出现数组越界解决办法

 int num = 0;
	        for(int i=0;i<endWeigheArray.length;i++)
	        {
	        	int len = diamondpriceIdArray.length;
	        	num++;
	        	String id = num <= len ? diamondpriceIdArray[i] : "";
	        	
	        	TGolDiamondprice entity = this.golDiamondpriceBusiness.findById(id);
	        	
	        	if(null==entity)
	        	{
	        		entity = new TGolDiamondprice();
	        		entity.setDiamondpriceId(Tools.getUUID());
	        	}
	        	
	        }