找不到符號方法drawImage（SlidingBlockModel，int，int，int，int，<nulltype>）

我正在嘗試製作滑塊遊戲。在這個類中，我使用drawImage方法來顯示「拼圖」的塊，使用Graphics對象g2的drawImage方法。但在paint class方法中，我得到這個錯誤：找不到符號方法drawImage（SlidingBlockModel，int，int，int，int，）。有什麼建議麼？我很感謝你在閱讀本文時的時間。先謝謝你。 :)找不到符號方法drawImage（SlidingBlockModel，int，int，int，int，<nulltype>）

ZOI

的代碼如下：

import java.awt.*; 
import java.awt.geom.*; 
import javax.swing.*; 
import java.awt.event.MouseListener; 
import java.awt.event.MouseEvent; 
import java.awt.image.*; 
import java.awt.Graphics.*; 

class SlidingBlockPanel extends JPanel implements MouseListener 
{ 
int numCols; 
int numRows; 

SlidingBlockModel SBModel; 

public static void main(String[] args) 
{ 
    SlidingBlockFrame w = new SlidingBlockFrame(); 
    w.setVisible(true); 
} 


public SlidingBlockPanel(int nc, int nr) 
{ 
    numCols = nc; 
    numRows = nr; 
    addMouseListener(this); 
    SBModel= new SlidingBlockModel(numCols, numRows, "puzzle.jpg"); 
} 
int getCol(int x) 
{ 
    return x*numCols/getWidth(); 
} 
int getRow(int y) 
{ 
    return y*numRows/getHeight(); 
} 

public void mouseReleased(MouseEvent event) 
{ 
} 
public void mousePressed(MouseEvent event) 
{ 
} 
public void mouseClicked(MouseEvent event) 
{ 
    int thisCol = getCol(event.getX()); 
    System.out.println 
    ("you clicked in column " + thisCol); 

} 
public void mouseEntered(MouseEvent event) 
{ 
} 
public void mouseExited(MouseEvent event) 
{ 
} 


Rectangle getRect(int thisCol, int thisRow) 
{ 
    // if input is out of range, return "null" 
    if(thisCol <0 || thisRow < 0) 
     return null; 
    if(thisCol>=numCols || thisRow>=numRows) 
     return null; 

    // otherwise, make and return the Rectangle 
    int w = getWidth()/numCols; 
    int h = getHeight()/numRows; 

    int x = thisCol*w; 
    int y = thisRow*h; 

    Rectangle myRect = new Rectangle(x,y,w,h); 
    return myRect; 
} 

public void paint(Graphics g) 
{ 
    g.setColor(Color.gray); 
    g.fillRect(0,0,getWidth(), getHeight()); 
    g.setColor(Color.black); 


    Graphics2D g2 = (Graphics2D)g; 
    // we'll use Graphics2D for it's "drawImage" method this time 

    for (int i = 0;i<numCols;i++) 
    { 
     for(int j = 0;j<numRows;j++) 
     { 

      SBModel.getSubimage(i, j); 
      Rectangle r = getRect(i, j); 
      g2.drawImage(SBModel,r.x,r.y,r.width,r.height,null); 


     } 
    } 

} 


}

來源

2011-03-12 Zoe Marmara