Java - 未定義在Eclipse中的方法

Question

我目前有一個3類java應用程序，我正嘗試使用JavaFX創建一個簡單的遊戲。在我的GameCore類中，我試圖創建一個gameGrid的實例。但是當我使用「grid = new gameGrid（int，int，int，int）;」 eclipse告訴我gameGrid是未定義的，並建議我創建方法，當我按照eclipse的要求做時，它會在我的gameCore類中放置一個私有方法gameGrid，但gameGrid應該是gameGrid.class的構造方法。我已經重新啓動了這個項目並清理了這個項目，但是無濟於事。

public class gameCore { 

    gameGrid grid; 

    public gameCore(){ 
     getGrid(); 
    } 

    public void getGrid(){ 
     grid = gameGrid(32, 32, 10, 10); //Error is here, underlining "gameGrid" 
//Also using gameGrid.gameGrid(32,32,10,10); does not work either, still says its undefined 

/* 
This is the code that Eclipse wants to place when I let it fix the error, and it places this code in this class. 
private gameGrid gameGrid(int i, int j, int k, int l) { 
     // TODO Auto-generated method stub 
     return null; 
    } 
*/ 

    } 

} 

---

public class gameGrid { 

    protected int[][] grid; 
    protected int tileWidth; 
    protected int tileHeight; 

    public gameGrid(int tileWidth, int tileHeight, int horizTileCount, int vertTileCount){ 
     //Create Grid Object 

     grid = new int[vertTileCount][]; 
     for(int y = 0; y < vertTileCount; y++){ 
      for(int x = 0; x < horizTileCount; x++){ 
       grid[y] = new int[horizTileCount]; 
      } 
     } 

     this.tileWidth = tileWidth; 
     this.tileHeight = tileHeight; 
    } 
} 

---

import java.awt.Dimension; 
import javafx.application.Application; 
import javafx.scene.Scene; 
import javafx.scene.canvas.Canvas; 
import javafx.scene.layout.StackPane; 
import javafx.stage.Stage; 

public class gameGUI extends Application { 

    Dimension screenDimensions = new Dimension(java.awt.Toolkit.getDefaultToolkit().getScreenSize()); 

    public static void main(String[] args){ 
     launch(args); 
    } 

    public void start(Stage stage) throws Exception { 
     Canvas c = new Canvas(); 
     StackPane sp = new StackPane(); 
     Scene scene = new Scene(sp, screenDimensions.width, screenDimensions.height); 

     sp.getChildren().add(c); 
     stage.setScene(scene); 

     gameCore game = new gameCore(); 



     stage.show(); 


    } 

} 

Answer 1

你所缺少的是 「新」 的實例，我。即您需要編寫

grid = new gameGrid(32, 32, 10, 10); 

在Java類中以大寫字符開頭，您應該使用read the guidelines。

如果你想看到在JavaFX中用java節點而不是畫布完成的網格，你可以看看我最近問的問題the code。