Resolve 2 sonarcloud issues

The following sonarcloud issues have been resolved:
https://sonarcloud.io/project/issues?id=jsonurl_jsonurl-java&issues=AXFhj06oRhxtzbnQIFCb&open=AXFhj06oRhxtzbnQIFCb

https://sonarcloud.io/project/issues?id=jsonurl_jsonurl-java&issues=AXFhj05tRhxtzbnQIFCN&open=AXFhj05tRhxtzbnQIFCN

Author: dmaccormack

module/jsonurl-core/src/main/java/org/jsonurl/JsonUrl.java

@@ -150,7 +150,9 @@ private static final String string(
                 char c;
                 int b;
 
-                switch (c = s.charAt(i)) {
+                c = s.charAt(i);
+
+                switch (c) {
                 case '\'':
                     if (quoted) {
                         needEndQuote = false;

module/jsonurl-core/src/main/java/org/jsonurl/NumberBuilder.java

@@ -295,7 +295,9 @@ public boolean parse(CharSequence s, int start, int stop) {
             decIndexStop = pos = digits(s, pos + 1, stop);
         }
 
-        switch (exponentType = getExponentType(s, pos, stop)) {
+        exponentType = getExponentType(s, pos, stop);
+
+        switch (exponentType) {
         case JUST_VALUE:
             expIndexStart = pos + 1;
             pos = expIndexStop = digits(s, expIndexStart, stop);