Java Programming thought notes

1.

2.

3. For classes that you create, the default behavior of equals () is to compare references . So unless you override the Equals () method in your own class, it's not possible to show the behavior we want. P45

4. Java does not have sizeof. Because all data types are the same size in all machines. The most important reason to use sizeof in C + + is for porting. P56

5. Calling the constructor in the constructor P86

In a constructor, you can call another constructor with this, but you cannot call 2. In addition, the construction call must be placed at the very beginning, or the compiler will make an error.

In addition to the constructor, the compiler prohibits invoking the constructor in any other method.

6. Static

A non-static method cannot be called inside a static method, or vice versa. P86

7.

Java Programming thought notes