_147.java

package com.fishercoder.solutions;

import com.fishercoder.common.classes.ListNode;

import java.util.ArrayList;
import java.util.List;

/**
 * Sort a linked list using insertion sort.
 */
public class _147 {

    public ListNode insertionSortList(ListNode head) {
        ListNode temp = head;
        List<Integer> list = new ArrayList<Integer>();
        while(temp != null){
            list.add(temp.val);
            temp = temp.next;
        }
        Integer[] nums = list.toArray(new Integer[list.size()]);
        for(int i = 1; i < list.size(); i++){
            for(int j = i-1; j >= 0; j--){
                if(nums[j] > nums[j+1]){
                    int tempNum = nums[j];
                    nums[j] = nums[j+1];
                    nums[j+1] = tempNum;
                }
            }
        }
        ListNode newHead = head;
        for(int i = 0; i < nums.length; i++){
            newHead.val = nums[i];
            newHead = newHead.next;
        }
        return head;
    }

}