1195     public String toString() {
1196         int absYear = Math.abs(year);
1197         StringBuilder buf = new StringBuilder(9);
1198         if (absYear < 1000) {
1199             if (year < 0) {
1200                 buf.append(year - 10000).deleteCharAt(1);
1201             } else {
1202                 buf.append(year + 10000).deleteCharAt(0);
1203             }
1204         } else {
1205             buf.append(year);
1206         }
1207         return buf.append(month < 10 ? "-0" : "-")
1208             .append(month)
1209             .toString();
1210     }
1211 
1212     //-----------------------------------------------------------------------
1213     /**
1214      * Writes the object using a
1215      * <a href="../../serialized-form.html#java.time.Ser">dedicated serialized form</a>.
1216      * @serialData
1217      * <pre>
1218      *  out.writeByte(12);  // identifies a YearMonth
1219      *  out.writeInt(year);
1220      *  out.writeByte(month);
1221      * </pre>
1222      *
1223      * @return the instance of {@code Ser}, not null
1224      */
1225     private Object writeReplace() {
1226         return new Ser(Ser.YEAR_MONTH_TYPE, this);
1227     }
1228 
1229     /**
1230      * Defend against malicious streams.
1231      *
1232      * @param s the stream to read
1233      * @throws InvalidObjectException always
1234      */
1235     private void readObject(ObjectInputStream s) throws InvalidObjectException {

1195     public String toString() {
1196         int absYear = Math.abs(year);
1197         StringBuilder buf = new StringBuilder(9);
1198         if (absYear < 1000) {
1199             if (year < 0) {
1200                 buf.append(year - 10000).deleteCharAt(1);
1201             } else {
1202                 buf.append(year + 10000).deleteCharAt(0);
1203             }
1204         } else {
1205             buf.append(year);
1206         }
1207         return buf.append(month < 10 ? "-0" : "-")
1208             .append(month)
1209             .toString();
1210     }
1211 
1212     //-----------------------------------------------------------------------
1213     /**
1214      * Writes the object using a
1215      * <a href="{@docRoot}/serialized-form.html#java.time.Ser">dedicated serialized form</a>.
1216      * @serialData
1217      * <pre>
1218      *  out.writeByte(12);  // identifies a YearMonth
1219      *  out.writeInt(year);
1220      *  out.writeByte(month);
1221      * </pre>
1222      *
1223      * @return the instance of {@code Ser}, not null
1224      */
1225     private Object writeReplace() {
1226         return new Ser(Ser.YEAR_MONTH_TYPE, this);
1227     }
1228 
1229     /**
1230      * Defend against malicious streams.
1231      *
1232      * @param s the stream to read
1233      * @throws InvalidObjectException always
1234      */
1235     private void readObject(ObjectInputStream s) throws InvalidObjectException {