다음은 재고에 제품을 추가하기 위해 내가 만든 Java 코드입니다. 팀장님이 코드가 효율적이지 않다고 알려줬는데, 제품 수가 증가하면 문제가 발생할 것 같아요. 이 문제를 방지하기 위해 코드를 수정하고 코드 내에서 변경사항을 완전히 구현할 수 있는 방법을 알려줄 수 있나요?
importjava.util.ArrayList;importjava.util.List;importjava.util.Random;publicclassProductInventory{privatestaticfinalList<Product>products=newArrayList<>();privatestaticfinalRandomrandom=newRandom();publicstaticvoidmain(String[]args){addProduct("Product1");addProduct("Product2");addProduct("Product3");System.out.println("All Products:");for(Productproduct:products){System.out.println("Name: "+product.getName()+", ID: "+product.getId());}}publicstaticvoidaddProduct(StringproductName){StringrandomId;booleanidIsUnique;longstartTime;longendTime;longduration;// Record start timestartTime=System.nanoTime();do{randomId=getRandomId();idIsUnique=true;for(Productproduct:products){if(product.getId().equals(randomId)){idIsUnique=false;System.out.println("ID "+randomId+" already exists. Generating a new ID.");break;}}}while(!idIsUnique);products.add(newProduct(productName,randomId));System.out.println("Added "+productName+" with ID: "+randomId);// Record end time and calculate durationendTime=System.nanoTime();duration=endTime-startTime;System.out.println("Time taken to add "+productName+": "+duration+" nanoseconds");}publicstaticStringgetRandomId(){return"ID"+random.nextInt(1000);}}// Product class to store product name and IDclassProduct{privatefinalStringname;privatefinalStringid;publicProduct(Stringname,Stringid){this.name=name;this.id=id;}publicStringgetName(){returnname;}publicStringgetId(){returnid;}}
응답
세트를 사용하여 제품 저장
importjava.util.HashSet;importjava.util.Random;importjava.util.Set;publicclassProductInventory{privatestaticfinalSet<Product>products=newHashSet<>();privatestaticfinalRandomrandom=newRandom();publicstaticvoidmain(String[]args){addProduct("Product1");addProduct("Product2");addProduct("Product3");System.out.println("All Products:");for(Productproduct:products){System.out.println("Name: "+product.getName()+", ID: "+product.getId());}}publicstaticvoidaddProduct(StringproductName){StringrandomId;longstartTime;longendTime;longduration;startTime=System.nanoTime();do{randomId=getRandomId();}while(!products.add(newProduct(productName,randomId)));System.out.println("Added "+productName+" with ID: "+randomId);endTime=System.nanoTime();duration=endTime-startTime;System.out.println("Time taken to add "+productName+": "+duration+" nanoseconds");}publicstaticStringgetRandomId(){return"ID"+random.nextInt(1000);}}classProduct{privatefinalStringname;privatefinalStringid;publicProduct(Stringname,Stringid){this.name=name;this.id=id;}publicStringgetName(){returnname;}publicStringgetId(){returnid;}@Overridepublicbooleanequals(Objectobj){if(this==obj)returntrue;if(obj==null||getClass()!=obj.getClass())returnfalse;Productproduct=(Product)obj;returnid.equals(product.id);}@OverridepublicinthashCode(){returnid.hashCode();}}