關於list多線程安全問題

package test.main;


import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Vector;




public class 關於list多線程安全問題 {


public static void main(String[] args) {
final Vector<Object> v =new Vector<Object>();
for(int i=0;i<10000;i++){
v.add(new Object());
}
System.out.println("複製前             "+v.size());
Vector<Object> vv = new Vector<Object>(Arrays.asList(new Object[v.size()]));
new Thread(){
public void run() {
try {
this.sleep(5);
} catch (InterruptedException e) {
e.printStackTrace();
}
int run =0;
while (run<10000) {
v.add(new Object());
// try {
// this.sleep(1);
// } catch (InterruptedException e) {
// e.printStackTrace();
// }
run ++;
}
};
}.start();
Collections.copy(vv, v);
System.out.println("複製完成 後vv       "+vv.size());
System.out.println("複製完成後 v    "+v.size());
System.out.println(v.containsAll(vv));
v.removeAll(vv);
System.out.println("刪除掉後v                  " +v.size());
System.out.println(v.containsAll(vv));
}
}