文档介绍：。1234inti=0;Integerj=newInteger(0);(i==j);((i));  ,,,,。lassExample{Stringstr=newString("hello");char[]ch={'a','b'};publicstaticvoidmain(Stringargs[]){Exampleex=newExample();(,);(+"and");();}1011121314publicvoidchange(Stringstr,charch[]){str="testok";ch[0]='c';}}  。lassTestClass{privatestaticvoidtestMethod(){("testMethod");}publicstaticvoidmain(String[]args){((TestClass)null).testMethod();}}  ,运行异常,,运行异常,,运行异常,,运行异常,,(),执行后的结果是()=();("name",null);("name","Jack");(());  ,执行后的结果是()lassTest{publicstaticvoidmain(String[]args){Objecto=newObject(){publicbooleanequals(Objectobj){returntrue;}};(("Fred"));}}  : 1byteb1=1,b2=2,b3,b6;2345finalbyteb4=4,b5=6;b6=b4+b5;b3=(b1+b2);(b3+b6);  关于上面代码片段叙述正确的是()::b6=b4+:b3=b1+()lassTest{publicintadd(inta,intb){try{returna+b;}catch(Exceptione){("catch语句块");}finally{("finally语句块");}return0;131415161718}publicstaticvoidmain(Stringargv[]){Testtest=newTest();("和是:"+(9,34));}}  ,和是:,和是::43,()lassTest{publicstaticvoidmain(String[]args){StringBuffera=newStringBuffer("A");StringBufferb=newStringBuffer("B");operator(a,b);(a+","+b);}publicstaticvoidoperator(StringBufferx,StringBu