import java.util.*;为什么无法把该包下的类都导入呢
import java.util.*;
/*import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
*/
class Resource
{
private String name;
private int count=1;
private boolean flag=false;
private Lock lock=new ReentrantLock();//创建锁
private Condition con_1=lock.newCondition();
private Condition con_2=lock.newCondition();
}
假如我导入java.util.*; Lock,Condition报异常,导入注释掉的正常