From df29b42b97be4387787e31139f0723a8c3a189ce Mon Sep 17 00:00:00 2001
From: Jonathan Cobb <jonathan@kyuss.org>
Date: Sun, 6 Sep 2020 13:22:52 -0400
Subject: [PATCH] add PortPicker.portIsAvailable

---
 .../java/org/cobbzilla/util/network/PortPicker.java   | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/main/java/org/cobbzilla/util/network/PortPicker.java b/src/main/java/org/cobbzilla/util/network/PortPicker.java
index 22cbe6b..a76f2e2 100644
--- a/src/main/java/org/cobbzilla/util/network/PortPicker.java
+++ b/src/main/java/org/cobbzilla/util/network/PortPicker.java
@@ -21,4 +21,15 @@ public class PortPicker {
         }
     }
 
+    // adapted from https://stackoverflow.com/a/434731/1251543
+    public static boolean portIsAvailable (int port) {
+        boolean free;
+        try (ServerSocket ignored = new ServerSocket(port)) {
+            free = true;
+        } catch (IOException e) {
+            free = false;
+        }
+        return free;
+    }
+
 }
\ No newline at end of file