Are object types in java determined at runtime?

Question

Java

Are object types determined at runtime? Why can't it be compiled like this then? (The type of the object is still unknown, sort of).

class Solution {
  public static void main(String[] args) {
    String object = new Solution(); //	ошибка компиляции (несоответствие типов)
  }
}

Answer 1

No, Java has static typing. The types are known at compile time. In your example, the types of the object and variable are known and do not match (and the type of the object cannot be cast to the type of the variable).