java - how can i draw an image pixel by pixel to jframe -

i'm beginner @ java, until day tried thought myself. day here;

i've got pixels of image array rgb. want click button , make animated-like image has created pixel pixel.

this did not works;

import java.awt.borderlayout; import java.awt.flowlayout; import java.awt.graphics; import java.awt.graphics2d; import java.awt.event.mouseadapter; import java.awt.event.mouseevent; import java.awt.image.bufferedimage; import java.io.file; import java.io.ioexception;  import javax.imageio.imageio; import javax.swing.imageicon; import javax.swing.jbutton; import javax.swing.jframe; import javax.swing.jlabel; import javax.swing.jpanel; import javax.swing.border.border; import javax.swing.border.titledborder;  public class pixell extends jframe {     int x = 0;     int y = 0;     jbutton btn;     jbutton btn2;     jbutton btn3;     jlabel lbl1;      file file = new file("c:\\users\\gok\\desktop\\df.jpg");     bufferedimage image = imageio.read(file);      int w = image.getwidth();     int h = image.getheight();     int[][] rp = new int[w][(h)];     bufferedimage rsm = new bufferedimage(w, h, bufferedimage.type_int_argb);     jlabel background;     imageicon img = new imageicon(rsm);     jpanel jp;      public pixell() throws ioexception {          // todo auto-generated constructor stub          this.setsize(612, 612);         this.setlayout(null);         btn = new jbutton("al");         btn2 = new jbutton("yaz");          btn.setbounds(100, 100, 100, 100);         btn2.setbounds(100, 200, 100, 100);         background = new jlabel(img);         background.setbounds(10, 10, w, h);          this.add(btn);         this.add(btn2);          this.add(background);          btn.addmouselistener(new mouseadapter() {              @override             public void mousepressed(mouseevent e) {                  (int = 0; < w; i++) {                      (int j = 0; j < h; j++) {                          // getting pixel color position x , y                         int clr = image.getrgb(i, j);                          int red = (clr & 0x00ff0000) >> 16;                         int green = (clr & 0x0000ff00) >> 8;                         int blue = clr & 0x000000ff;                          rp[i][j] = clr;                      }                 }               }         });          btn2.addmouselistener(new mouseadapter() {              public void mousepressed(mouseevent e) {                  (int = 0; < w; i++) {                       (int j = 0; j < h; j++) {                          rsm.setrgb(i, j, rp[i][j]);                          jp.setvisible(false);                         jp.revalidate();                         jp.repaint();                          jp.setvisible(true);                         jp.revalidate();                         jp.repaint();                      }                  }             }          });        } } 

how can draw image pixel pixel jframe

there no need array.

a bufferedimage has getrgb(...) , setrgb(...) methods. create 2 bufferedimages. 1 contain full image , other contain empty bufferedimage used imageicon of jlabel.

then need create swing timer. every time timer fires need next pixel , add empty bufferedimage.

in constructor of class might create timer code like:

timer = new timer(20, new actionlistener() {     @override     public void actionperformed(actionevent e)     {         emptybi.setrgb(row, column, originalbi.getrgb(row, column);         label.repaint();          column++;          if (column >= originalbi.getwidth()         {             row++;             column = 0;         }          if (row >= originalbi.getheight()         {             timer timer = (timer)e.getsource();             timer.stop();         }     } }); 

the variables "timer, row, column, originalbi, emptybi, label" instance variables in class.

so when click button invoke timer.start().

read section swing tutorial on how use swing timers more information , examples.