Difference between @size(max = value ) and @min(value) and @max(value)

Question

I want to do some domain validation. In my object I have one integer.

Now my question is: if I write

@Min(SEQ_MIN_VALUE)
@Max(SEQ_MAX_VALUE)
private Integer sequence;

and

 @Size(min = 1, max = NAME_MAX_LENGTH)
 private Integer sequence;

If it's an integer which one is proper for domain validation?
Can anybody explain me what is the difference between them?

Thanks.

What is your reason for using different constants? Why using NAME_MAX_LENGTH instead of the above used SEQ_MAX_VALUE in this question? If there is non, I would recommend using the same as to not distract from the core of the question. — Simeon, Feb 01 '21 at 10:36

score 159 · Accepted Answer · edited Aug 31 '16 at 10:48

159

@Min and @Max are used for validating numeric fields which could be String(representing number), int, short, byte etc and their respective primitive wrappers.

@Size is used to check the length constraints on the fields.

As per documentation @Size supports String, Collection, Map and arrays while @Min and @Max supports primitives and their wrappers. See the documentation.

edited Aug 31 '16 at 10:48

okocian

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answered Jun 25 '12 at 13:12

Sunil Chavan

2,934
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score 25 · Answer 2 · edited Mar 14 '14 at 12:35

package com.mycompany;

import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;

public class Car {

    @NotNull
    private String manufacturer;

    @NotNull
    @Size(min = 2, max = 14)
    private String licensePlate;

    @Min(2)
    private int seatCount;

    public Car(String manufacturer, String licencePlate, int seatCount) {
        this.manufacturer = manufacturer;
        this.licensePlate = licencePlate;
        this.seatCount = seatCount;
    }

    //getters and setters ...
}

@NotNull, @Size and @Min are so-called constraint annotations, that we use to declare constraints, which shall be applied to the fields of a Car instance:

manufacturer shall never be null

licensePlate shall never be null and must be between 2 and 14 characters long

seatCount shall be at least 2.

OP is asking about `@Size` applied to an `Integer`, I think that's the point of his confusion. Is it even legal to apply it to an integer? It might have the semantics similar to those in an RDMS -- digit count. — Marko Topolnik, Jun 25 '12 at 12:46
can u pls tell me difference between @size(max = value ) and @min(value) @max(value) — JOHND, Jun 25 '12 at 13:03

score 8 · Answer 3 · answered Feb 01 '21 at 12:06

From the documentation I get the impression that in your example it would be intended to use:

@Range(min= SEQ_MIN_VALUE, max= SEQ_MAX_VALUE)

Checks whether the annotated value lies between (inclusive) the specified minimum and maximum. Supported data types:

BigDecimal, BigInteger, CharSequence, byte, short, int, long and the respective wrappers of the primitive types

Difference between @size(max = value ) and @min(value) and @max(value)

3 Answers3

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