added TaschenrechnerInt-demos and some copyrights

.vscode/launch.json

@@ -4,6 +4,27 @@
   // Weitere Informationen finden Sie unter https://go.microsoft.com/fwlink/?linkid=830387
   "version": "0.2.0",
   "configurations": [
+    {
+      "type": "java",
+      "name": "TaschenrechnerInt2",
+      "request": "launch",
+      "mainClass": "TaschenrechnerInt2",
+      "projectName": "PR2-L_ada963eb"
+    },
+    {
+      "type": "java",
+      "name": "TaschenrechnerInt",
+      "request": "launch",
+      "mainClass": "TaschenrechnerInt",
+      "projectName": "PR2-L_ada963eb"
+    },
+    {
+      "type": "java",
+      "name": "DemoParallel",
+      "request": "launch",
+      "mainClass": "DemoParallel",
+      "projectName": "PR2-L_ada963eb"
+    },
     {
       "type": "java",
       "name": "TaschenrechnerInt4",

DemoLazy/src/DemoLazy.java

@@ -1,4 +1,7 @@
-// Lazy Evaluation von Operationen
+/**Copyright (c)  Balzert, H: "Java: Objektorientiert Programmieren" 
+ * W3L-Verlag Dortmund, 3. Auflage, 2014
+ * Lazy Evaluation von Operationen, S. 345.
+*/
 
 import java.util.ArrayList;
 import java.util.stream.Stream;

DemoParallel/src/DemoParallel.java

@@ -1,30 +1,32 @@
-// Sequenzielle vs. parallele Berechnung
+/**Copyright (c)  Balzert, H: "Java: Objektorientiert Programmieren" 
+ * W3L-Verlag Dortmund, 3. Auflage, 2014
+ * Sequenzielle vs. parallele Berechnung, S. 347 f.
+*/
 
 import java.util.stream.Stream;
 import java.util.List;
 import java.util.stream.Collectors;
 
 public class DemoParallel {
+  public static void main(String[] args) {
+    
+    double uGrenze = -30.0, oGrenze = +40.0;
+    // Bereiche der Zufallszahlen
+    // Liste mit 10 Mio. Daten erzeugen
+    List<Double> d = Stream.generate(
+        () -> (uGrenze + (Math.random() * (oGrenze - uGrenze + 1))))
+        .limit(10_000_000).collect(Collectors.toList());
 
-	public static void main(String[] args) {
-		long start = System.currentTimeMillis();
-		
-		double uGrenze = -30.0, oGrenze = +40.0;
-		// Bereiche der Zufallszahlen
-		// Liste mit 10 Mio. Daten erzeugen
-		List<Double> d = Stream.generate(
-				() -> new Double(uGrenze+(Math.random() *
-						(oGrenze - uGrenze + 1))))
-				.limit(10_000_000).collect(Collectors.toList());
-		
-		List<Double> temp =
-				d.stream()
-				.sorted()
-				.filter(wert -> (Math.abs(wert) > 25.0))
-				.parallel()
-				.collect(Collectors.toList());
-		
-		long stop = System.currentTimeMillis();
-		System.out.println("Verbrauchte Zeit in ms: " + (stop - start));
-	}
+    long start = System.currentTimeMillis();
+
+    d.stream()
+        .parallel()
+        .sorted()
+        .filter(wert -> (Math.abs(wert) > 25.0))
+        .collect(Collectors.toList());
+
+    long stop = System.currentTimeMillis();
+    
+    System.out.println("Verbrauchte Zeit in ms: " + (stop - start));
+  }
 }

TaschenrechnerInt/.vscode/settings.json

@@ -0,0 +1,7 @@
+{
+    "java.project.sourcePaths": ["src"],
+    "java.project.outputPath": "bin",
+    "java.project.referencedLibraries": [
+        "lib/**/*.jar"
+    ]
+}

TaschenrechnerInt/README.md

@@ -0,0 +1,18 @@
+## Getting Started
+
+Welcome to the VS Code Java world. Here is a guideline to help you get started to write Java code in Visual Studio Code.
+
+## Folder Structure
+
+The workspace contains two folders by default, where:
+
+- `src`: the folder to maintain sources
+- `lib`: the folder to maintain dependencies
+
+Meanwhile, the compiled output files will be generated in the `bin` folder by default.
+
+> If you want to customize the folder structure, open `.vscode/settings.json` and update the related settings there.
+
+## Dependency Management
+
+The `JAVA PROJECTS` view allows you to manage your dependencies. More details can be found [here](https://github.com/microsoft/vscode-java-dependency#manage-dependencies).

