Java的矩形陣列90空指針

-2

我不能出去明白這一個...所以我不斷收到異常螺紋Java的矩形陣列90空指針

AWT-EventQueue-0" java.lang.NullPointerException 
    at MakeFrame.MovementAndObjects.paint(MovementAndObjects.java:285)

錯誤在我的代碼，但沒有空指針，我可以找到！我的矩形後面的數組是公開的，我只是試圖傳遞我無法從中引用的數組簡單對象。

void defineObjects(){ 
     character = new Player("Zander", true, 10, 1, 1, 1, 1, "none", "none"); 
     charRect = new Rectangle(character.charX, character.charY,character.charWidth,character.charHeight);//y==about 500, x= whatever the x is currently set at 
     floor1 = new Rectangle(-1, 660, 1201, 10); 
     floor2 = new Rectangle (-1, 550, 1201, 10); 
     floor3 = new Rectangle(-1, 440, 1201, 10); 
     floor4 = new Rectangle (-1, 330, 1201, 10); 
     floor5 = new Rectangle(-1, 220, 1201, 10); 
     floor6 = new Rectangle (-1, 110, 1201, 10); 
     wallA = new Rectangle(0,660,-700,12); 
     wallB = new Rectangle(1182,660,-700,12); 
     latter[0]=new Rectangle(1120,560,35,101); 
     latter[1]= new Rectangle(100,450,35,101); 
     latter[2]=new Rectangle(400,340,35,101); 
     latter[3]= new Rectangle(20,340,35,101); 
     latter[4]=new Rectangle(800,230,35,101); 
     latter[5]= new Rectangle(100,230,35,101); 
     latter[6]=new Rectangle(600,450,35,101); 
     latter[7]= new Rectangle(500,120,35,101); 
     latter[8]=new Rectangle(700,120,35,101); 
     objectDefine=true; 

     repaint(); 
} 




@Override 
public void paint(Graphics g) 
{ 
    super.paint(g); 
    if(objectDefine) 
    { 

     /*========== 
     =THE FLOORS= 
     ==========*/ 
     latter[0]=latter1; 
     g.setColor(myBarf);//floor 
     g.setColor(myBrown);//floor 
     g.fillRect(floor1.x, floor1.y, floor1.width, floor1.height); 
     g.fillRect(floor2.x, floor2.y, floor2.width, floor2.height); 
     g.fillRect(floor3.x, floor3.y, floor3.width, floor3.height); 
     g.fillRect(floor4.x, floor4.y, floor4.width, floor4.height); 
     g.fillRect(floor5.x, floor5.y, floor5.width, floor5.height); 
     g.fillRect(floor6.x, floor6.y, floor6.width, floor6.height); 
     /*========== 
     =THE WALLS= 
     ==========*/ 
     g.setColor(Color.red); 
     g.fillRect(wallA.x,wallA.y,wallA.height,wallA.width); 
     g.fillRect(wallB.x,wallB.y,wallB.height,wallB.width); 
     /*=========== 
     =THE lATTERS= 
     ===========*/ 
     for(int i=0; i<=latter.length; i++) 
     { 
      g.setColor(myBrown3); 
      g.fillRect(latter[i].x, latter[i].y, latter[i].width, latter[i].height);<---- this is the bad line of code according the the error message 
      g.setColor(Color.BLACK); 
      System.out.println("D1 complete!!!"); 
      for(int j=5; j<=80; j+=15) 
      { 
       g.fillRect(latter[i].x+9 ,latter[i].y+j, latter[i].width/2, latter[i].height/10); 
      } 
     }

有沒有想過？我已初始化它幾種不同的方式，這是我試圖當前之一：

public Rectangle[] latter= { 
    new Rectangle(1120,560,35,101), 
    new Rectangle(100,450,35,101), 
    new Rectangle(400,340,35,101), 
    new Rectangle(20,340,35,101), 
    new Rectangle(800,230,35,101), 
    new Rectangle(100,230,35,101), 
    new Rectangle(600,450,35,101), 
    new Rectangle(100,230,35,101), 
    new Rectangle(700,120,35,101) 
};

IV也做標準矩形[]後者=新的Rectangle; [8]在分配後

來源

2017-02-25 Zander

怎麼樣'latter1'？它可以是空嗎？ –

所有後者，0-8，都是矩形。我可以給他們打電話的陣列之外，而不是通過引用數組 – Zander

爲什麼ü需要排隊850指數...我只有300行的東西... – Zander

在fori<=latter.length似乎不正確，應該是i < latter.length（記住，如果長度爲9，那麼你可以訪問該元素是從0到8）。但是，這應該引起IndexOutOfBoundsException而非NullPointerException。

小心與陣列尺寸的latter正確的初始化，例如應Rectangle[] latter = new Rectangle[9];，所以9而不是8爲您發佈。

來源

2017-02-25 23:44:48

Java的矩形陣列90空指針

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