public class A extends Thread {
A() {
setDaemon(true);
}
public void run() {
(new B()).start();
try {
Thread.sleep(60000);
} catch (InterruptedException x) {}
System.out.println(“A done”);
}
class B extends Thread {
public void run() {
try {
Thread.sleep(60000);
} catch (InterruptedException x) {}
System.out.println(“B done”);
}
}
public static void main(String[] args) {
(new A()).start();
}
}
What is the result?()
现有:
class ThreadExcept implements Runnable {
public void run() { throw new RuntimeException("exception "); }
public static void main(Stri_ng [] args) {
new Thread (new ThreadExcept()).start();
try {
int x=Integer.parselnt (args [0]);
Thread. sleep (x);
System.out.print("main");
} catch (Exception e) { }
}
}
和命令行: java ThreadExcept l000
哪一个是结果?()
11.classA {
12. public void process() { System.out.print(”A “); } }
13. class B extends A {
14. public void process() throws RuntimeException {
15. super.process();
16. if (true) throw new RuntimeException();
17. System.out.print(“B”); }}
18. public static void main(String[] args) {
19. try { ((A)new B()).process(); }
20. catch (Exception e) { System.out.print(”Exception “); }
21. }
What is the result?()
11.classa {
12. public void process() { System.out.print(”a,”); } }
13. class b extends a {
14. public void process() throws IOException {
15. super.process();
16. System.out.print(”b,”);
17. throw new IOException();
18. } }
19. public static void main(String[] args) {
20. try { new b().process(); }
21. catch (IOException e) { System.out.println(”Exception”); } }
What is the result?()
Class TestException
1. public class TestException extends Exception {
2. } Class a:
1. public class a {
2.
3. public String sayHello(String name) throws TestException {
4.
5. if(name == null) {
6. throw new TestException();
7. }
8.
9. return “Hello “+ name;
10. }
11.
12. }
A programmer wants to use this code in an application:
45. A a=new A();
46. System.out.println(a.sayHello(”John”));
Which two are true?()
A customer with a well-known brand wants to make sure they have a Green decision in their next IT infrastructure investment.
How can IBM Cool Blue help this customer? ()
Given that Thing is a class, how many objects and reference variables are created by the following code?()
Thing item, stuff;
item = new Thing();
Thing entity = new Thing();
现有:
interface Data {public void load();}
abstract class Info {public abstract void load();}
下列类定义中正确使用Data和Info的是哪项?()
You plan to deploy a Virtual Desktop Infrastructure (VDI) for the public relations users.
You need to identify which additional software must be deployed on the network to support the planned VDI deployment.
Which additional software should you identify?()
import java.io.*;
public class Forest implements Serializable {
private Tree tree = new Tree();
public static void main(String [] args) {
Forest f= new Forest();
try {
FileOutputStream fs = new FileOutputStream(”Forest.ser”);
ObjectOutputStream os = new ObjectOutputStream(fs);
os.writeObject(f); os.close();
} catch (Exception ex) { ex.printStackTrace(); }
}
}
class Tree { }
What is the result?()
public class TestOne {
public static void main (String[] args) throws Exception {
Thread.sleep(3000);
System.out.println(”sleep”);
}
}
What is the result?()
public class A extends Thread {
A() {
setDaemon(true);
}
public void run() {
(new B()).start();
try {
Thread.sleep(60000);
} catch (InterruptedException x) {}
System.out.println(“A done”);
}
class B extends Thread {
public void run() {
try {
Thread.sleep(60000);
} catch (InterruptedException x) {}
System.out.println(“B done”);
}
}
public static void main(String[] args) {
(new A()).start();
}
}
What is the result?()
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?()
给出下列java源代码:
//Point x
Public class Interesting{}
在源代码//point x处添加()能符合java语法
阅读以下代码:
public class Test{
public static void main(){
System.out.println(“x=”+x); } }
请问,代码运行的结果是?()
public class Car {
private int wheelCount;
private String vin;
public Car(String vin) {
this.vin = vin;
this.wheelCount = 4;
}
public String drive() {
return “zoom-zoom”;
}
public String getInfo() {
return “VIN: “+ vin + “wheels: “+ wheelCount;
}
}
And:
public class MeGo extends Car {
