JAVA线程安全类

package Multithreading;

import java.util.*;

public class BuyTicketDemo {
    public static void main(String[] args) {
        StringBuffer sb = new StringBuffer();
        StringBuilder sb2= new StringBuilder();

        Vector v= new Vector();
        ArrayList arrayList = new ArrayList();

        Hashtable hs= new Hashtable();
        HashMap hs2 = new HashMap();
        
        List list = Collections.synchronizedList(new ArrayList());

    }
}