src/share/classes/sun/util/logging/LoggingSupport.java

*** 27,36 ****
--- 27,37 ----
  package sun.util.logging;
  
  import java.lang.reflect.Field;
  import java.security.AccessController;
  import java.security.PrivilegedAction;
+ import java.util.Date;
  
  /**
   * Internal API to support JRE implementation to detect if the java.util.logging
   * support is available but with no dependency on the java.util.logging
   * classes.  This LoggingSupport class provides several static methods to
*** 136,141 ****
--- 137,180 ----
  
      public static String getLevelName(Object level) {
          ensureAvailable();
          return proxy.getLevelName(level);
      }
+ 
+     private static final String DEFAULT_FORMAT =
+         "%1$tb %1$td, %1$tY %1$tl:%1$tM:%1$tS %1$Tp %2$s%n%4$s: %5$s%6$s%n";
+ 
+     private static final String FORMAT_PROP_KEY = "java.util.logging.SimpleFormatter.format";
+     public static String getSimpleFormat() {
+         return getSimpleFormat(true);
+     }
+ 
+     // useProxy if true will cause initialization of 
+     // java.util.logging and read its configuration 
+     static String getSimpleFormat(boolean useProxy) {
+         String format =
+             AccessController.doPrivileged(
+                 new PrivilegedAction<String>() {
+                     public String run() {
+                         return System.getProperty(FORMAT_PROP_KEY);
+                     }
+                 });
+ 
+         if (useProxy && proxy != null && format == null) {
+             format = proxy.getProperty(FORMAT_PROP_KEY);
+         }
+ 
+         if (format != null) {
+             try {
+                 // validate the user-defined format string
+                 String.format(format, new Date(), "", "", "", "", "");
+             } catch (IllegalArgumentException e) {
+                 // illegal syntax; fall back to the default format
+                 format = DEFAULT_FORMAT;
+             }
+         } else {
+             format = DEFAULT_FORMAT;
+         }
+         return format;
+     }
+ 
  }