SunGraphics2D.java 文件源码

public void drawChars(char data[], int offset, int length, int x, int y) {

        if (data == null) {
            throw new NullPointerException("char data is null");
        }
        if (offset < 0 || length < 0 || offset + length > data.length) {
            throw new ArrayIndexOutOfBoundsException("bad offset/length");
        }
        if (font.hasLayoutAttributes()) {
            if (data.length == 0) {
                return;
            }
            new TextLayout(new String(data, offset, length),
                           font, getFontRenderContext()).draw(this, x, y);
            return;
        }

        try {
            textpipe.drawChars(this, data, offset, length, x, y);
        } catch (InvalidPipeException e) {
            try {
                revalidateAll();
                textpipe.drawChars(this, data, offset, length, x, y);
            } catch (InvalidPipeException e2) {
                // Still catching the exception; we are not yet ready to
                // validate the surfaceData correctly.  Fail for now and
                // try again next time around.
            }
        } finally {
            surfaceData.markDirty();
        }
    }