Target with validation

Target.java

public class Target {

    private static final Pattern ALLOWED_REGEX = Pattern.compile("[a-zA-Z\\-_]*");

    private String code;
    private String name;
    private String publicIdentifier;

    public Target(String code, String name, String publicIdentifier) {
        validate(code, "code");
        validate(name, "name");
        validate(publicIdentifier, "publicIdentifier");
        validatePublicIdentifier(publicIdentifier);
        this.code = code;
        this.name = name;
        this.publicIdentifier = publicIdentifier;
    }

    private void validatePublicIdentifier(String publicIdentifier) {
        if(!ALLOWED_REGEX.matcher(publicIdentifier).matches()) {
            throw new IllegalArgumentException("Public identifier should only contains valid characters.");
        }
    }

    private void validate(String value, String parameterName) {
        if(value == null || value.trim().isEmpty()) {
            throw new IllegalArgumentException(parameterName + " should not be empty.");
        }
    }
}