Git

Programmierung2/src/Algorithmus/Allgemeine_Übungen.java

@@ -3,36 +3,37 @@ package Algorithmus;
 public class Allgemeine_Übungen {
 
 	public static void main(String[] args) {
-		String text = "HalloWelt";
-		String o = "o";
-		 text.substring(0, 0);
-		int x = indexof(text,o); 
-		System.out.println(x);
-	}
-	
-	public static int indexof(String text,String s) {
-		for (int i = 0; i < text.length(); i++)
-			if (text.charAt(i) == s.charAt(0))
-				return i;
-		return 0;
-	}
-	
-	
-	
-	public static void find_Sub_Array(int[] arr, int target) {
-		
-		int merker = 0;
-		for (int i = 0; i < arr.length -1 ; i++) {
-			merker = arr[i];
-			for (int j = i + 1; j < arr.length; j++) {
-				merker += arr[j];
-				if (merker == target) {
-					System.out.println("Ab Index: " + i + " bis Index: " + j + " sind die Summer der Zahl: " + target);
-					break;
-				}
-			}
+		String text = "H";
+		try {
+			System.out.println(codePointBefore(text,1));
+			
+		}catch(StringIndexOutOfBoundsException e) {
+			System.out.println(e.toString());
 		}
 		
+		
+	}
+	
+	static int codePointBefore(String s, int index)throws StringIndexOutOfBoundsException{
+		if (index > s.length() + 1 || index < 1)
+			throw new StringIndexOutOfBoundsException();
+		
+		char[] charArray = s.toCharArray();
+		return charArray[index-1];
+	}
+	
+	static int codePointAt(String s, int index)throws StringIndexOutOfBoundsException {
+		if (index > s.length() || index < 0)
+			throw new StringIndexOutOfBoundsException();		
+		char[] charArray = s.toCharArray();
+		return charArray[index];
+	}
+	
+	static char charAt(String s, int index) throws StringIndexOutOfBoundsException {
+		if (index > s.length() || index < 0)
+			throw new StringIndexOutOfBoundsException();		
+		char[] charArray = s.toCharArray();
+		return charArray[index];
 	}
 
 }

Programmierung2/src/Übungen/Ponggame/GamePlay.java

@@ -5,7 +5,7 @@ import java.util.Random;
 public class GamePlay {
 
 	public static void main(String[] args) {
-	GameWindow game = new GameWindow();
+	 new GameWindow();
 		
 	}