start working on image project

image-project/MyImage.java

@@ -12,7 +12,7 @@ public class MyImage{
 
         //read image
         try {
-            f = new File("Images/image-processing-taj.png"); //image file path
+            f = new File("img/Taj_Mahal3.png"); //image file path
             image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
             image = ImageIO.read(f);
             System.out.println("Reading complete.");
@@ -20,15 +20,16 @@ public class MyImage{
             System.out.println("Error: "+e);
         }
 
-        System.out.println("width = " + image.getWidth() + " height = " + image.getHeight());
+        System.out.println("width = " + image.getWidth() + " height = " +
+                           image.getHeight());
 
         //write image
         try {
-            f = new File("Images/Output.jpg");  //output file path
+            f = new File("img/output.jpg");  //output file path
             ImageIO.write(image, "jpg", f);
             System.out.println("Writing complete.");
         } catch(IOException e){
             System.out.println("Error: "+e);
         }
     }//main() ends here
-}//class ends here
+}//class ends here

image-project/MyImageInfo.java

@@ -6,36 +6,35 @@ import javax.imageio.ImageIO;
 public class MyImageInfo{
     public static void main(String args[]) throws IOException{
         BufferedImage image_on_disk = null;
-        //         File fin = new File("Images/Computer3.png"),
-        //         fout = new File("Images/Computer3.jpg"); // input/output file paths
-        File fin = new File("Images/Taj_Mahal3.png"), // input file path
-        fout = new File("Images/Taj_Mahal3.jpg"); // output file path
+        File inputFilePath = new File("img/wojak-wage-cage-comfy-pepe.png"),
+            outputFilePath = new File("img/wojak-wage-cage-comfy-pepe.jpg");
 
-        ImageInfo imageInfo = new ImageInfo(fin);
-        System.out.println("Informationen zum input-File " + fin + ":\n" + imageInfo + "\n");
+        ImageInfo imageInfo = new ImageInfo(inputFilePath);
+        System.out.println("Informationen zum input-File " + inputFilePath +
+                           ":\n" + imageInfo + "\n");
 
-        int width = imageInfo.width;     // width of the image
-        int height = imageInfo.height;   // height of the image
+        int width = imageInfo.width;
+        int height = imageInfo.height;
 
         image_on_disk = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
 
         //read image
         try {
-            image_on_disk = ImageIO.read(fin);
-            System.out.println("Reading " + fin + " complete !");
+            image_on_disk = ImageIO.read(inputFilePath);
+            System.out.println("Reading " + inputFilePath + " complete !");
         } catch(IOException e){
             System.out.println("Error: " + e);
         }
 
         //write image
         try {
-            ImageIO.write(image_on_disk, "jpg", fout);
-            System.out.println("Writing " + fout + " complete !");
+            ImageIO.write(image_on_disk, "jpg", outputFilePath);
+            System.out.println("Writing " + outputFilePath + " complete !");
         } catch(IOException e){
             System.out.println("Error: " + e);
         }
-    }//main() ends here
-}//class ends here
+    }
+}
 
 // BufferedImage bufferedImage;
 // 
@@ -62,4 +61,4 @@ public class MyImageInfo{
 // 
 //    }
 // 
-// }
+// }

image-project/MyImage_ohne_A_mit_A.java

@@ -11,26 +11,19 @@ public class MyImage_ohne_A_mit_A {
 
     public static void main(String [] args) {
 
-        /**
-         * 1. Geben Sie den Namen des Input-Files an.
-         * 2. Geben Sie den Namen des Output-Files an
-         * 
-         * @author (your name) 
-         * @version (a version number or a date)
-         */
-
         boolean answer = false, file_exist = false;
-        String inFileName, inFileNamePfad, outFileName, outFileNamePfad, outFormat = "";
+        String inFileName, inFileNamePfad, outFileName, outFileNamePfad,
+               outFormat = "";
 
-        FileNameSelector fc = new FileNameSelector("Images/");
-        //         fc.setPath("Images/");
+        FileNameSelector fc = new FileNameSelector("img/");
+        //         fc.setPath("img/");
 
