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poo:laboratoare:11 [2025/12/14 17:32] george.tudor1906 |
poo:laboratoare:11 [2025/12/14 17:54] (current) george.tudor1906 |
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| ===== Laboratorul 11 – Design Patterns (1) ===== | ===== Laboratorul 11 – Design Patterns (1) ===== | ||
| + | |||
| + | <hidden> | ||
| + | {{:poo:laboratoare:rezolvare_dp_catalog.zip|}} | ||
| + | </hidden> | ||
| === Problema 1 - Singleton === | === Problema 1 - Singleton === | ||
| Line 263: | Line 267: | ||
| } | } | ||
| </code> | </code> | ||
| - | |||
| - | === Breviar - Builder Pattern === | ||
| - | |||
| - | <code java> | ||
| - | public class User { | ||
| - | private final String firstName; | ||
| - | private final String lastName; | ||
| - | private int age; | ||
| - | private String phone; | ||
| - | private String address; | ||
| - | |||
| - | private User(UserBuilder builder) { | ||
| - | this.firstName = builder.firstName; | ||
| - | this.lastName = builder.lastName; | ||
| - | this.age = builder.age; | ||
| - | this.phone = builder.phone; | ||
| - | this.address = builder.address; | ||
| - | } | ||
| - | |||
| - | public static class UserBuilder { | ||
| - | private final String firstName; | ||
| - | private final String lastName; | ||
| - | private int age; | ||
| - | private String phone; | ||
| - | private String address; | ||
| - | |||
| - | public UserBuilder(String firstName, String lastName) { | ||
| - | this.firstName = firstName; | ||
| - | this.lastName = lastName; | ||
| - | } | ||
| - | |||
| - | public UserBuilder age(int age) { | ||
| - | this.age = age; | ||
| - | return this; | ||
| - | } | ||
| - | |||
| - | public UserBuilder phone(String phone) { | ||
| - | this.phone = phone; | ||
| - | return this; | ||
| - | } | ||
| - | |||
| - | public UserBuilder address(String address) { | ||
| - | this.address = address; | ||
| - | return this; | ||
| - | } | ||
| - | |||
| - | public User build() { | ||
| - | return new User(this); | ||
| - | } | ||
| - | } | ||
| - | |||
| - | public static void main(String[] args) { | ||
| - | User user1 = new User.UserBuilder("Lokesh", "Gupta") | ||
| - | .age(30) | ||
| - | .phone("1234567") | ||
| - | .address("Fake address 1234") | ||
| - | .build(); | ||
| - | |||
| - | User user2 = new User.UserBuilder("Jack", "Reacher") | ||
| - | .age(40) | ||
| - | .phone("5655") | ||
| - | //no address | ||
| - | .build(); | ||
| - | } | ||
| - | } | ||
| - | </code> | ||
| - | |||
