java構造器怎么寫，Java-構建器模式(Buider模式)

構建器模式完全可以代替javabean模式和重疊構造器模式，只是目前用的人非常少而已

public class Outer {private final String name;private final int age;public static class Inner{private final String name1;private int age1=0;public String getName1() {return name1;}public int getAge1() {return age1;}public Inner(String name){this.name1=name;}public Inner age(int val){this.age1=val;return this;}public Outer build(){return new Outer(this);}}private Outer(Inner neibu){name=neibu.name1;age=neibu.age1;}public String getName() {return name;}public int getAge() {return age;}}
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public static void main(String[] args) {Outer outer=new Outer.Inner("doublift").age(18).build();System.out.println(outer.getName());System.out.println(outer.getAge());     }