public class Threads5 { public static void main (String[] args) { new Thread(new Runnable() { public void run() { System.out.print(”bar”); } }).start(); } } What is the result?()
第1题:
class TestA { public void start() { System.out.println(”TestA”); } } public class TestB extends TestA { public void start() { System.out.println(”TestB”); } public static void main(String[] args) { ((TestA)new TestB()).start(); } } What is the result?()
第2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3题:
2. public class Foo implements Runnable ( 3. public void run (Thread t) { 4. system.out.printIn(“Running.”); 5. } 6. public static void main (String[] args) { 7. new thread (new Foo()).start(); 8. ) 9. ) What is the result?()
第4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() { throw new RuntimeException(); } } What is the result? ()
第5题:
public class TestOne { public static void main (String[] args) throws Exception { Thread.sleep(3000); System.out.println(”sleep”); } } What is the result?()
第6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7题:
AAA
BBB
Compilation fails.
The code runs with no output.
第8题:
Cat
Dog
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 and prints “StartedComplete”.
The code executes and prints “StartedComplete0123”.
The code executes and prints “Started0l23Complete”.
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:
An exception is thrown.
The program exists without printing anything.
An error at line 1 causes compilation to fail.
An error at line 6 causes the compilation to fail.
“Running” is printed and the program exits.
第12题:
in pre
pre in
in pre post
pre in post
第13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:
class Work implements Runnable { Thread other; Work(Thread other) { this.other = other; } public void run() { try { other.join(); } catch (Exception e) { } System.out.print("after join "); } } class Launch { public static void main(String [] args) { new Thread(new Work(Thread.currentThread())).start(); System.out.print("after start "); } } 结果为:()
第16题:
public class Starter extends Thread { private int x= 2; public static void main(String[] args) throws Exception { new Starter().makeItSo(); } public Starter() { x=5; start(); } public void makeItSo() throws Exception { join(); x=x- 1; System.out.println(x); } public void run() { x *= 2; } } What is the output if the main() method is rum?()
第17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:
Compilation fails.
An exception is thrown at runtime.
The code executes normally and prints “sleep”.
The code executes normally, but nothing is printed.
第20题:
Base
BaseBase
Compilation fails.
The code runs with no output.
An exception is thrown at runtime.
第21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22题:
TestA
TestB
Compilation fails.
An exception is thrown at runtime.
第23题:
An exception is thrown.
The program exists without printing anything.
An error at line 1 causes compilation to fail.
An error at line 6 causes the compilation to fail.
“Running” is printed and the program exits.