Pos to Neg/Neg to Pos [Resolved]

[Dillinger4]

Anyone know of a function in the Java API that returns an integer that can convert neg/pos or pos/neg? I can code it but id rather use a function if one exists.

/*
small prog to test formulas
formulas --> -/+ (-n == ~n + 1) or ((-n + 1) ~n == n)
+/- (n == ~n + 1) or ((n-1) ~n == (-n))
*/ 
  
  class progTest{
    public static void main(String[] args){

     if(args.length == 1){
       
         int n = Integer.parseInt(args[0]); 
          // n = ~n + 1; can use either
           n = n - 1;
           n = ~n; 
           System.out.println(n); 
      }else{
         System.out.println();
         System.out.println("Usage 1 arguement");
       }
     }
   }