代码审查不规范：

Unlikely argument type for equals(): int seems to be unrelated to Long

==check==

package code_check;

public class Obj
{

	public Obj()
	{
		
	}
	
	private Long mail;

	public Long getMail()
	{
		return mail;
	}

	public void setMail(Long mail)
	{
		this.mail = mail;
	}

}

package code_check;

public class ObjCheck
{

	public ObjCheck()
	{
		
	}

	public static void main(String[] args)
	{
		Obj obj = new Obj();
		obj.setMail(new Long(1));
		
		//Long <> 1
		if (obj.getMail().equals(1))
		{
			System.out.println("ok!");
		}
		else
		{
			System.out.println("no!");
		}
		
		//Long <> 1
		if (obj.getMail() == 1)
		{
			System.out.println("ok!");
		}
		else
		{
			System.out.println("no!");
		}
	}

}

代码已经离我远去了，看到了蛮记录一下。