为了更加高效地调试LeetCode中关于ListNode的题目，编写了快速初始化ListNode的通用静态方法，重写ListNode的toString方法。
不多说了，直接上代码
ListNode 类
重写了toString方法，方便调试时能够直接输出
public class ListNode {
public int val;
public ListNode next;
public ListNode(int x) {
val = x;
}
@Override
public String toString() {
String s = "";
ListNode current = this;
while ( current != null ) {
s = s + " " + current.val;
current = current.next;
}
return s;
}
}
ListNodeUtil 类
编写ListNode初始化方法
public class ListNodeUtil {
public static ListNode initList (int...vals){
ListNode head = new ListNode(0);
ListNode current = head;
for(int val : vals){
current.next = new ListNode(val);
current = current.next;
}
return head.next;
}
@Test
public void test() {
ListNode l = initList(1,2,3);
System.out.println(l);
}
}
编写上述代码的思路来源于fatezy's github
