Key Points

  • Design patterns are solutions to common object-oriented design dilemmas.
  • Design patterns are divided into three categories: creational, behavioral, and structural.
  • Creational patterns abstract the instantiation process.
  • Behavioral patterns are concerned with algorithms and the assignment of responsibilities between objects.
  • Structural patterns are concerned with how classes and objects are combined to form larger structures.
  • A common association is illustrated by connecting objects with a thin line.
  • Composition is a relationship among objects that share a similar lifeline.
  • Aggregation is a whole made up of independent parts.
  • Class diagrams, sequential diagrams, and interaction diagrams can be used to design collaborations.
  • UML stands ...

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