小编Dav*_*Ren的帖子

以下代码的目标是对300,000个int数进行排序.我发现ArrayList的sort()的持续时间小于Arrays的sort().在内部,他们使用相同的算法进行排序.ArrayList使用Arrays的sort()来对其元素数据进行排序.

public class EasySort {
    public static void main(String args[]) {
        // Read data from file, number split by ","
        FileReader fr = null;
        try {
            fr = new FileReader("testdata2.txt");
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        BufferedReader  bufferedReader=new BufferedReader(fr);
        String line=null;
        try {
            line=bufferedReader.readLine();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        // use split method to generate a String array to save numbers
        String[] strArray=line.split(",");

        //Convert string array to …