ii）自制乐观锁：
例 2.2.1.2
package com;
public class Ticket_Opti_MarkToWin {
private int number=4;
private int numberVersion=0;
private synchronized int updAtom(int num,int verNum)
{
int flag;
if(numberVersion==verNum&&number>num){
return flag;
}
void buyOne()
{
/*前面的三句，都只是get，想改只有updAtom里面，
你的buyOne只有改对和不改的权利，没有改错的权利*/
int myVersion=numberVersion;
if(flag==1){
System.out.println("买一张成功");
}else{
System.out.println("已经进队等了一会，买一张失败");
}
}
void buyBatch(int num)
{
int myVersion=numberVersion;
int myNumber=number;
}
}
package com;
class MulThreMarkToWin extends Thread {
Ticket_Opti_MarkToWin ticOpti_MarkToWin;
}
class MulThreMarkToWinBatch extends Thread {
Ticket_Opti_MarkToWin ticOpti_MarkToWin;
}
public class TestConcurBuy_MarkToWin {
public static void main(String[] args) {
Ticket_Opti_MarkToWin ticOpti_MarkToWin=new Ticket_Opti_MarkToWin();
Thread t1 = new MulThreMarkToWin(ticOpti_MarkToWin);
Thread t2 = new MulThreMarkToWinBatch(ticOpti_MarkToWin);
Thread t3 = new MulThreMarkToWin(ticOpti_MarkToWin);
Thread t4 = new MulThreMarkToWin(ticOpti_MarkToWin);
t1.start();
t2.start();
t3.start();
t4.start();
}
}
更多请看：https://blog.csdn.net/qq_44638460/article/details/104137404
