Nullpointerexception whith Color class

Question

private void drawSquare (Graphics g, int row, int col,
        Tetrominoes shape){

    Color[] colors={new Color(0,0,0), new Color(204,102,102),
            new Color(102,204,102), new Color(102,102,204),
            new Color(204,204,102), new Color(204,102,204),
            new Color(102,204,204), new Color(218,170,0)
    };
    int x = col * squareWhidth();
    int y = row * squareHeight();
    Color color = colors[shape.ordinal()];  // **** NullPointerException here ****
    g.setColor(color);
    g.fillRect(x + 1, y + 1, squareWhidth() - 2,
    squareHeight() - 2);
    g.setColor(color.brighter());
    g.drawLine(x, y + squareHeight() - 1, x, y);
    g.drawLine(x, y, x + squareWhidth() - 1, y);
    g.setColor(color.darker());
    g.drawLine(x + 1, y + squareHeight() - 1,
    x + squareWhidth() - 1, y + squareHeight() - 1);
    g.drawLine(x + squareWhidth() - 1,
    y + squareHeight() - 1,
    x + squareWhidth() - 1, y + 1);
}

Throws me a nullpointerexception when I run the program and the terminal reference me in this line: Color color = colors[shape.ordinal()];

And how are you calling `drawSquare (...)`? Are you passing a null reference into its arguments when calling it? Is shape null? And where are you calling it? — Hovercraft Full Of Eels, May 01 '15 at 21:44

score 2 · Answer 1 · answered May 01 '15 at 21:49

If the NullPointerException incriminates this line: Color color = colors[shape.ordinal()];then it logically implies that your shape object is null at that point. You should debug the call to drawSquare and check what shapeobject the calling method is passing into it.

Nullpointerexception whith Color class

1 Answers1