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src/org/blueshard/cryptogx/Utils.java

@@ -0,0 +1,21 @@
+package org.blueshard.cryptogx;
+
+public class Utils {
+
+    /**
+     * <p>Checks if any character in {@param characters} appears in {@param string}</p>
+     *
+     * @param characters that should be searched in {@param string}
+     * @param string that should be searched for the characters
+     * @return if any character in {@param characters} appears in {@param string}
+     */
+    public static boolean hasAnyCharacter(CharSequence characters, String string) {
+        for (char c: characters.toString().toCharArray()) {
+            if (string.indexOf(c) != -1) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+}