spring-boot-rest/spring-mvc-java/src/main/java/com/baeldung/model/ValidatedPhone.java

package com.baeldung.model;

import com.baeldung.customvalidator.ContactNumberConstraint;

public class ValidatedPhone {

    @ContactNumberConstraint
    private String phone;

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    @Override
    public String toString() {
        return phone;
    }
}