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What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?（26个答案）
昨天关门了。
我正在创建一个杂乱的文字游戏。起初我只有3个级别，但当我尝试添加其他级别时，我收到了这个错误"java. lang. ArrayIndexOutOfBoundsException：长度= 0;索引= 0 "
这部分是错误所在

@Override
protected void onResume() {
    super.onResume();
    final String [] str=quesWord.toArray(new String[quesWord.size()]);
    attemptsLeft.setText("Attempts left: "+chances);
    points.setText("Score: "+score);
    jumbleWord.setText(wordJumble(str[0]));
    b.setOnClickListener(new OnClickListener() {
        int j=0;
        int len=str.length;

public static String wordJumble(String word )
{
    Random random = new Random();
    char wordArray[] = word.toCharArray();
    for(int i=0 ; i< wordArray.length-1 ; i++ )
    {
        int j = random.nextInt(wordArray.length-1);
        char temp = wordArray[i];
        wordArray[i] = wordArray[j];
        wordArray[j] = temp;
    }
    if(wordArray.toString().equals(word)){
        wordJumble(word);
    }
    return new String(wordArray);
}

public void fetchWords(){
    try{
        c=db.rawQuery("select * from wordscramble where level='"+lv+"'",null);
        while(c.moveToNext()){
            s=c.getString(0);
            quesWord.add(s);
        }
        Collections.shuffle(quesWord);
    }
    catch(Exception e){

    }
}