Compilation fails.
Deadlock occurs.
StartMain Start1 Error EndMain End1
StartMain Start1 EndMain End1 Start2 End2
StartMain Start1 Error Start2 EndMain End2 End1
StartMain Start1 EndMain End1 Start2 Error End2
第1题:
public class X { public static void main(String [] args) { try { badMethod(); System.out.print(“A”); } catch (Exception ex) { System.out.print(“C”); } finally { System.out.print(“B”); } System.out.print(“D”); } public static void badMethod() { throw new Error(); } } What is the result?()
第2题:
public class Test { public static void aMethod() throws Exception { try { throw new Exception(); } finally { System.out.println(“finally”); } } public static void main(String args[]) { try { aMethod(); } catch (Exception e) { System.out.println(“exception”); } System.out.println(“finished”); } } What is the result?()
第3题:
下列程序的运行结果是
public class test{
private String[] data={“10”,“10.5”};
public void fun(){
double s=0;
for(int i=0;i<3;i++){
try{
s=s+Integer .parseInt(data[i]);
}catch(Exception e){
System.out.print(“errorl:”+data[i]);
}
}
}
public static void main(String[]args){
try{
testd=new test();
d .fun();
}catch(Exception e){
System.out.printIn(“error2”);
}
}
}
A.errorl:10.5
B.error2
C.errorl:10.5 error2
D.以上都不对
第4题:
现有: class Flow { public static void main(String [] args) try { System. out .print ("before") ; doRiskyThing ( ) ; System.out.print ("after ") ; } catch (Exception fe) { System.out.print ("catch") ; } System. out .println ( " done") ; } public static void doRiskyThing() throws Exception{ // this code returns unless it throws an Exception }} 可能会产生哪两项结果 ?()
第5题:
public class X { public static void main(String [] args) { try { badMethod(); System.out.print(“A”); } catch (Exception ex) { System.out.print(“B”); } finally { System.out.print(“C”); } System.out.print(“D”); } public static void badMethod() {} } What is the result?()
第6题:
static void test() { try { String x=null; System.out.print(x.toString() +“ “); } finally { System.out.print(“finally “); } } public static void main(String[] args) { try { test(); } catch (Exception ex) { System.out.print(”exception “); } } What is the result?()
第7题:
class ThreadExcept implements Runnable { public void run() { throw new RuntimeException("exception "); } public static void main(String [] args) { new Thread(new ThreadExcept()).start(); try { int x = Integer.parseInt(args[0]); Thread.sleep(x); System.out.print("main "); } catch (Exception e) { } } } 和命令行: java ThreadExcept 1000 哪一个是结果?()
第8题:
static void test() throws RuntimeException { try { System.out.print(”test “); throw new RuntimeException(); } catch (Exception ex) { System.out.print(”exception “); } } public static void main(String[] args) { try { test(); } catch (RuntimeException ex) { System.out.print(”runtime “); } System.out.print(”end “); } What is the result?()
第9题:
public class TwoThreads { private static Object resource = new Object(); private static void delay(long n) { try { Thread.sleep(n); } catch (Exception e) { System.out.print(”Error “); } } public static void main(String[] args) { System.out.print(”StartMain “); new Thread1().start(); delay(1000); Thread t2 = new Thread2(); t2.start(); delay(1000); t2.interrupt delay(1000); System.out.print(”EndMain “); } static class Thread 1 extends Thread { public void run() { synchronized (resource) { System.out.print(”Startl “); delay(6000); System.out.print(”End1 “); } } } static class Thread2 extends Thread { public void run() { synchronized (resource) { System.out.print(”Start2 “); delay(2000); System.out.print(”End2 “); } } } } Assume that sleep(n) executes in exactly m milliseconds, and all other code executes in an insignificant amount of time. What is the output if the main() method is run?()
第10题:
public class X { public static void main(String [] args) { try { badMethod(); System.out.print(“A”); } catch (RuntimeException ex) { System.out.print(“B”); } catch (Exception ex1) { System.out.print(“C”); } finally { System.out.print(“D”); } System.out.print(“E”); } public static void badMethod() { throw new RuntimeException(); } } What is the result?()