publicclassSyncTest{publicstaticvoidmain（Stringargs）{finalStringBuffers1=newStringBuffer（）；finalStringBuffers2=newStringBuffer（）；newThread（）{publicvoidrun（）{synchronized（s1）{s2.append（A”）；synchronized（s2）{s2.append（B”）；System.out.print（s1）；System.out.print（s2）；}}}}.start（）；newThread（）{publicvoidrun（）{synchronized（s2）{s2.append（C”）；synchronized（s1）{s1.append（D”）；System.out.print（s2）；System.out.print（s1）；}}}}.start（）；}}Whichtwostatementsaretrue？（）
publicclassSyncTest{
publicstaticvoidmain（Stringargs）{
finalStringBuffers1=newStringBuffer（）；
finalStringBuffers2=newStringBuffer（）；
newThread（）{
publicvoidrun（）{
synchronized（s1）{
s2.append（A”）；
synchronized（s2）{
s2.append（B”）；
System.out.print（s1）；
System.out.print（s2）；
}
}
}
}.start（）；
newThread（）{
publicvoidrun（）{
synchronized（s2）{
s2.append（C”）；
synchronized（s1）{
s1.append（D”）；
System.out.print（s2）；
System.out.print（s1）；
}
}
}
}.start（）；
}
}
Whichtwostatementsaretrue？（）
相关考题：
interfaceDeclareStuff{publicstaticfinalintEASY=3；voiddoStuff（intt）；}publicclassTestDeclareimplementsDeclareStuff{publicstaticvoidmain（String[]args）{intx=5；newTestDeclare（）.doStuff（++x）；}voiddoStuff（ints）{s+=EASY+++s；System.out.println（”s+s）；}}Whatistheresult？（）A.s14B.s16C.s10D.Compilationfails.E.Anexceptionisthrownatruntime.
publicclassX{publicstaticvoidmain(String[]args){strings=newstring(Hello”);modify(s);System.out.printIn(s);}publicstaticvoidmodify(Strings){s＋=world!”;}}Whatistheresult?() A.Theprogramrunsandprints“Hello”B.Anerrorcausescompilationtofail.C.Theprogramrunsandprints“Helloworld!”D.Theprogramrunsbutabortswithanexception.
publicclassfoo{staticStrings;publicstaticvoidmain(String[]args){system.out.printIn(s=”＋s);}}Whatistheresult?() A.Thecodecompilesand“s=”isprinted.B.Thecodecompilesand“s=null”isprinted.C.Thecodedoesnotcompilebecausestringsisnotinitialized.D.Thecodedoesnotcompilebecausestringscannotbereferenced.E.Thecodecompiles，butaNullPointerExceptionisthrownwhentoStringiscalled.
publicclassfoo{publicstaticvoidmain(String[]args){Strings;system.out.printIn(s=”＋s);}}Whatistheresult?() A.Thecodecompilesand“s=”isprinted.B.Thecodecompilesand“s=null”isprinted.C.Thecodedoesnotcompilebecausestringsisnotinitialized.D.Thecodedoesnotcompilebecausestringscannotbereferenced.E.Thecodecompiles，butaNullPointerExceptionisthrownwhentoStringiscalled.
publicclassX{publicstaticvoidmain(Stringargs){strings=newstring(Hello”);modify(s);System.out.printIn(s);}publicstaticvoidmodify(Strings){s＋=world!”;}}Whatistheresult?() A.Theprogramrunsandprints“Hello”B.Anerrorcausescompilationtofail.C.Theprogramrunsandprints“Helloworld!”D.Theprogramrunsbutabortswithanexception.
publicclassfoo{publicstaticvoidmain(Stringargs){Strings;system.out.printIn(s=”＋s);}}Whatistheresult?() A.Thecodecompilesand“s=”isprinted.B.Thecodecompilesand“s=null”isprinted.C.Thecodedoesnotcompilebecausestringsisnotinitialized.D.Thecodedoesnotcompilebecausestringscannotbereferenced.E.Thecodecompiles，butaNullPointerExceptionisthrownwhentoStringiscalled.
下列程序的输出结果是( )。 public class Test { public static void main (String[] args) { String s="hello"； s.replace ('r','m')； System.out.println(s)； } }A．helloB．HELLOC．hemmoD．HEMMO
1、写出以下程序的运行结果？ public class Test{ public static void main（String argv[]){ String s = new String（"hello"); myMethod（s); System.out.print（"s=" + s); } public static void myMethod（String s){ s = s + "!"; } }A．s=hello!B．s=helloC．hello!D．hello
写出以下程序的运行结果？ public class Test{ public static void main（String argv[]){ String s = new String（"hello"); myMethod（s); System.out.print（"s=" + s); } public static void myMethod（String s){ s = s + "!"; } }A．s=hello!B．s=helloC．hello!D．hello