8274946: Cleanup unnecessary calls to Throwable.initCause() in java.rmi

Reviewed-by: iris, rriggs

src/java.rmi/share/classes/java/rmi/server/RMIClassLoader.java

@@ -694,10 +694,8 @@ private static RMIClassLoaderSpi initializeProvider() {
             } catch (InstantiationException e) {
                 throw new InstantiationError(e.getMessage());
             } catch (ClassCastException e) {
-                Error error = new LinkageError(
-                    "provider class not assignable to RMIClassLoaderSpi");
-                error.initCause(e);
-                throw error;
+                throw new LinkageError(
+                    "provider class not assignable to RMIClassLoaderSpi", e);
             }
         }
 
@@ -711,10 +709,8 @@ private static RMIClassLoaderSpi initializeProvider() {
             try {
                 return iter.next();
             } catch (ClassCastException e) {
-                Error error = new LinkageError(
-                    "provider class not assignable to RMIClassLoaderSpi");
-                error.initCause(e);
-                throw error;
+                throw new LinkageError(
+                    "provider class not assignable to RMIClassLoaderSpi", e);
             }
         }
 

src/java.rmi/share/classes/java/rmi/server/RemoteObjectInvocationHandler.java

@@ -221,8 +221,7 @@ private Object invokeRemoteMethod(Object proxy,
                     method = cl.getMethod(method.getName(),
                                           method.getParameterTypes());
                 } catch (NoSuchMethodException nsme) {
-                    throw (IllegalArgumentException)
-                        new IllegalArgumentException().initCause(nsme);
+                    throw new IllegalArgumentException(nsme);
                 }
                 Class<?> thrownType = e.getClass();
                 for (Class<?> declaredType : method.getExceptionTypes()) {

src/java.rmi/share/classes/javax/rmi/ssl/SslRMIClientSocketFactory.java

@@ -133,8 +133,7 @@ public Socket createSocket(String host, int port) throws IOException {
             try {
                 sslSocket.setEnabledCipherSuites(enabledCipherSuitesList);
             } catch (IllegalArgumentException e) {
-                throw (IOException)
-                    new IOException(e.getMessage()).initCause(e);
+                throw new IOException(e.getMessage(), e);
             }
         }
         // Set the SSLSocket Enabled Protocols
@@ -151,8 +150,7 @@ public Socket createSocket(String host, int port) throws IOException {
             try {
                 sslSocket.setEnabledProtocols(enabledProtocolsList);
             } catch (IllegalArgumentException e) {
-                throw (IOException)
-                    new IOException(e.getMessage()).initCause(e);
+                throw new IOException(e.getMessage(), e);
             }
         }
         // Return the preconfigured SSLSocket

src/java.rmi/share/classes/javax/rmi/ssl/SslRMIServerSocketFactory.java

@@ -185,8 +185,7 @@ public SslRMIServerSocketFactory(
             } catch (Exception e) {
                 final String msg = "Unable to check if the cipher suites " +
                         "and protocols to enable are supported";
-                throw (IllegalArgumentException)
-                new IllegalArgumentException(msg).initCause(e);
+                throw new IllegalArgumentException(msg, e);
             }
         }
 

src/java.rmi/share/classes/sun/rmi/log/ReliableLog.java

@@ -285,8 +285,7 @@ public synchronized void update(Object value, boolean forceToDisk)
         } catch (IOException e) {
             throw e;
         } catch (Exception e) {
-            throw (IOException)
-                new IOException("write update failed").initCause(e);
+            throw new IOException("write update failed", e);
         }
         log.sync();
 
@@ -547,8 +546,7 @@ private void openLogFile(boolean truncate) throws IOException {
                    new LogFile(logName, "rw") :
                    logClassConstructor.newInstance(logName, "rw"));
         } catch (Exception e) {
-            throw (IOException) new IOException(
-                "unable to construct LogFile instance").initCause(e);
+            throw new IOException("unable to construct LogFile instance", e);
         }
 
         if (truncate) {