找不到符号错误（调用方法）

Question

我遇到的错误是

Error:cannot find symbol
  symbol:  variable compareTo
  location:variable tim of type Time

发生错误的代码是

public String difference(Time tim)
{
      if(tim.compareTo==1)
{
      tim.minute = 0;
}
      //other code
}

我的compareTo是

public int compareTo(Object other)
{
    if (((Time)other).getHour()<hour)
    {
     return 1;
    }
 //and other code that repeat for return -1 and 0
}

Answer 1

调用compareTo方法的语法错误。如果没有括号()，Java会将其解释为类变量。尝试

if (compareTo(tim) == 1)