Question

This is back to the beginning of Java 101, but I have this code here:

    if ((d==3)&&(City.walls[x--][y])){
        System.out.println ("Fourth Condition true");
        System.out.println (City.walls[x--][y]);
        return false;
    }

Even if City.walls[x--][y]) is false, and System.out.println confirms this by printing out false, it will still enter the if statement, no matter what. What am I doing wrong with the comparison? Thanks in advance.

Answer 1

You are using x–, which changes the value of x. First it returns the value, then it decrements the value:

int x = 5;
System.out.println(x--); //outputs 5
System.out.println(x);   //outputs 4

You probably want to say x-1