当前分类: SCJP程序员认证考试
问题:多选题Which two CANNOT directly cause a thread to stop executing?()ACalling the yield method.BCalling the wait method on an object.CCalling the notify method on an object.DCalling the notifyAll method on an object.ECalling the start method on another Thread ...
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问题:单选题What will be the result of attempting to compile and run the following program?() public class Q28fd { public static void main(String args[]) { int counter = 0; l1: for (int i=10; i i) break l2; if (i == j) { counter++; continue l1; }...
问题:Which two demonstrate encapsulation of data?() ...
问题:多选题AnInterface is an interface. AnAdapter0 is a non-abstract, non-final class with a zero argument constructor. AnAdapter1 is a non-abstract, non-final class without a zero argument constructor, but with a constructor that takes one int argument. W...
问题:Given: foo and bar are public references available to many ...
问题:try { if ((new Object))(.equals((new Object()))) { System....
问题:填空题What is the name of the method that threads can use to pause their execution until signalled to continue by another thread? () Fill in the name of the method (do not include a parameter list)....
问题:单选题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?()A Compilation fails.B An exception is thrown at runtime.C The c...
问题:多选题1. public class OuterClass { 2. private double d1 = 1.0; 3. // insert code here 4. } Which two are valid if inserted at line 3?()Astatic class InnerOne { public double methoda() { return d1; } }Bstatic class InnerOne { static double methoda() { ret...
问题:public class MyLogger { private StringBuilder logger = new ...
问题:多选题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(”...
问题:10. interface A { void x(); } 11. class B implements A { pu...
问题:Which two valid declarations of a char? ()...
问题:多选题Which two valid declarations of a char?()AChar ch = “a”;BChar ch = ‘/’ ‘;CChar ch = ‘cafe’;DChar ch = “cafe”;EChar ch = ‘/ucafe’;FChar ch = ‘/u10100’;GChar ch = (char) true;...
问题:单选题Which of the following range of short is correct?()A -27 -- 27-1B 0 -- 216-1C -215 -- 215-1D -231 -- 231-1...
问题:多选题public class SyncTest{ public static void main(String args) { final StringBuffer s1= new StringBuffer(); final StringBuffer s2= new StringBuffer(); new Thread () { public void run() { synchronized(s1) { s2.append(“A”); synchronized(...
问题:5. String foo = “base”; 6. foo.substring(0,3); 7. foo.co...
问题:多选题Which two of statements are true?()AIt is possible to synchronize static methods.BWhen a thread has yielded as a result of yield(), it releases its locks.CWhen a thread is sleeping as a result of sleep(), it releases its locks.DThe Object.wait() method...
问题:多选题14. DateFormat df; 15. Date date = new Date(); 16. //insert code here 17. String s = df.format( date); Which two,inserted independently at line 16, allow the code to compile?()Adf= new DateFormat();Bdf= Date.getFormatter();Cdf= date.getFormatter();...
问题:单选题public class Test { private static int[] x; public static void main(String[] args) { System.out.println(x[0]); } } What is the result?()A 0B nullC Compilation fails.D A NullPointerException is thrown at runtime.E An ArrayIndexOutOfBoundsExc...