public MeGo(String vin) {
this.wheelCount = 3;
}
}
What two must the programmer do to correct the compilation errors?()
1. class Pizza {
2. java.util.ArrayList toppings;
3. public final void addTopping(String topping) {
4. toppings.add(topping);
5. }
6. }
7. public class PepperoniPizza extends Pizza {
8. public void addTopping(String topping) {
9. System.out.println(”Cannot add Toppings”);
10. }
11. public static void main(String[] args) {
12. Pizza pizza = new PepperoniPizza();
13. pizza.addTopping(”Mushrooms”);
14. }
15. }
What is the result?()
public class X {
public static void main (String[]args) {
string s = new string (“Hello”);
modify(s);
System.out.printIn(s);
}
public static void modify (String s) {
s += “world!”;
}
}
What is the result?()
Youre performing tablespace point-in-time recovery on a tablespace called USERS. If an object in that tablespace has a foreign key constraint owned by another object in the INDEX_TBS
which statement is true?()
1. public class SimpleCalc {
2. public int value;
3. public void calculate() { value += 7; }
4. }
And:
1. public class MultiCalc extends SimpleCalc {
2. public void calculate() { value -= 3; }
3. public void calculate(int multiplier) {
4. calculate();
5. super.calculate();
6. value *=multiplier;
7. }
8. public static void main(String[] args) {
9. MultiCalc calculator = new MultiCalc();
10. calculator.calculate(2);
11. System.out.println(”Value is: “+ calculator.value);
12. }
13. }
What is the result?()
现有:
public interface A {}
以下哪项声明是合法的?()
现有:
public interface A {}
以下哪项声明是合法的?()
What is wrong with the following code?()
class MyException extends Exception {}
public class Qb4ab {
public void foo() { try { bar(); } finally { baz();
} catch (MyException e) {}
}
public void bar() throws MyException {
throw new MyException();
}
public void baz() throws RuntimeException {
throw new RuntimeException();
}
}
class Birds {
public static void main(String [] args) {
try {
throw new Exception();
} catch (Exception e) {
try {
throw new Exception();
} catch (Exception e2) { System.out.print("inner "); }
System.out.print("middle ");
}
System.out.print("outer ");
}
}
结果为:()
Given:
11. static class A {
12. void process() throws Exception { throw new Exception(); }
13. }
14. static class B extends A {
15. void process() { System.out.println("B "); }
16. }
17. public static void main(String[] args) {
18. A a = new B();
19. a.process();
20. }
What is the result? ()
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?()
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?()
public class Threads2 implements Runnable {
public void nun() {
System.out.println(”run.”);
throw new RuntimeException(”Problem”);
}
public static void main(String[] args) {
Thread t = new Thread(new Threads2());
t.start();
System.out.println(”End of method.”);
}
}
Which two can be results?()
11. static class A {
12. void process() throws Exception { throw new Exception(); }
13. }
14. static class B extends A {
15. void process() { System.out.println(”B”); }
16. }
17. public static void main(String[] args) {
18. new B().process();
19. }
What is the result?()
11. static classA {
12. void process() throws Exception { throw new Exception(); }
13. }
14. static class B extends A {
15. void process() { System.out.println(”B “); }
16. }
17. public static void main(String[] args) {
18.A a=new B();
19. a.process();
20.}
What is the result?()
import java.io.IOException;
public class ExceptionTest(
public static void main (Stringargs)
try (
methodA();
) catch (IOException e) (
system.out.printIn(“Caught IOException”);
) catch (Exception e) (
system.out.printIn(“Caught Exception”);
)
)
public void methodA () {
throw new IOException ();
}
What is the result?()
1. class Exc0 extends Exception { }
2. class Exc1 extends Exc0 { }
3. public class Test {
4. public static void main(String args[]) {
5. try {
6. throw new Exc1();
7. } catch (Exc0 e0) {
8. System.out.println(“Ex0 caught”);
9. } catch (Exception e) {
10. System.out.println(“exception caught”);
11. }
12. }
13. }
What is the result?()
现有:
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?()
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