(...)
做自定义绘画时不要忘记调用super.paintComponent()。这将确保在绘制图像之前清除背景，以免出现绘制伪影。

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