相关考题
-
单项选择题
下列哪项是Java语言中所定义的字节流?()
A.Output
B.Reader
C.Writer
D.InputStream -
多项选择题
class Order implements Runnable { public void run () { try { Thread.sleep (2000) ; } catch (Exception e) System.out.print("in") ; public static void main (String [] args) { Thread t = new Thread (new Order ()) ; t.start () ; System.out.print ("pre ") ; try { t.join () ; } catch (Exception e) { } System.out.print ("post") ; 可产生哪两项结果?()
A. pre in post
B. pre in
C. in post pre
D. in pre post
E. pre post in -
多项选择题
现有: class Waiting implements Runnable { boolean flag=false; public synchronized void run() { if (flag) { flag=false; System.out.print ("1"); try { this.wait(); ) catch (Exception e) { } System.out.print ("2"); } else { flag=true; System.out.print ("3"); try{Thread.sleep (2000); } catch(Exception e) {} System.out.print ("4"); notify(); } } public static void main (String [] args) { Waiting w=new Waiting(); new Thread (w) .start(); new Thread (w) .start(); } } 以下哪两项是正确的?()
A.代码输出l 3 4
B.代码输出3 4 1
C.代码输出l 2 3 4
D.代码输出1 3 4 2
E.代码运行完毕
F.代码不会完成
