无法解析符号“MoreObjects”

Question

我有这个旧的遗留代码：

依赖

com.google.guava:guava:15.0

@Entity
@Table(name = "profiles")
public class Profile {
    @Id
    @Column(name = "id", nullable = false)
    private UUID id;
    @JoinColumn(
    name = "recipient_profile")
    private Profile recipientProfile;
    ....
}

@Entity
@Table(name = "standalone_credit")
public class StandaloneCredit {
    @Id
    @Column(name = "id", nullable = false)
    private UUID id;
    @JoinColumn(name = "recipient_profile_internal_id")
    private Profile recipientBusinessProfile;
    ....
}

import com.google.common.base.MoreObjects;
StandaloneCredit credit;

Profile recipientProfile =
        MoreObjects.firstNonNull(credit.getRecipientProfile(), credit.getRecipientBusinessProfile());

com.google.guava:guava:15.0

是

implementation 'org.springframework.cloud:spring-cloud-starter-netflix-hystrix:2.2.10.RELEASE'

的依赖项 如何在不破坏代码逻辑的情况下用核心 Java 代码实现替换

MoreObjects

？

Answer 1

这个可以直接替换为

Objects.requireNonNullElse

:

Profile recipientProfile =
        Objects.requireNonNullElse(credit.getRecipientProfile(), credit.getRecipientBusinessProfile());