语句Print "The answer is:";20／4－2的结果为（)。A、The answer is 20／4－2B、The answe

现有两个文件:packageX;publicclassX{publicstaticvoiddoX(){System.out.print("doX")

现有:Strings="writealinetoafile";w.print(s+"\n");哪一个是对的?()

现有:1.classBook{2.privatefinalvoidread(){System.out.print("book");}3.}4.classPa

classMyThreadimplementsRunnable{2.publicvoidrun(){3.System.out.print("go");4.}

现有:classCat{Cat(intc){System.out.print("cat"+c+"");}}classSubCatexte

现有:classCat{Cat(intc){System.out.print{"cat"+c+"");}}classSubCatexte