第1题:
public class Base { public static final String FOO = “foo”; public static void main(String[] args) { Base b = new Base(); Sub s = new Sub(); System.out.print(Base.FOO); System.out.print(Sub.FOO); System.out.print(b.FOO); System.out.print(s.FOO); System.out.print(((Base)s).FOO); } } class Sub extends Base {public static final String FOO=bar;} What is the result?()
第2题:
3. string foo = “ABCDE”; 4. foo.substring(3); 5. foo.concat(“XYZ”); 6. Type the value of foo at line 6.()
第3题:
GiventheJSPcode:<%request.setAttribute("foo","bar");%>andtheClassictaghandlercode:5.publicintdoStartTag()throwsJspException{6.//insertcodehere7.//returnint8.}Assumetherearenoother"foo"attributesinthewebapplication.WhichinvocationonthepageContextobject,insertedatline6,assigns"bar"tothevariablex?()
A.Stringx=(String)pageContext.getAttribute("foo")
B.Stringx=(String)pageContext.getRequestScope("foo")
C.ItisNOTpossibletoaccessthepageContextobjectfromwithindoStartTag
D.Stringx=(String)pageContext.getRequest().getAttribute("foo")
E.Stringx=(String)pageContext.getAttribute("foo",PageContext.ANY_SCOPE)
第4题:
现有: 1. abstract class Color { 2.protected abstract String getRGB(); 3. } 4. 5. public class Blue extends Color { 6. //insert code here 7. } 和四个声明: public String getRGB() { return "blue"; } String getRGB() { return "blue"; ) private String getRGB() { return "blue"; } protected String getRGB() { return "blue"; ) 分别插入到第6行,有几个可以通过编译?()
第5题:
1. class SuperFoo { 2. SuperFoo doStuff(int x) { 3. return new SuperFoo(); 4. } 5. } 6. 7. class Foo extends SuperFoo { 8. //insert code here 9. } 下面哪三项分别插入到第8行,可以编译?()
第6题:
int index = 1; String test = new String; String foo = test[index]; What is the result?()
第7题:
5. String foo = “base”; 6. foo.substring(0,3); 7. foo.concat(“ket”) 8. Type the value of foo at line 8.()
第8题:
publicclassBase{publicstaticfinalStringFOO=foo”;publicstaticvoidmain(String[]args){Baseb=newBase();Subs=newSub();System.out.print(Base.FOO);System.out.print(Sub.FOO);System.out.print(b.FOO);System.out.print(s.FOO);System.out.print(((Base)s).FOO);}}classSubextendsBase{publicstaticfinalStringFOO=bar;}Whatistheresult?()
A.foofoofoofoofoo
B.foobarfoobarbar
C.foobarfoofoofoo
D.foobarfoobarfoo
E.barbarbarbarbar
F.foofoofoobarbar
G.foofoofoobarfoo
第9题:
public class Test { public static void main(String args[]) { class Foo { public int i = 3; } Object o = (Object)new Foo(); Foo foo = (Foo)o; System.out.println(“i = “ + foo.i); } } What is the result?()
第10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?()