Java 为什么我的arraylist在没有静态字段的情况下包含n个相同的元素？

我正在尝试将对象添加到arraylist。这些对象都不包含任何静态字段或静态方法，但在更新arraylist时，所有元素都采用“new”值。此外，每次循环时都会创建一个新实例，因此我不认为我一直在添加相同的对象

ArrayList<Integer> rewards = new ArrayList<Integer>(); 
ArrayList<ArrayList<Route>> neighbours = new ArrayList<ArrayList<Route>>();

for(int i=0; i<10; i++)
{
    Generate1Neighbour neighbour = new Generate1Neighbour(testDataFile,amp2Solution,randomGenerator,i);
    System.out.println("Generated neighbour (Reward " + getSolutionReward(neighbour.solution)+ "): " + neighbour.solution.toString());
    rewards.add(getSolutionReward(neighbour.solution));
    neighbours.add(neighbour.solution);
}

ArrayList奖励=新建ArrayList（）；
ArrayList邻居=新的ArrayList（）；
对于（int i=0；我不知道您刚才是否已经问过这个问题了？您的代码也应该正常工作。@EJP问题中指出，
奖励
包含不同的元素。什么是
amp2Solution
，以及
生成了什么（）
constructor如何处理？请提供
generate1neighbor的代码class@EJP我编辑了这个问题，希望这有帮助！
public ArrayList<Route> solution;

public static int getSolutionReward(ArrayList<Route> solution)
{
    int totalReward = 0;
    for(Route route : solution)
    {
        totalReward += route.getReward();
    }
    return totalReward;
}

public Generate1Neighbour(DataFile testDataFile, ArrayList<Route> Sol, Random randomGen, int q_tabu) throws IOException
{
    System.out.println("Starting Tabu procedure ");
    neighbourhoodSize = "Small";
    solution = Sol;
    S_Comp = new ArrayList<MyNodesData>();
    startPoint = testDataFile.getStartPoint();
    finishPoint = testDataFile.getFinishPoint();
    maxDuration = testDataFile.getMaxDuration();
    randomGenerator = randomGen;
    toRemoveRVI = 3;

    //----------------(A) : Initialization---------------- 
    parameterSet = new ParameterSet(neighbourhoodSize, testDataFile);
    generateSComp(testDataFile, solution, S_Comp);

    //---------Generating neighborhood solutions---------   //Generate number of neighborhood solutions (feasible and 
                                                            //infeasible) to the current solution, based on current
                                                            //tabu parameters.

    routeNumbers = twoRandomTours(solution, randomGenerator);   
    r1 = solution.get(routeNumbers[0]);
    r2 = solution.get(routeNumbers[1]);         

    solution = insertInS(solution, routeNumbers, maxDuration, startPoint, finishPoint, S_Comp, SE, successfulInsert);           
    if(!successfulInsert)
    {
        solution = exchangeWithSComp(solution, parameterSet, routeNumbers, maxDuration, S_Comp, randomGenerator);       
        new RoutesToXLS(solution, "Tabu3");
    }
    else
    {
        new RoutesToXLS(solution, "Tabu2");
    }

    //----------------(B) : Improvement---------------- 

    solution = balance(solution,r1,r2);     
    if(!successfulBalance)
    { 
        exchangeBetweenTours(r1,r2);                    
        new RoutesToXLS(solution, "Tabu5");
    }
    else
    {
        new RoutesToXLS(solution, "Tabu4");
    }
    if(q_tabu % parameterSet.getChi() == 0 && q_tabu!=0)        
    {   
        solution = RVI(solution, routeNumbers, maxDuration, startPoint, finishPoint, S_Comp, SE, randomGenerator, toRemoveRVI, successfulInsert);
        new RoutesToXLS(solution,"AfterRVI");
    }
}