RequiredArgsConstructor with custom assignment

Question

I'm curious if it's possible to assign a custom value during a constructor call using @RequiredArgsConstructor. I.e.

private String value1;
private String value2;
private String value3;

public MyConstructor(String value1, String value2) {
    this.value1 = value1;
    this.value2 = value2;
    this.value3 = createString();
}

Instead I'll be looking for:

@RequiredArgsConstructor
public class MyConstructor {
    @NonNull
    private String value1;
    @NonNull
    private String value2;
    private String value3;

    private String createString() {
        return "test";
    }
}

This might help -> [Is there any "PostConstruct" feature of lombok?](https://stackoverflow.com/a/67815143/7804477) — Gautham M, Feb 23 '22 at 05:00

score 1 · Accepted Answer · answered Feb 28 '22 at 10:52

1

You can assign createString() directly in the definition of the attribute. Therefore, when a new instance is created, also the value3 is initialized.

@RequiredArgsConstructor
public class MyConstructor {
    @NonNull
    private String value1;
    @NonNull
    private String value2;
    private String value3 = createString();

    private String createString() {
        return "test";
    }
}

answered Feb 28 '22 at 10:52

frascu

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Does this happen after the constructor? – user3509528 Mar 04 '22 at 19:38
Yes, when the object is created – frascu Mar 04 '22 at 20:10
Did my answer help you? or do you want me to add something to my answer? otherwise, feel free to accept my answer if you like. – frascu Mar 23 '22 at 14:15
Hey sorry for not getting back to you on this. Yeah this helped me, thanks for your answer. – user3509528 Mar 24 '22 at 15:53

RequiredArgsConstructor with custom assignment

1 Answers1