小编use*_*571的帖子

我需要按字符串的长度对LinkedList的字符串进行排序,但是希望保持相同长度字符串的顺序(不按字典顺序排序).

样本输入:

this
is
just
a
test

样本输出:

a
is
this
just
test

我试图用一个Comparable<LinkedList<String>>和一个compareTo方法做这个,但我没有得到正确的输出(我仍然按字典顺序排序)

public class Q3_sorting implements Comparable<LinkedList<String>> {
    Scanner keyboardScanner = null;
    LinkedList<String> fileList = new LinkedList<String>();

// [...]这里有一些代码

public int compareTo(LinkedList<String> o) {
        // TODO Auto-generated method stub
        o = fileList;

        for (int i = 0; i < fileList.size() -1; i++) {
            if (fileList.get(i).length() == o.get(i+1).length()) {
                return 0;
            }
            if (fileList.get(i).length() > o.get(i+1).length()) {
                return -1;
            }
            if (fileList.get(i).length() < o.get(i+1).length()) { …