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/**
* 静态内部类Builder的好处
* 1、有多个参数，并且参数可选时适合使用
* 2、有多个参数，但是并不确定参数时适合使用
*/

public class MyBuilder {
private String name;
private String operationType;
private String opertiionMethod;

public MyBuilder(Builder builder) {
this.name = builder.name;
this.operationType = builder.operationType;
this.opertiionMethod = builder.operationMethod;
}

public static class Builder {
private String name;
private String operationType;
private String operationMethod;

public Builder() {
}

public Builder setName(String name) {
this.name = name;
return this;
}

public Builder setOperationType(String operationType) {
this.operationType = operationType;
return this;
}

public Builder setOperationMethod(String operationMethod) {
this.operationMethod = operationMethod;
return this;
}

public MyBuilder build() {
return new MyBuilder(this);
}
}

}
public void test() {
MyBuilder outer = new MyBuilder.Builder().setName("").setOperationMethod("").setOperationType("").build();
}