example

Author: viktorvoltz

Containers/example.java

@@ -0,0 +1,57 @@
+import java.util.*;
+
+class Unsupported {
+    static void test(String msg, List<String> list) {
+        System.out.println("--- " + msg + " ---");
+        Collection<String> c = list;
+        Collection<String> subList = list.subList(1, 8);
+        // Copy of the sublist:
+        Collection<String> c2 = new ArrayList<String>(subList);
+        try {
+            c.retainAll(c2);
+        } catch (Exception e) {
+            System.out.println("retainAll(): " + e);
+        }
+        try {
+            c.removeAll(c2);
+        } catch (Exception e) {
+            System.out.println("removeAll(): " + e);
+        }
+        try {
+            c.clear();
+        } catch (Exception e) {
+            System.out.println("clear(): " + e);
+        }
+        try {
+            c.add("X");
+        } catch (Exception e) {
+            System.out.println("add(): " + e);
+        }
+        try {
+            c.addAll(c2);
+        } catch (Exception e) {
+            System.out.println("addAll(): " + e);
+        }
+        try {
+            c.remove("C");
+        } catch (Exception e) {
+            System.out.println("remove(): " + e);
+        }
+        // The List.set() method modifies the value but
+        // doesn’t change the size of the data structure:
+        try {
+            list.set(0, "X");
+        } catch (Exception e) {
+            System.out.println("List.set(): " + e);
+        }
+    }
+
+    public static void main(String[] args) {
+        List<String> list = Arrays.asList("A B C D E F G H I J K L".split(" "));
+        test("Modifiable Copy", new ArrayList<String>(list));
+        test("Arrays.asList()", list);
+        test("unmodifiableList()",
+                Collections.unmodifiableList(
+                        new ArrayList<String>(list)));
+    }
+}