JAVA题库:格林模拟试题三（上）(6)

文章作者 100test 发表时间 2007:03:14 17:04:18
来源 100Test.Com百考试题网

question 18)

which of the following will compile without error?

1)

char c=1.
system.out.println(c>>1).

2)

integer i=integer("1").
system.out.println(i>>1).

3)

int i=1.
system.out.println(i<<<1).

4)

int i=1.
system.out.println(i<<1).

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question 19)

which of the following are true?

1) a component may have only one event listener attached at a time
2) an event listener may be removed from a component
3) the actionlistener interface has no corresponding adapter class
4) the processing of an event listener requires a try/catch block

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question 20)

which of the following are java keywords?

1) sizeof
2) main
3) transient
4) volatile

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question 21)

which of the following statements are true?

1) the default constructor has a return type of void
2) the default constructor takes a parameter of void
3) the default constructor takes no parameters
4) the default constructor is not created if the class has any constructors of its own.