java: avoid Integer(String), use parseInt

examples/java/calc/Calc.java:1531: warning: [deprecation] Integer(String) in Integer has been deprecated
          yylval = new Integer(st.sval);
                   ^

* examples/java/calc/Calc.y, examples/java/simple/Calc.y,
* tests/calc.at, tests/scanner.at: Use Integer.parseInt.

examples/java/calc/Calc.y

@@ -205,7 +205,7 @@ class CalcLexer implements Calc.Lexer {
       end.column = 0;
       return EOL;
     case StreamTokenizer.TT_WORD:
-      yylval = new Integer(st.sval);
+      yylval = Integer.parseInt(st.sval);
       end.set(reader.getPreviousPosition());
       return NUM;
     case ' ': case '\t':

examples/java/simple/Calc.y

@@ -116,7 +116,7 @@ class CalcLexer implements Calc.Lexer {
     case StreamTokenizer.TT_EOL:
       return (int) '\n';
     case StreamTokenizer.TT_WORD:
-      yylval = new Integer(st.sval);
+      yylval = Integer.parseInt(st.sval);
       return NUM;
     default:
       return ttype;