Update of exercises

Assignment_002/readme.md

@@ -1,6 +1,6 @@
 # Labeled Break
 
-
+ [Musterlösung](solution/)
 
 ## Lernziel
 

Assignment_002/solution/readme.md

@@ -0,0 +1,4 @@
+# Lösung: Labeled Break
+
+
+[pr2.auffrischung.labeled_break](../../solutions/src/main/java/pr2/auffrischung/labeled_break)

Assignment_003/readme.md

@@ -1,6 +1,6 @@
 # Passwortbewertung
 
-
+ [Musterlösung](solution/)
 
 ## Lernziel
 

Assignment_003/solution/readme.md

@@ -0,0 +1,4 @@
+# Lösung: Passwortbewertung
+
+
+[pr2.auffrischung.password](../../solutions/src/main/java/pr2/auffrischung/password)

Assignment_004/readme.md

@@ -1,6 +1,6 @@
 # printf mit Formatstring
 
-
+ [Musterlösung](solution/)
 
 ## Lernziel
 

Assignment_004/solution/readme.md

@@ -0,0 +1,4 @@
+# Lösung: printf mit Formatstring
+
+
+[pr2.auffrischung.printf](../../solutions/src/main/java/pr2/auffrischung/printf)

Assignment_005/readme.md

@@ -1,6 +1,6 @@
 # Maximum in einem Array suchen
 
-
+ [Musterlösung](solution/)
 
 ## Lernziel
 

Assignment_005/solution/readme.md

@@ -0,0 +1,4 @@
+# Lösung: Maximum in einem Array suchen
+
+
+[pr2.auffrischung.suchemax](../../solutions/src/main/java/pr2/auffrischung/suchemax)

Assignment_006/readme.md

@@ -1,6 +1,6 @@
 # Taschenrechner
 
-
+ [Musterlösung](solution/)
 
 ## Lernziel
 

Assignment_006/solution/readme.md

@@ -0,0 +1,4 @@
+# Lösung: Taschenrechner
+
+
+[pr2.auffrischung.taschenrechner](../../solutions/src/main/java/pr2/auffrischung/taschenrechner)

Assignment_007/readme.md

@@ -1,6 +1,6 @@
 # Quine
 
- [Musterlösung](solution/)
+
 
 ## Lernziel
 

Assignment_007/solution/readme.md

@@ -1,5 +0,0 @@
-# Lösung: Quine
-
-Musterlösung:
-
-[pr2.auffrischung.quine](../../solutions/src/main/java/pr2/auffrischung/quine/)

readme.md

@@ -11,12 +11,12 @@ Hinweise zur nötigen Softwareausstattung finden Sie [hier](help/softwareausstat
 | #  | Ausgabe    | Thema                                                                                       | Musterlösung  |
 |----|---------------------------------------------------------------------------------------------|----------------|----------------|
 | 1. | n/a | [String in Großbuchstaben umwandeln](Assignment_001/readme.md)                              |  [✅](Assignment_001/solution/readme.md) |
-| 2. | n/a | [Labeled Break](Assignment_002/readme.md)                                                   |   |
-| 3. | n/a | [Passwortbewertung](Assignment_003/readme.md)                                               |   |
-| 4. | n/a | [printf mit Formatstring](Assignment_004/readme.md)                                         |   |
-| 5. | n/a | [Maximum in einem Array suchen](Assignment_005/readme.md)                                   |   |
-| 6. | n/a | [Taschenrechner](Assignment_006/readme.md)                                                  |   |
-| 7. | n/a | [Quine](Assignment_007/readme.md)                                                           |  [✅](Assignment_007/solution/readme.md) |
+| 2. | n/a | [Labeled Break](Assignment_002/readme.md)                                                   |  [✅](Assignment_002/solution/readme.md) |
+| 3. | n/a | [Passwortbewertung](Assignment_003/readme.md)                                               |  [✅](Assignment_003/solution/readme.md) |
+| 4. | n/a | [printf mit Formatstring](Assignment_004/readme.md)                                         |  [✅](Assignment_004/solution/readme.md) |
+| 5. | n/a | [Maximum in einem Array suchen](Assignment_005/readme.md)                                   |  [✅](Assignment_005/solution/readme.md) |
+| 6. | n/a | [Taschenrechner](Assignment_006/readme.md)                                                  |  [✅](Assignment_006/solution/readme.md) |
+| 7. | n/a | [Quine](Assignment_007/readme.md)                                                           |   |
 | 8. | n/a | [Java-Coding-Standard anwenden](Assignment_008/readme.md)                                   |   |
 | 9. | n/a | [JavaDoc schreiben](Assignment_009/readme.md)                                               |   |
 | 10. | n/a | [Klasse mit JUnit testen](Assignment_010/readme.md)                                         |   |

solutions/src/main/java/pr2/auffrischung/labeled_break/ArraySucher.java

@@ -0,0 +1,27 @@
+package pr2.auffrischung.labeled_break;
+
+public class ArraySucher {
+
+    /**
+     * Sucht das erste Element, dass nicht 0 ist.
+     *
+     * @param array das Array in dem gesucht werden soll
+     * @return {@code true}, wenn ein Element gefunden wird,
+     *  andernfalls {@code false}.
+     */
+    public boolean suche(int[][] array) {
+        boolean found = false;
+
+        outer:
+        for (int[] is : array) {
+            for (int i : is) {
+                if (i != 0) {
+                    found = true;
+                    break outer;
+                }
+            }
+        }
+
+        return found;
+    }
+}

