Java中枚举的写法和用法

package com.tomtop.application.libraries.constentEnum;
/**     
 * 包材领用状态枚举类
 * @author  zeng.xiao.yan    
 * @date  Jun 5, 2017 1:04:40 PM  
 * @version  V1.0    
 */
public enum UseStatusEnum {
	PACKING_NOT_USE(1),  // 未领用
	PACKING_HAS_USED(2),  // 已领用
	PACKING_BACK_USE(3);  // 已打回
	
	private Integer useStatus;
	private UseStatusEnum(int useStatus) {
		this.useStatus = useStatus;
	}
	public Integer getUseStatus() {
		return useStatus;
	}
}

productPackingRecord.setUseStatus(UseStatusEnum.PACKING_NOT_USE.getUseStatus()); //设为未领用状态