2 files changed, 137 insertions, 0 deletions
diff --git a/graphs/java/linkedList/src/main/java/fr/epita/assistants/linkedlist/LinkedList.java b/graphs/java/linkedList/src/main/java/fr/epita/assistants/linkedlist/LinkedList.java
new file mode 100644
index 0000000..c54f0f4
--- /dev/null
+++ b/graphs/java/linkedList/src/main/java/fr/epita/assistants/linkedlist/LinkedList.java
@@ -0,0 +1,99 @@
+package fr.epita.assistants.linkedlist;
+
+public class LinkedList<T extends Comparable<T>> {
+    static public class ListElement<T> {
+        T value;
+        ListElement<T> next;
+
+        public ListElement(T value) {
+            this.value = value;
+            this.next = null;
+        }
+    }
+
+    /**
+     * Initializes the list
+     **/
+    public ListElement<T> head;
+    public int size;
+    public LinkedList() {
+        this.head = new ListElement<T>(null);
+        this.size = 0;
+    }
+
+    /**
+     * Inserts the specified element into the list.
+     * The elements must be sorted in ascending order.
+     * null elements should be at the end of the list.
+     *
+     * @param e Element to be inserted
+     **/
+    public void insert(T e) {
+        ListElement<T> h = this.head;
+        while ((h.next != null) && (h.next.value.compareTo(e) < 0))
+            h = h.next;
+
+        if (h.next == null)
+            h.next = new ListElement<T>(e);
+        else
+        {
+            ListElement<T> tmp = h.next;
+            h.next = new ListElement<>(e);
+            h.next.next = tmp;
+        }
+        this.size++;
+    }
+
+    /**
+     * Returns the n-th element in the list.
+     *
+     * @param i Index
+     * @return The element at the given index
+     * @throws IndexOutOfBoundsException if there is no element at this
+     *                                   index.
+     **/
+    public T get(int i) {
+        if (i >= this.size || i < 0)
+            throw new IndexOutOfBoundsException();
+        ListElement<T> h = this.head;
+        while(i-- != 0)
+            h = h.next;
+        return h.next.value;
+    }
+
+    /**
+     * Removes the first occurrence of the specified element in the list.
+     *
+     * @param e Element to remove
+     * @return returns the element that has been removed or null
+     **/
+    public T remove(T e) {
+        ListElement<T> h = this.head;
+        while ((h.next != null) && (h.next.value.compareTo(e) != 0))
+            h = h.next;
+        if (h.next == null)
+            return null;
+        ListElement<T> res = h.next;
+        h.next = h.next.next;
+        res.next = null;
+        this.size--;
+        return res.value;
+    }
+
+    /**
+     * Returns the size of the list.
+     *
+     * @return Number of elements in the list
+     **/
+    public int size() {
+        return this.size;
+    }
+
+    /**
+     * Removes all elements from the list.
+     **/
+    public void clear() {
+        this.head.next = null;
+        this.size = 0;
+    }
+}
+\ No newline at end of file
diff --git a/graphs/java/linkedList/src/test/java/fr/epita/assistants/linkedlist/LinkedListTests.java b/graphs/java/linkedList/src/test/java/fr/epita/assistants/linkedlist/LinkedListTests.java
new file mode 100644
index 0000000..58ee1b1
--- /dev/null
+++ b/graphs/java/linkedList/src/test/java/fr/epita/assistants/linkedlist/LinkedListTests.java
@@ -0,0 +1,38 @@
+package fr.epita.assistants.linkedlist;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.Timeout;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class LinkedListTests {
+    @Test
+    @Timeout(value = 10, threadMode = Timeout.ThreadMode.SEPARATE_THREAD)
+    public void testInsertOne() {
+        LinkedList<Integer> list = new LinkedList<>();
+        list.insert(12);
+        assertEquals(Integer.valueOf(12), list.get(0), "Invalid element");
+    }
+
+    @Test
+    @Timeout(value = 10, threadMode = Timeout.ThreadMode.SEPARATE_THREAD)
+    public void testGetFail() {
+        LinkedList<Integer> list = new LinkedList<>();
+        list.insert(3);
+        list.insert(5);
+        list.insert(2);
+        assertThrows(IndexOutOfBoundsException.class, () -> list.get(4));
+    }
+
+    @Test
+    @Timeout(value = 10, threadMode = Timeout.ThreadMode.SEPARATE_THREAD)
+    public void testRemoveNotPresent() {
+        LinkedList<Integer> list = new LinkedList<>();
+        list.insert(1);
+        list.insert(2);
+        list.insert(3);
+        list.insert(4);
+        assertNull(list.remove(12), "Invalid return value of remove()");
+    }
+    // add your own tests here
+}