         File fin = null, fout = null;            
 
         while (!answer && !file_exist) {       
             inFileName = fc.selectFile("Wähle das Input-File:");
             //         System.out.println(fc.getPathName());
-            inFileNamePfad = "Images/" + inFileName;
+            inFileNamePfad = "img/" + inFileName;
             //             System.out.println("inFileNamePfad = " + inFileNamePfad);
 
             fin = new File(inFileNamePfad); // input file path
@@ -38,35 +31,45 @@ public class MyImage_ohne_A_mit_A {
             String [] inFileName_Teil = inFileName.split(Pattern.quote(".")); // Ermitteln den Stamm- und die Erweiterung-Teile von inFileName:
             // inFileName_Teil[0] = Stammname, inFileName_Teil[1] = Erweiterung (png, jpg, ...)
 
-            outFileName = Db.readLine("Geben Sie den Namen des Output-Files MIT einer Erweiterung (png, jpg, etc.) ein" + "\n" + 
-                "und drücken die ENTER-Taste für Bestätigung!", inFileName_Teil[0] + ".jpg");
+            outFileName = Db.readLine("Geben Sie den Namen des Output-Files" + 
+                                      "MIT einer Erweiterung (png, jpg, etc.)" +
+                                      "ein\nund drücken die ENTER-" + 
+                                      "Taste für Bestätigung!",
+                                      inFileName_Teil[0] + ".jpg");
 
-            String [] outFileName_Teil = outFileName.split(Pattern.quote(".")); // Ermitteln den Stamm- und die Erweiterung-Teile von outFileName:
-            // outFileName_Teil[0] = Stammname, outFileName_Teil[1] = Erweiterung (png, jpg, ...)
-            outFileNamePfad = "Images/" + outFileName;
+            String [] outFileName_Teil = outFileName.split(Pattern.quote(".")); 
+            // Ermitteln den Stamm- und die Erweiterung-Teile von outFileName:
+            // outFileName_Teil[0] = Stammname,
+            // outFileName_Teil[1] = Erweiterung (png, jpg, ...)
+            outFileNamePfad = "img/" + outFileName;
 
             outFormat = outFileName_Teil[1].trim();
 
             fout = new File(outFileNamePfad); // output file path
 
             if (inFileNamePfad.equals(outFileNamePfad)) { 
-                file_exist = Db.noYes("Die Input- und Output-Bilddateien haben die gleichen Namen!" + "\n" +
-                    "Möchten Sie trotzdem fortsetzen?");
+                file_exist = Db.noYes("Die Input- und Output-Bilddateien" +
+                                      "haben die gleichen Namen!\n" +
+                                      "Möchten Sie trotzdem fortsetzen?");
 
                 if (!file_exist) {
-                    //                     file_exist = false;
-                    System.out.println("file_exist = " + file_exist + " answer = " + answer);
+                    System.out.println("file_exist = " + file_exist +
+                                       " answer = " + answer);
                     continue;
                 }
 
             }
 
             answer = Db.yesNo("Die Angaben lauten:" + "\n" +
-                "Input-Bilddatei: " + "\"" + inFileNamePfad + "\"" + "\n" +
-                "Output-Bilddatei: " + "\"" + outFileNamePfad + "\"" + "\n" +
-                "Die Ertweiterung des Input-Files: " + "\"" + inFileName_Teil[1] + "\"" + "\n" +
-                "Die Ertweiterung des Output-Files: " + "\"" + outFileName_Teil[1] + "\"" + "\n\n" +
-                "Sind Sie damit einverstanden?");
+                              "Input-Bilddatei: " + "\"" + inFileNamePfad +
+                              "\"" + "\n" +
+                              "Output-Bilddatei: " + "\"" + outFileNamePfad +
+                              "\"" + "\n" +
+                              "Die Ertweiterung des Input-Files: " + "\"" +
+                              inFileName_Teil[1] + "\"" + "\n" +
+                              "Die Ertweiterung des Output-Files: " + "\"" +
+                              outFileName_Teil[1] + "\"" + "\n\n" +
+                              "Sind Sie damit einverstanden?");
         }
 
