Java 将 int 更改为整数时测试失败

Question

我有方法 electCouncillor 从数组 CouncillorsSet 中取出某个议员，将其放入某个 balcony 队列，从中获取额外的议员 balcony 并将其放回 CouncillorSet，以确定将从数组中取出哪个议员我有私有 int 字段 CouncillorNumber，然后我意识到我不能使用 int，因为每次我都使用该方法我必须重置 CouncillorNumber 值并且 int 不允许 null（如果我输入 0，它将始终使用数组中的第一个议员），所以我决定将其更改为整数，但出于某种原因测试失败了，我不知道为什么。

public class Player {
    private int id;
    private int councillorNumber;

    public void electCouncillor(Region region,GameBoard gameBoard){
//Gets a certain councillor from the array CouncillorSet
        Councillor councillor = gameBoard.getCouncillorsSet().get(councillorNumber);
//Adds that councillor to the queue Balcony
        region.getBalcony().add(councillor);
//Sets the councillor on top of the Balcony in the CouncillorSet
        gameBoard.setCouncillor(region.getBalcony().element());
//Removes the councillor on top of the balcony
        region.getBalcony().remove();
//Removes the councillor from CouncillorSet that was added to the balcony
        gameBoard.getCouncillorsSet().remove(councillorNumber);


    }
    public int getCouncillorNumber() {
        return councillorNumber;
    }
    public void setCouncillorNumber(int councillorNumber) {
        this.councillorNumber = councillorNumber;
    }

}

这是测试

@Test
    public void testElectCouncillor(){
        Player player = new Player(1);
        GameBoard gameBoard = new GameBoard();
//First i create 6 councillors to be used in the test
        Councillor councillor1 = new Councillor();
        Councillor councillor2 = new Councillor();
        Councillor councillor3 = new Councillor();
        Councillor councillor4 = new Councillor();
        Councillor councillor5 = new Councillor();
        Councillor councillor6 = new Councillor();
        councillor1.setColor(Color.BLACK);
        councillor2.setColor(Color.BLUE);
        councillor3.setColor(Color.ORANGE);
        councillor4.setColor(Color.PURPLE);
        councillor5.setColor(Color.WHITE);
        councillor6.setColor(Color.PINK);
//Then i add the first 4 councillors to a balcony
        Region region = gameBoard.getRegionCoast();
        Queue<Councillor> balcony = region.getBalcony();
        balcony.add(councillor1);
        balcony.add(councillor2);
        balcony.add(councillor3);
        balcony.add(councillor4);
//The i add the remaining two to the CouncillorSet of the GameBoard
        gameBoard.setCouncillorSet(new ArrayList<Councillor>());
        gameBoard.getCouncillorsSet().add(councillor5);
        gameBoard.getCouncillorsSet().add(councillor6);
//This gets the first element from CouncillorSet, which in this case is the councillor5 color white
        player.setCouncillorNumber(0);
        player.electCouncillor(region,gameBoard);
//After doing the method first i verify that the element in top of the queue is 
//now the councillor Blue
        assertEquals(Color.BLUE,region.getBalcony().element().getColor());
//Then i verify that the elements 0 and 1 from the CouncillorSet are the
//Pink and Black councillors respectively (before the method the pink
//councillor was the element 1)
        assertEquals(Color.BLACK,gameBoard.getCouncillorsSet().get(1).getColor());
        assertEquals(Color.PINK,gameBoard.getCouncillorsSet().get(0).getColor());
}

这是使用整数而不是 int 的方法版本

public class Player {
    private int id;
    private Integer councillorNumber;

    public void electCouncillor(Region region,GameBoard gameBoard){
        Councillor councillor = gameBoard.getCouncillorsSet().get(councillorNumber);
        region.getBalcony().add(councillor);
        gameBoard.setCouncillor(region.getBalcony().element());
        region.getBalcony().remove();
        gameBoard.getCouncillorsSet().remove(councillorNumber);


    }
    public Integer getCouncillorNumber() {
        return councillorNumber;
    }
    public void setCouncillorNumber(Integer councillorNumber) {
        this.councillorNumber = councillorNumber;
    }

}

我在运行相同测试时得到的错误是 expected <BLACK>, but was <PINK>

Answer 1

取自API，根据参数类型有不同的方法。第一个删除指定索引中的元素，而第二个删除元素本身，无论索引

remove(int index) Removes the element at the specified position in

remove(Object o) Removes the first occurrence of the specified element from this list, if it is present.

编辑以添加示例：

列表 = {1, 4, 5, 6, 9}

With int => remove(4) （删除索引为4的数字）结果：列表 = {1, 4, 5, 6}

With Integer => remove(4)（移除值为4的元素）结果：列表 = {1, 5, 6, 9}

Java 将 int 更改为整数时测试失败

Java Failed Test When Changing int to integer

java

int

integer

field