Design patterns y并不意味着Builder允许您实例化一个目标类，然后随着时间的推移对其进行修改。如果有很多依赖项，请查看此链接，我会说这正是您需要构造函数的时候。。。您应该使用依赖项注入来注入这些依赖项。 new ObjectBuilder().withParam1(1

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y并不意味着

Builder

允许您实例化一个目标类，然后随着时间的推移对其进行修改。如果有很多依赖项，请查看此链接，我会说这正是您需要构造函数的时候。。。您应该使用依赖项注入来注入这些依赖项。

new ObjectBuilder().withParam1(1).withParam4(4).withParam19(19).build();

new Foo(1,2,3,4,5,6,7,8,9,10,11,12)

Foo.newBuilder()
   .bar(1)
   .bar(2)
   .quux(3)
   ...
   .build()

new Pipeline(
    new Sequence(
        new Stage(
            new StageFunction() {
                public function execute() {...}
            }
        ),
        new Stage(
            new StageFunction() {
                public function execute() {...}
            }
        )
    )
)

Pipeline.newBuilder()
    .sequence()
        .stage(new StageFunction () {
            public function execute() {...}
        })
        .stage(new StageFunction () {
           public function execute() {...}
        })
    .build()

// a class with ctor that takes lots of params
class Params
{
    Params(int,int,int,String,char,boolean,int){}
}

// We dont need a builder.
// A builder will do the same following thing.
int p1 = 20;
int p2 = 40 + 40;
int p3 = (67 >> 1) * 3;
String p4 = "go" + "to" + "church";
char p5 = ' ' == 32 ? '5' : '7';
boolean p6 = true;
int p7 = MATCH_PARAMS;
new Params(p1,p2,p3,p4,p5,p6,p7);

//There is also this design pattern
new Params(
    20,
    40 + 40,
    (67 >> 1) * 3,
    "go" + "to" + "church",
    ' ' == 32 ? '5' : '7',
    true,
    MATCH_PARAMS
   );