java.lang.OutOfMemoryError：Java堆空间

问题描述

我在玩一些来自Oracle网站的Collections的例子

I was playing with some examples of Collections from Oracle website

public class Timing {

    public static void method(){

        List numbers = new ArrayList();

        for (double i = 1; i <= Double.MAX_VALUE; i++)
        numbers.add(new Double(i));

        Collections.shuffle(numbers);
        List winningcombination = numbers.subList(0, 10);
        Collections.sort(winningcombination);
    }

    public static void main(String[] args)
    {
        long start = System.currentTimeMillis();
        method();
        long end = System.currentTimeMillis();
        System.out.println("time elapsed : " + (end-start));
    }
}

我尝试看看需要多长时间它为Double.MAX_VALUE。我有这个：

I tried to see how long it will take to do it for Double.MAX_VALUE. And I got this :

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
    at java.util.Arrays.copyOf(Unknown Source)
    at java.util.Arrays.copyOf(Unknown Source)
    at java.util.ArrayList.ensureCapacity(Unknown Source)
    at java.util.ArrayList.add(Unknown Source)

我有办法解决这个问题吗？

I there a way to fix this ?

推荐答案

Collection ？不，地球上没有那么多的RAM。 Double.MAX_VALUE 约为2倍的10到308次幂：那是2，后面是300多个零。给予百思买一个电话，看看他们会收取多少钱在你的电脑。

Is there a way to allow you to create and store Double.MAX_VALUE objects in a Collection? No. There's not that much RAM on Earth. Double.MAX_VALUE is about 2 times ten to the 308th power: that's 2 followed by over 300 zeros. Give Best Buy a call, see how much they'd charge to put that in your computer.

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