In public void A1(int a,int b){ c = this.a+this.b; } You are ignoring the parameters you are passing to your method, and add the instance variables this.a and this.b instead. Change it to public void A1(int a,int b){ c = a+b; } in order to add the two arguments.
If your common statement same location xxx doesn’t need to be in if-else then put it out of the if-else. I guess you want this. if{ condition fails move it } else{ execute different condition and move it } same location xxx
It’s a time zone change on December 31st in Shanghai. See this page for details of 1927 in Shanghai. Basically at midnight at the end of 1927, the clocks went back 5 minutes and 52 seconds. So “1927-12-31 23:54:08” actually happened twice, and it looks like Java is parsing it as the later possible instant … Read more
Java is always pass-by-value. Unfortunately, when we deal with objects we are really dealing with object-handles called references which are passed-by-value as well. This terminology and semantics easily confuse many beginners. It goes like this: public static void main(String[] args) { Dog aDog = new Dog(“Max”); Dog oldDog = aDog; // we pass the object … Read more