solutions/src/main/java/pr2/auffrischung/password/PasswortChecker.java

@@ -0,0 +1,53 @@
+package pr2.auffrischung.password;
+
+public class PasswortChecker {
+
+    private static final char[] NUMBERS = "1234567890".toCharArray();
+    private static final char[] LOWERCASE
+            = "abcdefghijklmnopqrstuvwxyz".toCharArray();
+    private static final char[] UPPERCASE
+            = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".toCharArray();
+    private static final char[] SPECIAL_CHARS = "!%()\"".toCharArray();
+
+    private static boolean contains(String string, char[] chars) {
+        for (char c : chars) {
+            if (string.indexOf(c) >= 0) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public static int checkPassword(String password) {
+        int points = 0;
+
+        if (password.length() >= 8) {
+            points++;
+        }
+
+        if (contains(password, NUMBERS)
+                && (contains(password, LOWERCASE)
+                || contains(password, UPPERCASE))) {
+            points++;
+        }
+
+        if (contains(password, SPECIAL_CHARS)) {
+            points++;
+        }
+
+        if (contains(password, LOWERCASE) && contains(password, UPPERCASE)) {
+            points++;
+        }
+
+        return points;
+    }
+
+    public static void main(String[] args) {
+        System.out.println(checkPassword("mutti"));
+        System.out.println(checkPassword("Mutti"));
+        System.out.println(checkPassword("mutti123"));
+        System.out.println(checkPassword("Mutti123"));
+        System.out.println(checkPassword("Mutti123!%"));
+        System.out.println(checkPassword("1234"));
+    }
+}

solutions/src/main/java/pr2/auffrischung/printf/DoubleFormatter.java

@@ -0,0 +1,18 @@
+package pr2.auffrischung.printf;
+
+public class DoubleFormatter {
+
+    public static void printDouble(double d) {
+        System.out.printf("%.3f%n", d);
+    }
+
+    public static void main(String[] args) {
+        printDouble(1.0);
+        printDouble(10.1);
+        printDouble(2.01);
+        printDouble(2.001);
+        printDouble(2.0001);
+        printDouble(2.0004);
+        printDouble(2.0005);
+    }
+}

solutions/src/main/java/pr2/auffrischung/quine/Quine.java

@@ -1,19 +0,0 @@
-
-package pr2.auffrischung.quine;
-
-public class Quine {
-
-    private static final String DATA = "package pr2.auffrischung.quine;%n%n"
-            + "public class Quine {%n%n"
-            + "     private static final String DATA = \"%s\";%n%n"
-            + "      public static void main(String[] args) {%n"
-            + "          System.out.printf(data, %n"
-            + "              DATA.replace(\"\\\\\", \"\\\\\\\\\")%n"
-            + "                  .replace(\"\\\"\", \"\\\\\\\"\"));%n    }%n}";
-
-    public static void main(String[] args) {
-        System.out.printf(DATA,
-            DATA.replace("\\", "\\\\")
-                .replace("\"", "\\\""));
-    }
-}

solutions/src/main/java/pr2/auffrischung/suchemax/GroessteZahl.java

@@ -0,0 +1,21 @@
+package pr2.auffrischung.suchemax;
+
+public class GroessteZahl {
+
+    public int sucheMax(int[] zahlen) {
+        int max = Integer.MIN_VALUE; 
+
+        for (int zahl : zahlen) {
+            max = Math.max(max, zahl);
+        }
+
+        return max;
+    }
+
+    public static void main(String[] args) {
+        GroessteZahl g = new GroessteZahl();
+        System.out.println(g.sucheMax(new int[] {1, 5, 8, 2, 0}));
+        System.out.println(g.sucheMax(new int[] {-1, -5, -8, -2, -20}));
+        System.out.println(g.sucheMax(new int[] {10000, -10000, 1, 2, 33}));
+    }
+}

solutions/src/main/java/pr2/auffrischung/taschenrechner/Taschenrechner.java

@@ -0,0 +1,25 @@
+package pr2.auffrischung.taschenrechner;
+
+public class Taschenrechner {
+
+    public double rechne(double o1, char op, double o2) {
+        return switch (op) {
+            case '+' -> o1 + o2;
+            case '-' -> o1 - o2;
+            case '*' -> o1 * o2;
+            case '/' -> o1 / o2;
+            case '^' -> Math.pow(o1, o2);
+            default -> Double.NaN;
+        };
+//        return 0.0;
+    }
+
+    public static void main(String[] args) {
+        Taschenrechner t = new Taschenrechner();
+        System.out.println(t.rechne(1, '+', 2));
+        System.out.println(t.rechne(1, '-', 2));
+        System.out.println(t.rechne(2, '*', 2));
+        System.out.println(t.rechne(4, '/', 2));
+        System.out.println(t.rechne(2, '^', 32));
+    }
+}