Donkey

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

@@ -1,5 +1,6 @@
 package com.github.hcsp.encapsulation;
 
+
 public class User {
     /** 用户的名 */
     private final String firstName;
@@ -35,4 +36,5 @@ public String getAddress() {
         this.phoneNumber = phoneNumber;
         this.address = address;
     }
+
 }

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

@@ -3,4 +3,33 @@
 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
-}
+    private String firstName;
+    private String lastName;
+    private String phoneNumber;
+    private String address;
+
+    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);
+    }
+
+}