8286399: Address possibly lossy conversions in JDK Build Tools

Reviewed-by: rriggs, joehw

make/jdk/src/classes/build/tools/charsetmapping/EUC_TW.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2010, 2022, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -119,7 +119,7 @@ static void genClass(String pkg, String args[]) throws Exception
                     indexC2B[e.cp>>8] = 1;
                 } else {
                     indexC2BSupp[(e.cp&0xffff)>>8] = 1;
-                    suppFlag[e.bs] |= (1 << plane);
+                    suppFlag[e.bs] |= (byte) (1 << plane);
                 }
             }
 

make/jdk/src/classes/build/tools/generatebreakiteratordata/RuleBasedBreakIteratorBuilder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2022, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1273,7 +1273,7 @@ else if (c == '/') {
         for (int i = 0; i < decisionPointList.size(); i++) {
             int rowNum = decisionPointList.elementAt(i).intValue();
             state = tempStateTable.elementAt(rowNum);
-            state[numCategories] |= END_STATE_FLAG;
+            state[numCategories] |= (short) END_STATE_FLAG;
             if (sawEarlyBreak) {
                 state[numCategories] |= LOOKAHEAD_STATE_FLAG;
             }
@@ -1580,7 +1580,7 @@ private void backfillLoopingStates() {
                 }
 
                 // clear out the backfill part of the flag word
-                state[numCategories] &= ALL_FLAGS;
+                state[numCategories] &= (short) ALL_FLAGS;
 
                 // then fill all zero cells in the current state with values
                 // from the corresponding cells of the fromState