translation: Add Python and Java code for EN version (#1345)

* Add the intial translation of code of all the languages

* test

* revert

* Remove

* Add Python and Java code for EN version

en/codes/java/utils/Vertex.java

@@ -0,0 +1,36 @@
+/**
+ * File: Vertex.java
+ * Created Time: 2023-02-15
+ * Author: krahets (krahets@163.com)
+ */
+
+package utils;
+
+import java.util.*;
+
+/* Vertex class */
+public class Vertex {
+    public int val;
+
+    public Vertex(int val) {
+        this.val = val;
+    }
+
+    /* Input a list of values vals, return a list of vertices vets */
+    public static Vertex[] valsToVets(int[] vals) {
+        Vertex[] vets = new Vertex[vals.length];
+        for (int i = 0; i < vals.length; i++) {
+            vets[i] = new Vertex(vals[i]);
+        }
+        return vets;
+    }
+
+    /* Input a list of vertices vets, return a list of values vals */
+    public static List<Integer> vetsToVals(List<Vertex> vets) {
+        List<Integer> vals = new ArrayList<>();
+        for (Vertex vet : vets) {
+            vals.add(vet.val);
+        }
+        return vals;
+    }
+}