Question

这可能是一个非常简单的问题，但我似乎无法在Google上找到合适的答案。我有一个名为Player的类，它有一个名为playerInv的String数组，大小为10.

在我的主活动类中，我想运行一个for循环来确定数组中第一个为空的索引（＆＃34;＆＃34;）。然后我想用新字符串填充它，然后终止循环。我该怎么做呢？

对于这个不起眼的问题感到抱歉。就像我说的那样，我试过谷歌无济于事！

For Loop：

    String playerInvTemp[] = thePlayer.getPlayerInv; ERROR -- cannot resolve getPlayerInv
                for (int i=0; i < playerInvTemp.length; i++)
                {
                    if ((!playerInvTemp[i].isEmpty()) || playerInvTemp[i] == null)
                    {
                        setPlayerInv("Blood Essence", i); ERROR cannot resolve setPlayerInv
                        //invText.setText();
                        Blood = true;
                        break;
                    }
                }

玩家等级：

public class Player {

private int playerPos;
private int playerHP;
private String playerInv[];

Player(int startPos, int startHP, String[] newInventory)
{
    playerPos = startPos;
    playerHP = startHP;
    playerInv = newInventory;
}
public int getPlayerPos() {
    return playerPos;
}

public void setPlayerPos(int playerPos) {
    this.playerPos = playerPos;
}

public int getPlayerHP(){
    return playerHP;
}

public void setPlayerHP(int playerHP){
    this.playerHP = playerHP;
}

public String getPlayerInv(int pos)
{
    return playerInv[pos];
}

public void setPlayerInv(String playerInv[]) {
    for (int i=0; i<10; i++)
    {
        this.playerInv[i] = playerInv[i];
    }
}

public void setPlayerInv(String val, int index)
{
    this.playerInv[index] = val;
}

public String getPlayerInv()
{
    return this.playerInv;  *//this gives error "Incompatible types. Required java.lang.string, found java.lang.string[]"*
}

}

Answer 1

这样做

在Player class

中添加这两个方法

public void setPlayerInv(String val, int index) 
{
    this.playerInv[index] = val;
}

public String[] getPlayerInv()
{
    return this.playerInv;
}

然后像这样改变你的for循环

String playerInvTemp[] = thePlayer.getPlayerInv();
for (int i=0; i < playerInvTemp.length; i++)
{
    if (!playerInvTemp[i].isEmpty()) || playerInvTemp[i] == null)
    {
        setPlayerInv("Blood Essence", i);
        //invText.setText();
        Blood = true;
        break;
    }
}

Answer 2

这里有一堆问题，.length()对数组无效，应该是.length。

 `for (int i=0; i<thePlayer.getPlayerInv(i).length(); i++)`

你很可能意味着null或至少需要检查它，在这里你需要[]而不是()：

if (thePlayer.getPlayerInv[i] == "" or theplayer.getPlayerInv[i] == null)

这是完全错误的，事实上你需要发布你的代码和错误，你有很多问题，应该从学习一些关于Java的基础知识开始。

尝试一些初学者教程（https://www.google.com/search?q=java+tutorials&ie=utf-8&oe=utf-8）。您有很多的语法和逻辑错误。

Answer 3

您是否运行构造函数player（）??

的实例

我做了

Player a=new Player();
a.getPlayerInv(0)

并且工作正常。

如何从不同的类更改String数组的值？

3 个答案: