java解惑之动物庄园

package ch3_puzzlers_with_character.puzzle_13;public class AnimalFarm {    public static void main(String[] args) {        final String pig = "length: 10";        final String dog = "length: " + pig.length();        System.out.println("Animals are equal: "+ pig == dog);        // out: false, 先执行加法，再执行==，        //java操作符的操作数是从左到右求值的        //等价于        //System.out.println(("Animals are equal: "+ pig) == dog);                System.out.println("Animals are equal: "+ (pig == dog));        //out: Animals are equal: false    }}