Question

我还是Java新手。我从我的方法中检索RGB像素值时遇到了麻烦，compareHexaRGB在这种方法中，我可以根据2个相似图像的比较得到不同的像素值。我尝试了printString2DArray方法，但它不起作用。它声明了不兼容的类型：String [] []无法转换为String []或产生错误，如[[Ljava.lang.String; @ 6d09a8df

获取值后，我想将其合并为一个Hex值，然后将其转换为ASCII字符。我无法继续这个过程，因为检索值无法正常工作。

以下是compareHexaRGB（）方法的代码：

public class compareHexaRGB
{
 private static int w;
 private static int h;
 private static BufferedImage img;
 private static BufferedImage img2;
 private static String[][] check_hex2;
 private static String[][] check_hex4;
 private static String[][] message;

 public static void compareHexaRGB(BufferedImage image, BufferedImage image2, int width, int height) throws IOException
{
w = width;
h = height;
img = image;
img2 = image2;

}

public void check() throws IOException
{
    getPixelRGB1 pixel = new getPixelRGB1();
    getPixelData1 newPD = new getPixelData1();

    int[] rgb;
    int count = 0;

    int[][] pixelData = new int[w * h][3];
    check_hex2 = new String[w][h];
    check_hex4 = new String[w][h];

    for(int i = 0; i < w; i++) 
    {
        for(int j = 0; j < h; j++)
        {
            rgb = newPD.getPixelData(img, i, j);

            for(int k = 0; k < rgb.length; k++)
            {
                pixelData[count][k] = rgb[k];
            }

                if(pixel.display_imgHex2()[i][j].equals(pixel.display_img2Hex2()[i][j]))
                {
                    System.out.println("\nPixel values at position 2 are the same." + "\n" + pixel.display_imgHex2()[i][j] + "  " + pixel.display_img2Hex2()[i][j]);
                }
                if(pixel.display_imgHex4()[i][j].equals(pixel.display_img2Hex4()[i][j]))
                {
                    System.out.println("\nPixel values at position 4 are the same." + "\n" + pixel.display_imgHex4()[i][j] + "  " + pixel.display_img2Hex4()[i][j]);
                }
                if(!pixel.display_imgHex2()[i][j].equals(pixel.display_img2Hex2()[i][j]))
                {
                    System.out.println("\nPixel values at position 2 are not the same." + "\n" + pixel.display_imgHex2()[i][j] + "  " + pixel.display_img2Hex2()[i][j]);
                    check_hex2[i][j] = pixel.display_img2Hex2()[i][j];
                    System.out.println("\nOutput Hex 2: " + check_hex2[i][j]);
                }
                if(!pixel.display_imgHex4()[i][j].equals(pixel.display_img2Hex4()[i][j]))
                {
                    System.out.println("\nPixel values at position 4 are not the same." + "\n" + pixel.display_imgHex4()[i][j] + "  " + pixel.display_img2Hex4()[i][j]);
                    check_hex4[i][j] = pixel.display_img2Hex4()[i][j];
                    System.out.println("\nOutput Hex 4: " + check_hex4[i][j]);
                }
                if(!pixel.display_imgHex2()[i][j].equals(pixel.display_img2Hex2()[i][j]) || (!pixel.display_imgHex4()[i][j].equals(pixel.display_img2Hex4()[i][j])))
                {
                    System.out.println("\nOne of the pixel values at position 2 and 4 are not the same." + "\n" + pixel.display_imgHex2()[i][j] + "  " + pixel.display_img2Hex2()[i][j] + "\n" + pixel.display_imgHex4()[i][j] + "  " + pixel.display_img2Hex4()[i][j]);

                    if(!pixel.display_imgHex2()[i][j].equals(pixel.display_img2Hex2()[i][j]) || (pixel.display_imgHex2()[i][j].equals(pixel.display_img2Hex2()[i][j])))
                    {
                        check_hex2[i][j] = pixel.display_img2Hex2()[i][j];
                        System.out.println("\nOutput Hex 2: " + check_hex2[i][j]);
                    }

                    if(!pixel.display_imgHex4()[i][j].equals(pixel.display_img2Hex4()[i][j]) || (pixel.display_imgHex4()[i][j].equals(pixel.display_img2Hex4()[i][j])))
                    {
                        check_hex4[i][j] = pixel.display_img2Hex4()[i][j];
                        System.out.println("\nOutput Hex 4: " + check_hex4[i][j]);
                    }

                }
            count++;
            System.out.println("\nOutput Count: " + count);
        }

    }

}

public String[][] getCheck_hex2()
{
    return check_hex2;
}

public String[][] getCheck_hex4()
{
    return check_hex4;
}
}

extractMessage（）方法的代码：

public class extractMessage
{
private static String character;
private static String[][] char1;
private static String[][] char2;
private static int w;
private static int h;

public static void printString2DArray(String[][] inn) 
{
    for (int i = 0; i < inn.length; i++) 
    {
        for(int j = 0; j < inn[i].length; j++)
        {
            if (i != 0 && j == 0)
            {
                System.out.print(" ");
            }
            System.out.println(inn[i][j]);
        }
    }
}

public static void charExtract()
{
compareHexaRGB hexRGB = new compareHexaRGB();

char1 = hexRGB.getCheck_hex2();

    System.out.println("Char 1: ");
    printString2DArray(char1);

}

public String convertHexToString()
{
StringBuilder sb = new StringBuilder();
StringBuilder temp = new StringBuilder();

extractMessage extract = new extractMessage();
extract.charExtract();

for(int i = 0; i < extract.length(); i+=2) //error stated couldn't find symbol extract
{
String output = extract.substring(i, (i + 2));
int decimal = Integer.parseInt(output, 16);
sb.append((char)decimal);

temp.append(decimal);
}
return sb.toString();
}
}

我会很感激的任何帮助！

编辑：我现在更改了代码。输出就是这样产生的。

Char 1: 
null
null
null
null
null
null
null
null
6
6
null
null
6
null
null
null
null
null

不应该那样输出吗？我不想要null字符，但我只想要值。那我该怎么办？

Answer 1

您的printString2DArray方法应如下所示：

private static void printString2DArray(String[][] in)
{
    for (int i = 0; i < in.length; i++) {
        for (int j = 0; j < in[i].length; j++) {
            if (i != 0 && j == 0) {  // This is just formatting (you may want to change it)
                System.out.print(", ");
            }
            System.out.print(in[i][j]);
        }
    }
}

要迭代数组String[][]，您可以使用2个索引（i和j），因为它是一个二维数组。

修改

而不是：

char1 = new String[][] { new String[] { hexRGB.getCheck_hex2() } //error stated incompatible types };
你可以尝试：

char1 = hexRGB.getCheck_hex2();

想从另一个方法检索RGB像素值但无法检索它

1 个答案: