builder方法

src/main/java/com/github/hcsp/encapsulation/User.java

@@ -29,10 +29,14 @@ public String getAddress() {
         return address;
     }
 
+
+
     User(String firstName, String lastName, String phoneNumber, String address) {
         this.firstName = firstName;
         this.lastName = lastName;
         this.phoneNumber = phoneNumber;
         this.address = address;
     }
+
+
 }

src/main/java/com/github/hcsp/encapsulation/UserBuilder.java

@@ -1,6 +1 @@
-package com.github.hcsp.encapsulation;
-
-public class UserBuilder {
-    // 请在这里使用builder模式建造User对象
-    // 所需的接口请参阅UserBuilderTest测试类
-}
+package com.github.hcsp.encapsulation;public final class UserBuilder {    private String firstName;    private String lastName;    private String phoneNumber;    private String address;    public static UserBuilder anUser() {        return new UserBuilder();    }    public UserBuilder firstName(String firstName) {        this.firstName = firstName;        return this;    }    public UserBuilder lastName(String lastName) {        this.lastName = lastName;        return this;    }    public UserBuilder phoneNumber(String phoneNumber) {        this.phoneNumber = phoneNumber;        return this;    }    public UserBuilder address(String address) {        this.address = address;        return this;    }    public User build() {        return new User(firstName, lastName, phoneNumber, address);    }}