Refactor prefer char append

ebean-api/src/main/java/io/ebean/OrderBy.java

@@ -333,10 +333,10 @@ public class OrderBy<T> implements Serializable {
           sb.append(property);
         }
         if (!ascending) {
-          sb.append(" ").append("desc");
+          sb.append(' ').append("desc");
         }
         if (nulls != null) {
-          sb.append(" ").append(nulls).append(" ").append(highLow);
+          sb.append(' ').append(nulls).append(' ').append(highLow);
         }
         return sb.toString();
       }

ebean-api/src/main/java/io/ebean/bean/ToStringBuilder.java

@@ -45,7 +45,7 @@ public final class ToStringBuilder {
       id.putIfAbsent(bean, 0);
     }
     if (counter <= MAX) {
-      sb.append(bean.getClass().getSimpleName()).append("@").append(counter).append("(");
+      sb.append(bean.getClass().getSimpleName()).append('@').append(counter).append('(');
     }
   }
 
@@ -77,7 +77,7 @@ public final class ToStringBuilder {
    */
   public void end() {
     if (counter <= MAX) {
-      sb.append(")");
+      sb.append(')');
     }
   }
 
@@ -90,7 +90,7 @@ public final class ToStringBuilder {
     } else {
       sb.append(", ");
     }
-    sb.append(name).append(":");
+    sb.append(name).append(':');
   }
 
   private void value(Object value) {
@@ -125,20 +125,20 @@ public final class ToStringBuilder {
       sb.append("{}");
     } else {
       boolean firstElement = true;
-      sb.append("{");
+      sb.append('{');
       for (Map.Entry<?, ?> entry : map.entrySet()) {
         if (firstElement) {
           firstElement = false;
         } else {
           sb.append(", ");
         }
-        sb.append(entry.getKey()).append(":");
+        sb.append(entry.getKey()).append(':');
         value(entry.getValue());
         if (counter > MAX) {
           return;
         }
       }
-      sb.append("}");
+      sb.append('}');
     }
   }
 
@@ -151,7 +151,7 @@ public final class ToStringBuilder {
       return;
     }
     boolean firstElement = true;
-    sb.append("[");
+    sb.append('[');
     for (Object o : c) {
       if (firstElement) {
         firstElement = false;
@@ -163,7 +163,7 @@ public final class ToStringBuilder {
         return;
       }
     }
-    sb.append("]");
+    sb.append(']');
   }
 
   private boolean push(Object bean) {
@@ -178,7 +178,7 @@ public final class ToStringBuilder {
     Integer idx = id.putIfAbsent(bean, counter++);
     if (idx != null) {
       --counter;
-      sb.append(bean.getClass().getSimpleName()).append("@").append(idx);
+      sb.append(bean.getClass().getSimpleName()).append('@').append(idx);
       return false;
     }
     first = true;

ebean-api/src/main/java/io/ebean/config/dbplatform/BasicSqlLimitOffset.java

@@ -23,11 +23,11 @@ public class BasicSqlLimitOffset implements BasicSqlLimiter {
     sb.append(dbSql);
 
     if (maxRows > 0) {
-      sb.append(" ").append(LIMIT);
-      sb.append(" ").append(maxRows);
+      sb.append(' ').append(LIMIT);
+      sb.append(' ').append(maxRows);
     }
     if (firstRow > 0) {
-      sb.append(" ").append(OFFSET).append(" ");
+      sb.append(' ').append(OFFSET).append(' ');
       sb.append(firstRow);
     }
     return sb.toString();