1下面程序段的输出结果是 class Test public static void main(String args[]) MyThread t=new MyThread(); t.displayOutput("t has been createD) "); t.start(); class MyThread extends Thread public void displayOutput(String s) System.out.println(s); public void run() displayOutput("t is ...
thread.start(); 1. **继承Thread类**: - 创建线程的第一种方式是继承`Thread`类,并重写`run()`方法。代码中的`MyThread`类通过`extends Thread`指明了继承关系,并在`run()`方法内定义了线程执行的任务逻辑。 2. **线程启动方式**: - 实例化`MyThread`后,调用`start()`方法(而非直接调用`run(...
但是,通过反射机制,我们可以在一个线程内修改另一个线程的class。 publicclassMyThreadextendsThread{publicvoidrun(){try{Class<?>clazz=Class.forName("OtherThread");Fieldfield=clazz.getDeclaredField("message");field.setAccessible(true);field.set(null,"Hello from MyThread");}catch(Exceptione){e.printSt...
class MyThread extends Thread { @Override public voidrun{ System.out.println("关注公众号:捡田螺的小男孩"); } } 2.2 定义Runnable接口的实现类,并重写该接口的run方法 public class ThreadTest { public static void main(String[] args) { MyRunnable myRunnable = new MyRunnable; Thread thread = new...
classMyThreadextendsThread{publicvoidrun(){System.out.println(AAA”);}publicvoidrun(Runnabler){System.out.println(BBB”);}publicstaticvoidmain(String[]args){newThread(newMyThread()).start();}}Whatistheresult?() A. AAA B. BBB C. Compilationfails. D. Thecoderunswithnooutput. 如何...
newMyThread().start(); } privatestatic class MyThread extends Thread { @Override publicvoid run() { while(true) { SystemClock.sleep(1000); } } } } 现在新创建的Thread不会持有MainActivity的一个隐式引用,当手机朝向发生改变时不会阻止垃圾回收器对旧MainActivity的回收工作~ ...
"在" + System.currentTimeMillis() + "进入printC()方法");System.out.println("线程名称为:" + Thread.currentThread().getName() + "在" + System.currentTimeMillis() + "离开printC()方法");} } 写三个线程分别调用这三个方法: publicclassMyThread25_0extendsThread ...
classMyThreadextendsThread{publicvoidrun(){System.out.println(AAA”);}publicvoidrun(Runnabler){System.out.println(BBB”);}publicstaticvoidmain(String[]args){newThread(newMyThread()).start();}}Whatistheresult?()A.AAAB.BBBC.Compilatio
public class B extends Thread{private MyObj o;public B(MyObj o){this.o=o;}public void run(){try{o.count++;o.local.set(o.count);}catch(Exception e){}}}public class MyObj{public int count=0;public ThreadLocal local=new ThreadLocal();public MyObj(){this.count=1;this.local.set(1...
根据某系统和其他系统系统核心框架构建在Spring平台之上,并在Internet网站上有网页反映Spring平台存在Class重复加载的问题http://forum.springframework.org/showthread.php?t=21383&highlight=cglib+cache&page=4 为此我们把上面的样例进行了改造,使用Spring框架来加载StaticClass,进一步验证是否存在Class重复加载的问题。