当value不为空时如何启用javax注释，当value为空时如何禁用javax注释？

import javax.annotation.Nullable;

public class MyClass {
    @Nullable
    private String value;

    public void setValue(@Nullable String value) {
        this.value = value;
    }
}

import javax.annotation.Nonnull;

public class MyClass {
    @Nonnull
    private String value;

    public void setValue(@Nonnull String value) {
        this.value = value;
    }
}