Add Generics code snippets

05-generics/snippets/README.md

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+# Generics / Code snippets

05-generics/snippets/src/BridgeMethods.java

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+class Box<T> {
+    private T value;
+
+    public void setValue(T value) {
+        this.value = value;
+    }
+}
+
+class BoxOfInt extends Box<Integer> {
+    private Integer value;
+
+    public void setValue(Integer value) {
+        this.value = value;
+    }
+}
+
+public class BridgeMethods {
+
+    public static void main(String... args) {
+        Box<Integer> boxOfInt = new BoxOfInt();
+        boxOfInt.setValue(1);
+    }
+
+}