add BifunctionDemo

.vscode/launch.json

@@ -4,6 +4,13 @@
   // Weitere Informationen finden Sie unter https://go.microsoft.com/fwlink/?linkid=830387
   "version": "0.2.0",
   "configurations": [
+    {
+      "type": "java",
+      "name": "BiFunctionDemo",
+      "request": "launch",
+      "mainClass": "BiFunctionDemo",
+      "projectName": "PR2-L_232be59f"
+    },
     {
       "type": "java",
       "name": "CollectionsDemo",

BifunctionDemo/.vscode/settings.json

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

BifunctionDemo/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).

BifunctionDemo/src/BiFunctionDemo.java

@@ -0,0 +1,18 @@
+import java.util.function.BiFunction;
+
+public class BiFunctionDemo {
+  public static void main(String args[])
+  {
+      BiFunction<Integer, Integer, Integer> composite1 = (a, b) -> a + b;
+
+      composite1 = composite1.andThen(a -> 2 * a);
+
+      System.out.println("Composite1 = " + composite1.apply(2, 3));
+
+      BiFunction<Integer, Integer, Integer> composite2 = (a, b) -> a * b;
+
+      composite2 = composite2.andThen(a -> 3 * a);
+
+      System.out.println("Composite2 = " + composite2.apply(2, 3));
+  }
+}