X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Futil%2FStringUtils.java;h=6044655b80c327eb3a237d82d72a6e46156284da;hb=449fb0be731c9283e9cad076a03fe730aeb2095a;hp=533e98beabeb205e6f27f8cd866da9d1ad718768;hpb=db4eacee27b836db4126dca551887bfc6652d72a;p=jalview.git

diff --git a/src/jalview/util/StringUtils.java b/src/jalview/util/StringUtils.java
index 533e98b..6044655 100644
--- a/src/jalview/util/StringUtils.java
+++ b/src/jalview/util/StringUtils.java
@@ -248,4 +248,55 @@ public class StringUtils
     }
     return "" + separator;
   }
+  
+  /**
+   * Converts a list to a string with a delimiter before each term except the
+   * first. Returns an empty string given a null or zero-length argument. This
+   * can be replaced with StringJoiner in Java 8.
+   * 
+   * @param terms
+   * @param delim
+   * @return
+   */
+  public static String listToDelimitedString(List<String> terms,
+          String delim)
+  {
+    StringBuilder sb = new StringBuilder(32);
+    if (terms != null && !terms.isEmpty())
+    {
+      boolean appended = false;
+      for (String term : terms)
+      {
+        if (appended)
+        {
+          sb.append(delim);
+        }
+        appended = true;
+        sb.append(term);
+      }
+    }
+    return sb.toString();
+  }
+
+  /**
+   * Convenience method to parse a string to an integer, returning 0 if the
+   * input is null or not a valid integer
+   * 
+   * @param s
+   * @return
+   */
+  public static int parseInt(String s)
+  {
+    int result = 0;
+    if (s != null && s.length() > 0)
+    {
+      try
+      {
+        result = Integer.parseInt(s);
+      } catch (NumberFormatException ex)
+      {
+      }
+    }
+    return result;
+  }
 }