Java method for judging whether an object is empty of includes null ''
- 2021-07-24 10:59:23
- OfStack
In this paper, we share the specific code of Java to judge whether the object is empty for your reference. The specific contents are as follows
package com.gj5u.publics.util;
import java.util.List;
/**
* Judge whether the object is empty or not
*
* @author Rex
*
*/
public class EmptyUtil
{
/**
* Judge that the object is empty
*
* @param obj
* Object name
* @return Whether it is empty or not
*/
@SuppressWarnings("rawtypes")
public static boolean isEmpty(Object obj)
{
if (obj == null)
{
return true;
}
if ((obj instanceof List))
{
return ((List) obj).size() == 0;
}
if ((obj instanceof String))
{
return ((String) obj).trim().equals("");
}
return false;
}
/**
* Judge that the object is not empty
*
* @param obj
* Object name
* @return Whether it is not empty
*/
public static boolean isNotEmpty(Object obj)
{
return !isEmpty(obj);
}
}