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import java.util.ArrayList; im

[单选题]

import java.util.ArrayList;
import java.util.List;
public class Main {
    public static void main(String[] args) {
        List<String> list = new ArrayList<>();
        for(int i=0;i<100;i++){
            list.add("a");
        }
    }
}

JDK1.8中，执行以上程序后，该list进行了几次扩容？

```
4
```
```
5
```
```
6
```
```
7
```

查看正确选项

fangqi_方其

 private void grow(int minCapacity) {
        // overflow-conscious code
        int oldCapacity = elementData.length;
        int newCapacity = oldCapacity + (oldCapacity >> 1);
        if (newCapacity - minCapacity < 0)
            newCapacity = minCapacity;
        if (newCapacity - MAX_ARRAY_SIZE > 0)
            newCapacity = hugeCapacity(minCapacity);
        // minCapacity is usually close to size, so this is a win:
        elementData = Arrays.copyOf(elementData, newCapacity);
    }

初始容量为10，1.5倍扩容。

发表于 2019-02-16 15:03:31 回复(1)