Linux配置双网卡路由

package com.tw.dst.link;

/**
* <p>链表类</p>
* @author tangw
*
*/
public class Link {
public int iData;
public double dData;
public Link next;

public Link(int idata,double ddata){
this.iData = idata;
this.dData = ddata;
}

public void displayLink(){
System.out.println(" idata="+iData+"  ddata:"+dData);
}

}

package com.tw.dst.link;

/**
* <p>单链表</p>
* @author tangw 2010-11-29
*
*/
public class LinkList {

private Link first;//第一个链结点的引用

public LinkList() {
first = null;//引用类型初始化会自动赋值为null，此处不是必须的
}
//判断是否为空
public boolean isEmpty(){
return (first == null);
}
//插入数据
public void insertFirst(int id,double dd){
Link link = new Link(id,dd);
link.next = first;
first = link;
}

//删除数据
public Link deleteFirst(){
Link temp = first;
first = first.next;
return temp;
}
//查找指定节点
public Link find(int key){
Link current = first;
while( current.iData!=key ){
if( current.next == null){
return null;
}else{
current = current.next;//将当前对象的下一个引用置为当前
}
}
return current;
}

//删除指定节点
public Link delete(int key){
Link current = first;	//存储当前对象
Link previous = first;	//存储先前对象
while(current.iData !=key ){
if(current.next ==null){
return null;
}else{
previous = current;
current = current.next;
}
}
if( current == first){
first = first.next;
}else{
previous.next = current.next;
}
return current;
}

//输出链表数据
public void displayList(){
System.out.println("list (first-->last)");
Link current = first;
while(current!=null){
current.displayLink();
current =current.next;
}
System.out.println("");
}

/**
* @param args
*/
public static void main(String[] args) {
//----1---插入
LinkList linkList = new LinkList();
linkList.insertFirst(22, 2.99);
linkList.insertFirst(44, 4.99);
linkList.insertFirst(66, 6.99);

linkList.displayList();
//---2--删除
/*while(!linkList.isEmpty()){
Link aLink = linkList.deleteFirst();
System.out.println("--deleted");
aLink.displayLink();
}

linkList.displayList();*/

//==3 查找=====
Link link = linkList.find(44);
if(null !=link){
System.out.println("---idata:"+link.dData);
}else{
System.out.println("-find---no ");
}

//---4: 删除指定元素
Link delLink = linkList.delete(44);
if( null != delLink){
System.out.println("----del link:"+delLink.dData);
}else{
System.out.println("-delete---no ");
}
linkList.displayList();
}

}