Java 疑问

package testequal;
public class TestEqual {
    public static void main(String args[]){
    Cat c1 = new Cat(1,2,3);
    Cat c2 = new Cat(1,2,3);
    System.out.println(c1 == c2);
    System.out.println(c1.equals(c2));
   
    String s1 = new String("hello");
    String s2 = new String("hello");
    System.out.println(s1 == s2);
    System.out.println(s1.equals(s2));
  }
}


class Cat{
    int color;
    int height;
    int weight;
   
    public Cat (int color, int height, int weight){
       this.color = color;
       this.weight = weight;
       this.height = height;
    }
    public boolean equals(Object obj){
        if (obj == null) return false;
        else{
            if (obj instanceof Cat){
                Cat c = (Cat)obj;
                if(c.color == this.color && c.height == this.height && c.weight == this weight){  //系统说我这里错了，但是不知道错在哪里了
                   return true;
            }
            }
        }
        return false;
    }
}


请问这个code错在哪里了？看不出来。。
   

this weight 少了个点，应该是this.weight