         BufferedImage image_on_disk = null, image_memory = null;
@@ -76,49 +79,58 @@ public class MyImage_ohne_A_mit_A {
 
         try {
             image_on_disk = ImageIO.read(fin);
-            System.out.println("Reading " + fin + " complete !"); } // end try
-        catch(IOException e){
-            System.out.println("Error: " + e); } // end catch
+            System.out.println("Reading " + fin + " complete !"); }
+        catch (IOException e) {
+            System.out.println("Error: " + e);
+        }
 
-        int width =  image_on_disk.getWidth(); // Breite des Images
-        int height =  image_on_disk.getHeight(); // Höhe des Images  
+        int width =  image_on_disk.getWidth();
+        int height =  image_on_disk.getHeight();
 
         System.out.println("\n" + "width = " + width + " height = " + height + "\n");
 
         if (image_on_disk.getColorModel().hasAlpha()) {
             Alpha = true;
-            System.out.println("Die Datei HAT Alpha-Kanal\n"); // image_on_disk hat A-Kanal
+            System.out.println("Die Datei HAT Alpha-Kanal\n");
         } else {
             Alpha = false;
-            System.out.println("Die Datei hat KEINEN Alpha-Kanal\n"); // image_on_disk hat keinen A-Kanal
+            System.out.println("Die Datei hat KEINEN Alpha-Kanal\n");
         }
 
         //******************** Image kreieren und anpassen **********************
 
         if (outFormat.equals("png") && Alpha) { // png4 <-> png4
             //             System.out.println("Wir sind da: 1\n");
-            image_memory = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); // Typ TYPE_INT_ARGB, 4 Kanäle: ARGB,d.h. MIT Alpha-Kanal
+            image_memory = new BufferedImage(width, height,
+                                             BufferedImage.TYPE_INT_ARGB); 
+            // Typ TYPE_INT_ARGB, 4 Kanäle: ARGB,d.h. MIT Alpha-Kanal
 
-            // Kreieren das GLEICHE 4-Kanal Image wie image_on_disk und mit Aufrechtserhaltung des Alpha-Kanals
+            /* Kreieren das GLEICHE 4-Kanal Image wie image_on_disk und mit
+               Aufrechtserhaltung des Alpha-Kanals */
             image_memory.createGraphics().drawImage(image_on_disk, 0, 0, null);
         }
         else  { // png4/3 -> jpg oder png3 -> png3 oder jpg -> png3
             //             System.out.println("Wir sind da: 2\n");
-            image_memory = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); // Typ TYPE_INT_RGB, 3 Kanäle: RGB, d.h. OHNE Alpha-Kanal
-
-            // Kreieren ein Image mit der gleichen Breite and Höhe wie image_on_disk und WEISSEM Hintergrund zum Erzeten des A-Kanal
-            image_memory.createGraphics().drawImage(image_on_disk, 0, 0, Color.WHITE, null);
+            image_memory = new BufferedImage(width, height,
+                                             BufferedImage.TYPE_INT_RGB);
+            // Typ TYPE_INT_RGB, 3 Kanäle: RGB, d.h. OHNE Alpha-Kanal
+
+            // Kreieren ein Image mit der gleichen Breite and Höhe wie
+            // image_on_disk und WEISSEM Hintergrund zum Erzeten des A-Kanal
+            image_memory.createGraphics().drawImage(image_on_disk, 0, 0,
+                                                    Color.RED, null);
         }
 
         //******************** Image schreiben ************************
 
         try {
             ImageIO.write(image_memory, outFormat, fout);
-            System.out.println("Writing " + fout + " complete !"); } // end try 
+            System.out.println("Writing " + fout + " complete !"); }
         catch(IOException e) {
-            System.out.println("Error: " + e); } // end catch
-
-        System.exit(1); // Programm beenden
+            System.out.println("Error: " + e); 
+            System.exit(1);
+        }
 
-    } // end main
-} // end class MyImage_ohne_A_mit_A
+        System.exit(0);
+    }
+}