added old projects

CS101/lab_12/.vscode/settings.json

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+{
+    "java.project.sourcePaths": ["src"],
+    "java.project.outputPath": "bin"
+}

CS101/lab_12/README.md

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+## 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).

CS101/lab_12/src/Die.java

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+import java.util.Random;
+
+public class Die {
+    
+    private int _sides = 6;
+    private int _roll;
+
+
+    public int roll() {
+        Random rnd = new Random();
+        _roll = rnd.nextInt(_sides) + 1;
+        return _roll;
+    }
+    
+    public int getRoll() {
+        return _roll;
+    }
+
+    public String toString()  {
+        switch (_roll) {
+            case 1: 
+                return "One";
+            case 2:
+                return "Two";
+            case 3:
+                return "Three";
+            case 4: 
+                return "Four";
+            case 5:
+                return "Five";
+            case 6:
+                return "Six";
+            default:
+                return "roll the dice";
+        }
+    }
+}

CS101/lab_12/src/PairOfDice.java

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+public class PairOfDice {
+    Die die1 = new Die();
+    Die die2 = new Die(3);
+    int _sides;
+    
+    public void PairOfDice() {
+        _sides = 6;
+    }
+
+    public void PairOfDice(int sides) {
+        _sides = sides;
+    }
+
+    public void roll() {
+        die1.roll();
+        die2.roll();
+    }
+
+    public int getRoll() {
+        return die1.getRoll() + die2.getRoll();
+    }    
+}

CS101/lab_12/src/Player.java

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+public class Player {
+    public static void main(String[] args) throws Exception {
+        Die die1 = new Die(); 
+        Die die2 = new Die();
+        PairOfDice pod1 = new PairOfDice();
+        PairOfDice pod2 = new PairOfDice();
+
+
+        die1.roll();
+        System.out.println("1 Die: " + die1.toString());
+
+        die2.roll();
+        System.out.println("1 Die: " + die2.toString());
+
+        pod1.roll();
+        pod2.roll();
+        System.out.println("2 Dice: " + pod1.getRoll());
+        System.out.println("2 Dice: " + pod2.getRoll());   
+    }
+}