[Java Notes] 23 design modes (incomplete)

1. Single Case design mode

Singleton design Pattern: guarantees that a class has only one instance and provides a global access point to access it.

1) Privatization of construction methods

2) Declare an object of this class

3) Provide an external static method to obtain an object instance

For example:

Class singleton{

private static Singletho1 s = new Singletho1 ();

Private Singletho1 () {}

public static Singletho1 getinstance () {

return s;

}

}

2. Template approach mode (Templete method)

Template method Pattern: Defines the skeleton of an algorithm in an operation, and delays the implementation of some mutable parts into subclasses. Template method pattern allows subclasses to be unchanged

The structure of an algorithm can redefine some specific steps of the algorithm.

[Java Notes] 23 design modes (incomplete)