这个怎么就添加了最后一个呢？没添加进去(完成) - 黑马程序员技术交流社区

import java.util.*;
public class java3{
public static void main(String[]args){
LinkedList2 li=new LinkedList2 ();
Tianjia(li);
System.out.println("添加的节点为：姓名学号年龄");
System.out.print(li);
System.out.println("取出节点的序号:");
Integer k=new Integer(new Scanner(System.in).next());
DATA w;
while(true){
try{
w=Quchhu(li,k);
}catch(Exception e){System.out.println("不存在 please put in new");
k=Integer.valueOf(new Scanner(System.in).next());
continue;}
break;
}
System.out.println("移除成功.."+w);
System.out.println("查找的key请输入..");
String s =new Scanner (System.in).nextLine().trim();
w=chazhao(li,s);
if(w!=null)System.out.println("查找成功\n"+w);
}
static void Tianjia(LinkedList2 a){
String key="",name="";Integer age=0;
String[]s;
try{
System.out.println("输入添加的节点:{ 姓名学号年龄 }：");
s=(new Scanner(System.in).nextLine()).split(" ");
name=s[0].trim();
key=s[1].trim();
age=Integer.valueOf(s[2].trim());
while(age!=0){
a.add(new DATA(name,key,age));
System.out.println("添加成功..");
System.out.println("输入添加的节点:{ 姓名学号年龄 }：");
s=(new Scanner(System.in).nextLine()).split(" ");
name=s[0].trim();
key=s[1].trim();
age=Integer.valueOf(s[2].trim());
}
}catch(Exception e){
System.out.println("添加不成功..");
Tianjia(a);}
System.out.println(a);
}
static DATA Quchhu(LinkedList2 a,int i)throws Exception {
DATA b=(DATA)a.get(i);
a.remove(i);
return b;
}
static void chazhao(LinkedList2 a,int i){
System.out.println(a.get(i));
}
static DATA chazhao(LinkedList2 a,String s){
ListIterator<Object> it=a.listIterator();
while(it.hasNext()){
Object o=it.next();
if(((DATA)o).equals(s.trim())){
return (DATA)o;
}
}
return null;
}
}
class LinkedList2 extends LinkedList<Object>{
public String toString(){
String s="";
int j=0;
ListIterator<Object> i=this.listIterator();
while(i.hasNext()){
s+=(j++)+":"+String.valueOf(i.next())+"\n";
}
return s;
}
}
class DATA{
static String key;
static String name;
Integer age;
public DATA(){}
public DATA(String name,String key,Integer age){
this.key=key;
this.name=name;
this.age=age;
}
public String getkey(){
return key;
}
public String toString(){
return name+" "+key+" "+age;
}
}

复制代码

<b>static DATA chazhao(LinkedList2 a,String s){
ListIterator<Object> it=a.listIterator();
while(it.hasNext()){
DATA o=(DATA)(it.next());
if(o.getkey().equals(s.trim())){
return (DATA)o;
}
}
return null;
}</b>

复制代码

<b>String s =new Scanner (System.in).nextLine().trim();
w=chazhao(li,s);
if(w!=null)System.out.println("查找成功\n"+w);</b>

复制代码