当前分类: SCJP程序员认证考试
问题:单选题public class test ( public static void main(string args) { int 1= 0; while (i) { if (i==4) { break; } ++i; } } ) What is the value of i at line 10?()A 0B 3C 4D 5E The code will not compile....
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问题:Which will declare a method that is available to all members...
问题:10. class MakeFile { 11. public static void main(String[] a...
问题:int x = 1, y =6; while (y--) { x++; } System.out.println...
问题:单选题Given classes defined in two different files: 1. package util; 2. public class BitUtils { 3. private static void process(byte[] b) { } 4. } 1. package app; 2. public class SomeApp { 3. public static void main(String[] args) { 4. byte[] bytes = ...
问题:单选题Which code should be inserted at line 1 of Demo.java to compile and run Demo toprint "pizzapizza"?()A import utils.*;B static import utils.*;C import utils.Repetition.*;D static import utils.Repetition.*;E import utils.Repetition.twice();F import...
问题:5. String foo = “base”; 6. foo.substring(0,3); 7. foo.co...
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:33. try { 34. // some code here 35. } catch (NullPointerEx...
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...
问题:多选题package com.company.application; public class MainClass { public static void main(String[] args) { } } And MainClass exists in the /apps/com/company/application directory. Assume the CLASSPATH environment variable is set to “.“ (current directory)....
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: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 ...
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:Which two valid declarations of a char? ()...
问题:public class TestFive { private int x; public void foo() {...
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:10. interface A { void x(); } 11. class B implements A { pu...