take a further inspection in the voyage
check and repair, then retrial
do as the surveyor’s requirement
retrial
第1题:
publicclassTwoThreads{
privatestaticObjectresource=newObject();
privatestaticvoiddelay(longn){
try{Thread.sleep(n);}
catch(Exceptione){System.out.print(”Error);}
}
publicstaticvoidmain(String[]args){
System.out.print(”StartMain);
newThread1().start();
delay(1000);
Threadt2=newThread2();
t2.start();
delay(1000);
t2.interrupt
delay(1000);
System.out.print(”EndMain);
}
staticclassThread1extendsThread{
publicvoidrun(){
synchronized(resource){
System.out.print(”Startl);
delay(6000);
System.out.print(”End1);
}
}
}
staticclassThread2extendsThread{
publicvoidrun(){
synchronized(resource){
System.out.print(”Start2);
delay(2000);
System.out.print(”End2);
}
}
}
}
Assumethatsleep(n)executesinexactlymmilliseconds,andallothercodeexecutesinaninsignificantamountoftime.Whatistheoutputifthemain()methodisrun?()
第2题:
publicclassThreads4{publicstaticvoidmain(String[]args){newThreads4().go();}publicvoidgo(){Runnabler=newRunnable(){publicvoidrun(){System.out.print(”foo”);}};Threadt=newThread(r);t.start();t.start();}}Whatistheresult?()
A.Compilationfails.
B.Anexceptionisthrownatruntime.
C.Thecodeexecutesnormallyandprints?foo”.
D.Thecodeexecutesnormally,butnothingisprinted.
第3题:
( 24 )请阅读下面程序
public class ThreadTest {
public static void main ( String args[ ]){
Thread t1 = new Thread ( new Hello ()):
Thread t2 = new Thread ( new Hello ()):
t l .start ():
t2.start ();
}
}
class Hello implements Runnable {
int i ;
public void run (){
while ( true ) {
System.out.println ( "Hello"+i++ ) ;
if ( i=5 ) break :
}
}
}
该程序创建线程使用的方法是()
A )继承 Thread 类
B )实现 Runnable 接口
C ) t l.start ()
D ) t2.start ()
第4题:
第5题:
When carrying out a parallel track search pattern,the course of the search units should normally be which of the following ________.
A.In the same direction as the anticipated drift
B.In the opposite direction of the anticipated drift
C.Perpendicular to the line of anticipated drift
D.Downwind
第6题:
A.Cat
B.Dog
C.Compilationfails.
D.Thecoderunswithnooutput.
E.Anexceptionisthrownatruntime.
第7题:
____does not belong to the mooring trial item.
A.Generator sets running test
B.Shafting intensity test
C.The function test for pumps that serving for M.E
D.M.E safety devices test
第8题:
It is fixed ________ at seven tomorrow morning.
A、if we’ll start out
B、that we’ll start out
C、when we’ll start out
D、are we going to start out
第9题:
第10题: