src/java.base/share/classes/java/lang/System.java

*** 33,42 ****
--- 33,44 ----
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.PrintStream;
  import java.io.UnsupportedEncodingException;
  import java.lang.annotation.Annotation;
+ import java.lang.invoke.MethodHandle;
+ import java.lang.invoke.MethodType;
  import java.lang.module.ModuleDescriptor;
  import java.lang.reflect.Constructor;
  import java.lang.reflect.Executable;
  import java.lang.reflect.Method;
  import java.lang.reflect.Modifier;
*** 2193,2202 ****
--- 2195,2208 ----
                  return cl.createOrGetClassLoaderValueMap();
              }
              public Class<?> defineClass(ClassLoader loader, String name, byte[] b, ProtectionDomain pd, String source) {
                  return ClassLoader.defineClass1(loader, name, b, 0, b.length, pd, source);
              }
+             public Class<?> defineClass(ClassLoader loader, Class<?> lookup, String name, byte[] b, ProtectionDomain pd,
+                                         boolean initialize, int flags, Object classData) {
+                 return ClassLoader.defineClass0(loader, lookup, name, b, 0, b.length, pd, initialize, flags, classData);
+             }
              public Class<?> findBootstrapClassOrNull(ClassLoader cl, String name) {
                  return cl.findBootstrapClassOrNull(name);
              }
              public Package definePackage(ClassLoader cl, String name, Module module) {
                  return cl.definePackage(name, module);
*** 2280,2287 ****
--- 2286,2302 ----
  
              public void loadLibrary(Class<?> caller, String library) {
                  assert library.indexOf(java.io.File.separatorChar) < 0;
                  ClassLoader.loadLibrary(caller, library, false);
              }
+ 
+             public ProtectionDomain protectionDomain(Class<?> c) {
+                 return c.protectionDomain();
+             }
+ 
+             public MethodHandle stringConcatHelper(String name, MethodType methodType) {
+                 return StringConcatHelper.lookupStatic(name, methodType);
+             }
+ 
          });
      }
  }