Here you can find the source of recordFactoryDefault(String className, Attributes attributes)
private static void recordFactoryDefault(String className, Attributes attributes)
//package com.java2s; import java.util.jar.Attributes; public class Main { private static String defaultFactoryClassName; private static void recordFactoryDefault(String className, Attributes attributes) { if (isSet(attributes, "Default-Factory")) { defaultFactoryClassName = className; }/*from w w w . ja va 2 s . c om*/ } private static boolean isSet(Attributes attributes, String name) { boolean isSet = false; String s = attributes.getValue(name); if (s != null) { s = s.trim(); isSet = s.equalsIgnoreCase("true"); } return isSet; } }