单选题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

题目
单选题
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?()
A

 Compilation fails.

B

 Deadlock occurs.

C

 StartMain Start1 Error EndMain End1

D

 StartMain Start1 EndMain End1 Start2 End2

E

 StartMain Start1 Error Start2 EndMain End2 End1

F

StartMain Start1 EndMain End1 Start2 Error End2

参考答案和解析
正确答案: E
解析: 暂无解析
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相似问题和答案

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?()  

  • A、 ABCD
  • B、 Compilation fails.
  • C、 C is printed before exiting with an error message.
  • D、 BC is printed before exiting with an error message.
  • E、 BCD is printed before exiting with an error message.

正确答案:B

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?()  

  • A、 finally
  • B、 exception finished
  • C、 finally exception finished
  • D、 Compilation fails.

正确答案:C

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


正确答案:B

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 ?()  

  • A、 before catch
  • B、 before after done
  • C、 before catch done
  • D、 before after catch

正确答案:B,C

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?()  

  • A、 AC
  • B、 BD
  • C、 ACD
  • D、 ABCD
  • E、 Compilation fails.

正确答案:C

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?() 

  • A、 null
  • B、 finally
  • C、 null finally
  • D、 Compilation fails.
  • E、 finally exception

正确答案:E

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?()  

  • A、 main
  • B、 编译失败
  • C、 代码运行,但没有输出
  • D、 main java.lang.RuntimeException:exception

正确答案:D

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?() 

  • A、 test end
  • B、 Compilation fails.
  • C、 test runtime end
  • D、 test exception end
  • E、 A Throwable is thrown by main at runtime.

正确答案:D

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?() 

  • A、 Compilation fails.
  • B、 Deadlock occurs.
  • C、 StartMain Start1 Error EndMain End1
  • D、 StartMain Start1 EndMain End1 Start2 End2
  • E、 StartMain Start1 Error Start2 EndMain End2 End1
  • F、StartMain Start1 EndMain End1 Start2 Error End2

正确答案:F

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?()  

  • A、 BD
  • B、 BCD
  • C、 BDE
  • D、 BCDE
  • E、 ABCDE
  • F、 Compilation fails.

正确答案:C

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