src/java.base/share/classes/sun/nio/cs/HKSCS.java

@@ -51,11 +51,11 @@
                           char[][] b2cBmp, char[][] b2cSupp)
         {
             // super(cs, 0.5f, 1.0f);
             // need to extends DoubleByte.Decoder so the
             // sun.io can use it. this implementation
-            super(cs, 0.5f, 1.0f, null, null, 0, 0);
+            super(cs, 0.5f, 1.0f, null, null, 0, 0, true);
             this.big5Dec = big5Dec;
             this.b2cBmp = b2cBmp;
             this.b2cSupp = b2cSupp;
         }
 

@@ -237,11 +237,11 @@
         protected Encoder(Charset cs,
                           DoubleByte.Encoder big5Enc,
                           char[][] c2bBmp,
                           char[][] c2bSupp)
         {
-            super(cs, null, null);
+            super(cs, null, null, true);
             this.big5Enc = big5Enc;
             this.c2bBmp = c2bBmp;
             this.c2bSupp = c2bSupp;
         }
 

@@ -387,10 +387,37 @@
                 }
             }
             return dp;
         }
 
+        public int encodeFromUTF16(byte[] src, int sp, int len, byte[] dst) {
+            int dp = 0;
+            int sl = sp + len;
+            int dl = dst.length;
+            while (sp < sl) {
+                char c = StringUTF16.getChar(src, sp++);
+                int bb = encodeChar(c);
+                if (bb == UNMAPPABLE_ENCODING) {
+                    if (!Character.isHighSurrogate(c) || sp == sl ||
+                        !Character.isLowSurrogate(StringUTF16.getChar(src,sp)) ||
+                        (bb = encodeSupp(Character.toCodePoint(c, StringUTF16.getChar(src, sp++))))
+                        == UNMAPPABLE_ENCODING) {
+                        dst[dp++] = repl[0];
+                        if (repl.length > 1)
+                            dst[dp++] = repl[1];
+                        continue;
+                    }
+                }
+                if (bb > MAX_SINGLEBYTE) { // DoubleByte
+                    dst[dp++] = (byte)(bb >> 8);
+                    dst[dp++] = (byte)bb;
+                } else {                   // SingleByte
+                    dst[dp++] = (byte)bb;
+                }
+            }
+            return dp;
+        }
 
         static char[] C2B_UNMAPPABLE = new char[0x100];
         static {
             Arrays.fill(C2B_UNMAPPABLE, (char)UNMAPPABLE_ENCODING);
         }