JAVA逻辑判断工具类

在开发过程中，经常需要对“对象”、Map、Collection（List，Set）、数组、字符串判断是否为空，是否为null。以下是我工作中常用的一个逻辑判断工具类。

 

import java.util.Collection;
import java.util.Map;

/**
 * @Description: 简单逻辑判断
 * @author: LeoHua
 * @date 2011-3-7 下午05:30:13
 */
public class LogicUtil {

 @SuppressWarnings("unchecked")
 public static boolean isNullOrEmpty(Collection collection) {
  if (null == collection || 0 == collection.size()) {
   return true;
  } else {
   return false;
  }
 }

 public static boolean isNotNullAndEmpty(Collection collection) {
  return !isNullOrEmpty(collection);
 }

 @SuppressWarnings("unchecked")
 public static boolean isNullOrEmpty(Map map) {
  if (null == map || 0 == map.size()) {
   return true;
  } else {
   return false;
  }
 }

 public static boolean isNotNullAndEmpty(Map map) {
  return !isNullOrEmpty(map);
 }

 public static boolean isNullOrEmpty(Object[] objects) {
  if (null == objects || 0 == objects.length) {
   return true;
  } else {
   return false;
  }
 }

 public static boolean isNotNullAndEmpty(Object[] objects) {
  return !isNullOrEmpty(objects);
 }

 public static boolean isNull(Object object) {
  if (object == null) {
   return true;
  } else {
   return false;
  }
 }

 public static boolean isNotNull(Object Object) {
  return !isNull(Object);
 }

 public static boolean isNullOrEmpty(String subject) {
  if (null == subject || “”.equals(subject)) {
   return true;
  } else {
   return false;
  }
 }

 public static boolean isNotNullAndEmpty(String subject) {
  return !isNullOrEmpty(subject);
 }
}