TaschenrechnerInt/src/TaschenrechnerInt.java

@@ -0,0 +1,22 @@
+/**Copyright (c)  Balzert, H: "Java: Objektorientiert Programmieren" 
+ * W3L-Verlag Dortmund, 3. Auflage, 2014
+ * Funktionale Schnittstellen, S. 339
+*/
+
+public class TaschenrechnerInt
+{
+  @FunctionalInterface
+  interface MathInteger
+  {
+    int berechne(int a, int b);
+  }
+  
+  public static void main(String args [])
+  {
+    MathInteger addiere = (c, d) -> c + d;
+    MathInteger multipliziere = (x, y) -> x * y;
+
+    System.out.println(addiere.berechne(10, 20));
+    System.out.println(multipliziere.berechne(10, 20));
+  }
+}

TaschenrechnerInt2/.vscode/settings.json

@@ -0,0 +1,7 @@
+{
+    "java.project.sourcePaths": ["src"],
+    "java.project.outputPath": "bin",
+    "java.project.referencedLibraries": [
+        "lib/**/*.jar"
+    ]
+}

TaschenrechnerInt2/README.md

@@ -0,0 +1,18 @@
+## Getting Started
+
+Welcome to the VS Code Java world. Here is a guideline to help you get started to write Java code in Visual Studio Code.
+
+## Folder Structure
+
+The workspace contains two folders by default, where:
+
+- `src`: the folder to maintain sources
+- `lib`: the folder to maintain dependencies
+
+Meanwhile, the compiled output files will be generated in the `bin` folder by default.
+
+> If you want to customize the folder structure, open `.vscode/settings.json` and update the related settings there.
+
+## Dependency Management
+
+The `JAVA PROJECTS` view allows you to manage your dependencies. More details can be found [here](https://github.com/microsoft/vscode-java-dependency#manage-dependencies).

TaschenrechnerInt2/src/TaschenrechnerInt2.java

@@ -0,0 +1,25 @@
+/**Copyright (c)  Balzert, H: "Java: Objektorientiert Programmieren" 
+ * W3L-Verlag Dortmund, 3. Auflage, 2014
+ * Funktionale Schnittstellen, S. 340
+*/
+
+public class TaschenrechnerInt2
+{
+  @FunctionalInterface
+  interface MathInteger
+  {
+    int berechne(int a, int b);
+  }
+  
+  public static int ergebnis(int x, int y, MathInteger op)
+  {
+    return op.berechne(x, y);
+  }
+  
+  public static void main(String args [])
+  {
+    int c = 10, d = 20;
+    System.out.println(ergebnis(c, d, (c1, d1) -> c1 - d1));
+    System.out.println(ergebnis(c, d, (c1, d1) -> c1 / d1));
+  }
+}

TaschenrechnerInt3/src/MathInteger.java

@@ -1,3 +1,8 @@
+/**Copyright (c)  Balzert, H: "Java: Objektorientiert Programmieren" 
+ * W3L-Verlag Dortmund, 3. Auflage, 2014
+ * Funktionale Schnittstellen, S. 341.
+*/
+
 @FunctionalInterface
 interface MathInteger
 {

TaschenrechnerInt4/src/TaschenrechnerInt4.java

@@ -1,3 +1,8 @@
+/**Copyright (c)  Balzert, H: "Java: Objektorientiert Programmieren" 
+ * W3L-Verlag Dortmund, 3. Auflage, 2014
+ * Funktionale Schnittstellen, S. 343.
+*/
+
 import java.util.function.IntFunction;
 import java.util.function.IntPredicate;