Move Thread.completeInitialization() into J9VMInternals

Refactoring Thread to simplify RI java.lang.Thread adoption.

Signed-off-by: Jason Feng <fengj@ca.ibm.com>

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

@@ -32,8 +32,6 @@
 package java.lang;
 
 import java.lang.reflect.Method;
-import java.io.FileDescriptor;
-import java.nio.charset.Charset;
 import java.security.AccessController;
 import java.security.AccessControlContext;
 import java.security.PrivilegedAction;
@@ -1556,6 +1554,10 @@ public void setContextClassLoader(ClassLoader cl) {
  contextClassLoader = cl;
  }
 
+ void internalSetContextClassLoader(ClassLoader cl) {
+ contextClassLoader = cl;
+ }
+
  /**
  * Returns {@code true} if and only if the current thread holds the
  * monitor lock on the specified object.
@@ -2068,41 +2070,6 @@ private void dispatchUncaughtException(Throwable e) {
  // Used internally to compute Thread names that comply with the Java specification
  private static int createCount = -1;
 
- /*
- * Called after everything else is initialized.
- */
- void completeInitialization() {
- // Get the java.system.class.loader
- contextClassLoader = ClassLoader.getSystemClassLoader();
- jdk.internal.misc.VM.initLevel(4);
- System.startSNMPAgent();
-
- /* Although file.encoding is used to set the default Charset, some Charset's are not available
- * in the java.base module and so are not used at startup. There are additional Charset's in the
- * jdk.charsets module, which is only loaded later. This means the default Charset may not be the
- * same as file.encoding. Now that all modules and Charset's are available, check if the desired
- * encodings can be used for System.err and System.out.
- */
- Properties props = System.internalGetProperties();
- // If the sun.stderr.encoding was already set in System, don't change the encoding
- if (!System.hasSetErrEncoding()) {
- Charset stderrCharset = System.getCharset(props.getProperty("sun.stderr.encoding"), true);
- if (stderrCharset != null) {
- System.err.flush();
- System.setErr(System.createConsole(FileDescriptor.err, stderrCharset));
- }
- }
-
- // If the sun.stdout.encoding was already set in System, don't change the encoding
- if (!System.hasSetOutEncoding()) {
- Charset stdoutCharset = System.getCharset(props.getProperty("sun.stdout.encoding"), true);
- if (stdoutCharset != null) {
- System.out.flush();
- System.setOut(System.createConsole(FileDescriptor.out, stdoutCharset));
- }
- }
- }
-
  void uncaughtException(Throwable e) {
  UncaughtExceptionHandler handler = getUncaughtExceptionHandler();
  if (handler != null) {