Example.java:17: warning: int is boxed into Integer
        Integer i = 1;
                    ^
Example.java:19: warning: Integer is unboxed into int
        int k = i;
                ^
Example.java:21: warning: int is boxed into Integer
        i = k + 3;
          ^
Example.java:23: warning: int is boxed into Integer
        i = i + (k * v - 1);
          ^
Example.java:23: warning: Integer is unboxed into int
        i = i + (k * v - 1);
            ^
Example.java:23: warning: Integer is unboxed into int
        i = i + (k * v - 1);
                     ^
Example.java:25: warning: int is boxed into Integer
        i = i + wrap(k);
          ^
Example.java:25: warning: Integer is unboxed into int
        i = i + wrap(k);
            ^
Example.java:25: warning: Integer is unboxed into int
        i = i + wrap(k);
                    ^
Example.java:28: warning: assertion
        assert k > 0;
        ^
Example.java:31: warning: vararg method invocation
        varArg();
              ^
Example.java:36: warning: string in switch
        switch (h) {
               ^
Example.java:44: warning: enum in switch
        switch (sco) {
               ^
Example.java:50: warning: lambda expressions are not supported
        Callable<String> callable = () -> "done";
                                    ^
Example.java:53: warning: vararg method
    public static void varArg(String... values) {}
                       ^
Example.java:56: warning: int is boxed into Integer
    	return k;
    	       ^
Example.java:60: warning: int is boxed into Integer
    	u = k;
    	  ^
Example.java:64: warning: finalizers are not supported
    public void finalize() {}
                ^

Example.java:69: warning: default methods are not supported
    default String name() { return "unnamed"; }
                   ^
19 warnings