Praktikum 17.10.2023 first commit

Test/praktikum01/ZahlenfilterTest.java

@@ -18,10 +18,13 @@ class ZahlenfilterTest {
 
     @Test
     void checkEndsWith9() {
+        assertTrue(Zahlenfilter.checkEndsWith9(9));
+        assertFalse(Zahlenfilter.checkEndsWith9(6));
 
     }
 
     @Test
     void checkSumDivisibleBy3() {
+
     }
 }

src/praktikum01/ErrorWriter.java

@@ -1,6 +1,6 @@
 package praktikum01;
 
-public class ErrorWriter implements HelloWorldTest{
+public class ErrorWriter implements HelloWorld {
     @Override
     public void writeHelloWorld() {
         System.err.println("HELLO WORLD");

src/praktikum01/Executor.java

@@ -1,9 +1,18 @@
 package praktikum01;
 
-public class Executor implements HelloWorldTest{
+public class Executor{
 
-    @Override
-    public void printHelloWorld() {
+    public static void main(String[] args) {
+
+        printHelloWorld(new ErrorWriter(), new OutWriter(), false);
+    }
+
+
+    public static void printHelloWorld(HelloWorld writer1, HelloWorld writer2, boolean second) {
+        if (second)
+            writer2.writeHelloWorld();
+        else
+            writer1.writeHelloWorld();
 
     }
 }

src/praktikum01/HelloWorld.java

@@ -1,6 +1,6 @@
 package praktikum01;
 
-public interface HelloWorldTest {
+public interface HelloWorld {
     void writeHelloWorld();
 
 }

src/praktikum01/OutWriter.java

@@ -1,6 +1,6 @@
 package praktikum01;
 
-public class OutWriter implements HelloWorldTest{
+public class OutWriter implements HelloWorld {
     @Override
     public void writeHelloWorld() {
         System.out.println("HELLO WORLD");