Java中怎么利用多线性同步读写数据,相信很多没有经验的人对此束手无策,为此本文总结了问题出现的原因和解决方法,通过这篇文章希望你能解决这个问题。
public class SynTest ...{
private String firstName, lastName;
private synchronized String getName() ...{
String result = firstName + " " + lastName;
return result;
}
private synchronized void setName(String firstName,
String lastName) ...{print("entering setName");
this.firstName = firstName;
print("Set first name have done firstName=" +
this.firstName);try ...{
Thread.sleep(1000);
} catch (InterruptedException e) ...{
}
this.lastName = lastName;
print("set last name have done,and leave setName()
method.firstName="+ this.firstName + " lastName=" + this.lastName);
}
private static void print(String msg) ...{
String thread = Thread.currentThread().getName();
System.out.println(thread + ": " + msg);
}
public static void main(String[] args) ...{
// 必需声明为final,否则runnable里面的run()方法不能访问。
final SynTest test1 = new SynTest();
// 设置初始值
test1.setName("arzu", "guli");
Runnable run1 = new Runnable() ...{
public void run() ...{
test1.setName("kang", "midi");
}
};
// 修改名字线程
Thread threadOne = new Thread(run1, "threadOne");
threadOne.start();
try ...{
Thread.sleep(200);
} catch (InterruptedException e) ...{
}
Runnable run2 = new Runnable() ...{
public void run() ...{
print("读取" + test1.getName());
}
};
// 读取名字线程
Thread threadTwo = new Thread(run2, "threadTwo");
threadTwo.start();
System.out.println("main() exit");
}
}
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