diff --git a/jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/ISO2022.java b/jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/ISO2022.java
index 983d57d2786..7c56c8e5fbc 100644
--- a/jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/ISO2022.java
+++ b/jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/ISO2022.java
@@ -395,7 +395,7 @@ abstract class ISO2022
 
         protected final byte maximumDesignatorLength = 4;
 
-        protected String SODesig,
+        protected byte[] SODesig,
                          SS2Desig = null,
                          SS3Desig = null;
 
@@ -426,21 +426,18 @@ abstract class ISO2022
             SS3DesDefined = false;
         }
 
-        private int unicodeToNative(char unicode, byte ebyte[])
-        {
+        private int unicodeToNative(char unicode, byte ebyte[]) {
             int index = 0;
-            byte        tmpByte[];
             char        convChar[] = {unicode};
             byte        convByte[] = new byte[4];
             int         converted;
 
             try{
                 CharBuffer cc = CharBuffer.wrap(convChar);
-                ByteBuffer bb = ByteBuffer.allocate(4);
+                ByteBuffer bb = ByteBuffer.wrap(convByte);
                 ISOEncoder.encode(cc, bb, true);
                 bb.flip();
                 converted = bb.remaining();
-                bb.get(convByte,0,converted);
             } catch(Exception e) {
                 return -1;
             }
@@ -449,9 +446,8 @@ abstract class ISO2022
                 if (!SODesDefined) {
                     newSODesDefined = true;
                     ebyte[0] = ISO_ESC;
-                    tmpByte = SODesig.getBytes();
-                    System.arraycopy(tmpByte,0,ebyte,1,tmpByte.length);
-                    index = tmpByte.length+1;
+                    System.arraycopy(SODesig, 0, ebyte, 1, SODesig.length);
+                    index = SODesig.length + 1;
                 }
                 if (!shiftout) {
                     newshiftout = true;
@@ -465,9 +461,8 @@ abstract class ISO2022
                         if (!SS2DesDefined) {
                             newSS2DesDefined = true;
                             ebyte[0] = ISO_ESC;
-                            tmpByte = SS2Desig.getBytes();
-                            System.arraycopy(tmpByte, 0, ebyte, 1, tmpByte.length);
-                            index = tmpByte.length+1;
+                            System.arraycopy(SS2Desig, 0, ebyte, 1, SS2Desig.length);
+                            index = SS2Desig.length + 1;
                         }
                         ebyte[index++] = ISO_ESC;
                         ebyte[index++] = ISO_SS2_7;
@@ -477,9 +472,8 @@ abstract class ISO2022
                         if(!SS3DesDefined){
                             newSS3DesDefined = true;
                             ebyte[0] = ISO_ESC;
-                            tmpByte = SS3Desig.getBytes();
-                            System.arraycopy(tmpByte, 0, ebyte, 1, tmpByte.length);
-                            index = tmpByte.length+1;
+                            System.arraycopy(SS3Desig, 0, ebyte, 1, SS3Desig.length);
+                            index = SS3Desig.length + 1;
                         }
                         ebyte[index++] = ISO_ESC;
                         ebyte[index++] = ISO_SS3_7;
@@ -560,7 +554,6 @@ abstract class ISO2022
              }
         }
 
-
         private CoderResult encodeBufferLoop(CharBuffer src,
                                              ByteBuffer dst)
         {
diff --git a/jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/ISO2022_CN_CNS.java b/jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/ISO2022_CN_CNS.java
index f9fe0417af0..af623c6c009 100644
--- a/jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/ISO2022_CN_CNS.java
+++ b/jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/ISO2022_CN_CNS.java
@@ -67,9 +67,9 @@ public class ISO2022_CN_CNS extends ISO2022 implements HistoricallyNamedCharset
         public Encoder(Charset cs)
         {
             super(cs);
-            SODesig = "$)G";
-            SS2Desig = "$*H";
-            SS3Desig = "$+I";
+            SODesig =  new byte[] {'$', ')', 'G' };
+            SS2Desig = new byte[] {'$', '*', 'H' };
+            SS3Desig = new byte[] {'$', '+', 'I' };
 
             try {
                 Charset cset = Charset.forName("EUC_TW"); // CNS11643
diff --git a/jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/ISO2022_CN_GB.java b/jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/ISO2022_CN_GB.java
index 1faaa537d7f..aca60b5f255 100644
--- a/jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/ISO2022_CN_GB.java
+++ b/jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/ISO2022_CN_GB.java
@@ -68,7 +68,7 @@ public class ISO2022_CN_GB extends ISO2022 implements HistoricallyNamedCharset
         public Encoder(Charset cs)
         {
             super(cs);
-            SODesig = "$)A";
+            SODesig = new byte[] { '$', ')', 'A'};
 
             try {
                 Charset cset = Charset.forName("EUC_CN"); // GB2312
diff --git a/jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/ISO2022_KR.java b/jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/ISO2022_KR.java
index 6d96acde6f1..9ee19cbf996 100644
--- a/jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/ISO2022_KR.java
+++ b/jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/ISO2022_KR.java
@@ -81,11 +81,9 @@ implements HistoricallyNamedCharset
 
     private static class Encoder extends ISO2022.Encoder {
 
-        public Encoder(Charset cs)
-        {
+        public Encoder(Charset cs) {
             super(cs);
-            SODesig = "$)C";
-
+            SODesig = new byte[] {'$', ')', 'C' };
             try {
                 ISOEncoder = ksc5601_cs.newEncoder();
             } catch (Exception e) { }