[英]java hashmap overwriting values
I'm trying to use a hashmap to store an int array of 4 integers. 我正在尝试使用hashmap来存储4个整数的int数组。 when I add to the hashmap it is supposed to add the most recent set of 4 integers and then generate a new set of 4 numbers.
当我添加到hashmap时,它应该添加最新的4个整数集,然后生成一组新的4个数字。 But instead it overwrites all values with the newly generated set of 4 integers... This seems weird since I never tell it to do so.
但是它用新生成的4个整数集覆盖所有值......这看起来很奇怪,因为我从来没有告诉它这样做。 Any ideas?
有任何想法吗? Here is the code where it gets added
这是添加它的代码
System.out.println("Games Played: " + gamesPlayed);
System.out.println("Size Before: " + scoreAnswer.size());
scoreAnswer.put(gamesPlayed, answer); //gamesPlayed will increase by 1 every time right after
System.out.println("Size After: " + scoreAnswer.size());
for (int i = 0; i < maxPin; i++) {
System.out.println(answer[i]);
}
System.out.println("hash");
for (int i = 0; i < scoreAnswer.size(); i++) {
int[] a = scoreAnswer.get(i);
for (int j = 0; j < a.length; j++) {
System.out.println("[" + i + "]" + a[j]);
}
}
gamesPlayed++;
System.out.println("Games Played: " + gamesPlayed);
when I run the program and have it add to the hashmap this is what will print out: 当我运行程序并将其添加到hashmap时,这将打印出来:
Games Played: 0, Size Before: 0, Size After: 1, 4 0 0 4, hash [0]4 [0]0 [0]0 [0]4 Games Played: 1
Everything is working here, untill i have it add another to the hash, it will then return this: 一切都在这里工作,直到我让它添加另一个哈希,它将返回此:
Games Played: 1, Size Before: 1, Size After: 2, 4 2 0 4, hash [0]4 [0]2 [0]0 [0]4 [1]4 [1]2 [1]0 [1]4, Games Played: 2
As you can see, the first set of integers have been overwritten to the 2nd set of integers. 如您所见,第一组整数已被覆盖为第二组整数。 I have no idea why this is happening.
我不知道为什么会这样。 Any help is appreciated!
任何帮助表示赞赏!
EDIT: So sorry, my computer posted the question before I was finished typing all of my code. 编辑:很抱歉,在我输入完所有代码之前,我的电脑发布了这个问题。
根据你的代码,变量“answer”必须是你想要放入hashmap的数组,我猜你每次使用new
关键字时都需要初始化它,就像这样
int[] answer = new int[4];
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