Cat
Dog
Compilation fails.
The code runs with no output.
An exception is thrown at runtime.
第1题:
Runnable r = new Runnable() { public void run() { System.out.print(”Cat”); } }; Threadt=new Thread(r) { public void run() { System.out.print(”Dog”); } }; t.start(); What is the result?()
第2题:
现有: class Thread2 implements Runnable { void run() { System.out.print("go "); } public static void main(String [] args) { Thread2 t2 = new Thread2(); Thread t = new Thread(t2); t.start(); } } 结果为:()
第3题:
class ThreadBoth extends Thread implements Runnable { public void run(){ System.out.print("hi "); } public static void main(String [] args){ Thread t1 = new ThreadBoth(); Thread t2 = new Thread(t1); t1.run(); t2.run(); } } 结果为:()
第4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?()
第5题:
public class Threads4 { public static void main (String[] args) { new Threads4().go(); } public void go() { Runnable r = new Runnable() { public void run() { System.out.print(”foo”); } }; Thread t = new Thread(r); t.start(); t.start(); } } What is the result?()
第6题:
Which two code fragments will execute the method doStuff() in a separate thread?()
第7题:
AAA
BBB
Compilation fails.
The code runs with no output.
第8题:
Base
BaseBase
Compilation fails.
The code runs with no output.
An exception is thrown at runtime.
第9题:
Compilation fails.
An exception is thrown at runtime.
The code executes normally and prints „foo”.
The code executes normally, but nothing is printed.
第10题:
Compilation fails.
An exception is thrown at runtime.
The code executes normally and prints “bar”.
The code executes normally, but nothing prints.
第11题:
go
运行时异常被抛出
代码运行,无输出结果
编译失败
第12题:
hi
hi hi
编译失败
代码运行,但无输出结果
第13题:
Which two code fragments will execute the method doStuff() in a separate thread?()
第14题:
public class TestOne implements Runnable { public static void main (String[] args) throws Exception { Thread t = new Thread(new TestOne()); t.start(); System.out.print(”Started”); t.join(); System.out.print(”Complete”); } public void run() { for (int i= 0; i< 4; i++) { System.out.print(i); } } } What can be a result?()
第15题:
现有: class ThreadBoth extends Threaa implements Runnable { public void run() (System.out.print("hi"); } public static voicl main (String [] args) { Thread tl=new ThreadBoth(): Thread t2 = new Thread (tl): tl.run(): t2.run(): } 结果为:()
第16题:
class Base { Base() { System.out.print(“Base”); } } public class Alpha extends Base { public static void main( String[] args ) { new Alpha(); new Base(); } } What is the result?()
第17题:
Given that a static method doIt() in a class Work represents work to be done, what block of code will succeed in starting a new thread that will do the work? CODE BLOCK a: Runnable r = new Runnable() { public void run() { Work.doIt(); } }; Thread t = new Thread(r); t.start(); CODE BLOCK b: Thread t = new Thread() { public void start() { Work.doIt(); } }; t.start(); CODE BLOCK c: Runnable r = new Runnable() { public void run() { Work.doIt(); } }; r.start(); CODE BLOCK d: Thread t = new Thread(new Work()); t.start(); CODE BLOCK e: Runnable t = new Runnable() { public void run() { Work.doIt(); } }; t.run();
第18题:
Compilation fails.
An exception is thrown at runtime.
The code executes and prints “running”.
The code executes and prints “runningrunning”.
The code executes and prints “runningrunningrunning”.
第19题:
Cat
Dog
Compilation fails.
The code runs with no output.
An exception is thrown at runtime.
第20题:
Compilation fails.
An exception is thrown at runtime.
The code executes and prints “StartedComplete”.
The code executes and prints “StartedComplete0123”.
The code executes and prints “Started0l23Complete”.
第21题:
new Thread() { public void run() { doStuff(); } }
new Thread() { public void start() { doStuff(); } }
new Thread() { public void start() { doStuff(); } } .run();
new Thread() { public void run() { doStuff(); } } .start();
new Thread(new Runnable() { public void run() { doStuff(); } } ).run();
new Thread(new Runnable() { public void run() { doStuff(); } }).start();
第22题:
new Thread() {public void run() { doStuff(); }};
new Thread() {public void start() { doStuff(); }};
new Thread() {public void start() { doStuff(); }}.run();
new Thread() {public void run() { doStuff(); }}.start();
new Thread(new Runnable() {public void run() { doStuff(); }}).start();
第23题:
in pre
pre in
in pre post
pre in post
第24题:
Code block a.
Code block B.
Code block c.
Code block d.
Code block e.