Java

Question

我是一个完全的新手，所以也许问题很明显：问题是我正在制作程序（JAVA，处理），它给我每个中的 R、G、B 的数量图片上选定的像素（每十行中的每个像素）。当我通过控制台打印输出时，它可以完美地处理所有数据，直到最后一行的 250 像素出现（图片宽度为 251），但是当我将其写入文件时，它会将数据剪切为 235 像素 - 剩下的 15 像素不是写下来。是缓冲存储器的问题吗？我怎样才能写入所有数据？这是代码：

PrintWriter output;

void setup()

{
 output = createWriter("positions.txt");     //writedown tool enter
  size(251,201);                             // screen size setup
  PImage img = loadImage("sharp.jpg");       // implementing image Sketch->Add File
  image(img,0,0);                            // placeing the img on the screen
  loadPixels();                              // work on pixels

  for(int s=0; s < pixels.length; s=s+9*width)    // go through selected rows of pixels with intervals of 10 rows (0 to 0+9width)
  {
    for(int j=0; j < width; j++)               // go through each pixel in selected row
    {
    float r=red(pixels[s+j]);                  // read the red value from each chceked pixel
    float b=blue(pixels[s+j]);                 // read the blue value from each chceked pixel
    float g=green(pixels[j+s]);                // read the green value from each checked pixel

   output.println(j + " , "+ s +" , "+ r + " , " + g + " , " + b);  //write the data down to the file (selected data)

   color black = color(0, 0, 0);                              // checking, set a black color
   pixels[j+s]=black;                                         // checking, change the color of current pixel

  println(j + " , "+ s +" ; "+ r + " , " + g + " , " + b);    // print the read data

    }
    }
updatePixels();                                // set changes
}

void keyPressed()
{
output.flush();  // Writes the remaining data to the file
 output.close();  // Finishes the file
  exit();  // Stops the program
}

Answer 1

你试过在 updatePixels(); 之前写 output.flush(); 吗？

Answer 2

好的，感谢楼上的帮助。现在我必须更深入地研究这个，我希望程序也给我一个 CSV 文件，其中包含 table 的这种聚合：第一列将是测试图片上的 y 位置，第一行是 x 位置（逐个像素），下一行是 R 值，然后是 G，然后是 B。问题是我已经将它放入循环中以使其自动完成但我再次堆叠 - ArrayIndexOutOfBoundsException 我不该有的东西。这是代码： PrintWriter 输出；

Table Tabela;
String i;
void setup()

{
 output = createWriter("positions.txt");     //writedown tool enter
 Tabela=new Table();
  size(251,201);                             // screen size setup
  PImage img = loadImage("sharp.jpg");       // implementing image Sketch->Add File
  image(img,0,0);                            // placeing the img on the screen
  loadPixels();                              // work on pixels

  for(int s=0; s < pixels.length; s=s+9*width)    // go through selected rows of pixels with intervals of 10 rows (0 to 0+9width)
  {
    for(int j=0; j < width; j++)               // go through each pixel in selected row
    {
    float r=red(pixels[s+j]);                  // read the red value from each chceked pixel
    float b=blue(pixels[s+j]);                 // read the blue value from each chceked pixel
    float g=green(pixels[j+s]);                // read the green value from each checked pixel

   Tabela.addColumn("Y");
   String i=Integer.toString(j);
   Tabela.addColumn(i);
   TableRow newRow=Tabela.addRow();
   newRow.setInt("Y", Tabela.lastRowIndex());

   newRow.setFloat(s,r);
   newRow.setFloat(s,g);
   newRow.setFloat(s,b);

   output.println(s + " , "+ j +" , "+ r + " , " + g + " , " + b);  //write the data down to the file (selected data)

   color black = color(0, 0, 0);                              // checking, set a black color
   pixels[j+s]=black;                                         // checking, change the color of current pixel

  println(s + " , "+ j +" ; "+ r + " , " + g + " , " + b);    // print the read data

    }
    }
    output.flush();
    saveTable(Tabela,"data/tabela.csv");
    updatePixels();                                // set changes
}

void keyPressed()
{
output.flush();  // Writes the remaining data to the file
 output.close();  // Finishes the file
  exit();  // Stops the program
}

Java - 程序没有写下所有数据（最后删除 15 个位置） - 为什么？

Java - program does not write down all data (cuts 15 positions at the end) - why?

rgb

pixel