JAVA题库:格林模拟试题二(上)(6)

文章作者 100test 发表时间 2007:03:14 17:06:13
来源 100Test.Com百考试题网

question 17)

which statements are correct about the anchor field?

1) it is a field of the gridbaglayout manager for controlling component placement
2) it is a field of the gridbagconstraints class for controlling component placement
3) a valid setting for the anchor field is gridbagconstraints.north
4) the anchor field controls the height of components added to a container

question 18)

what will happen when you attempt to compile and run the following code?

public class bground extends thread{
public static void main(string argv[]){
                bground b = new bground().
                b.run().
        }
        public void start(){
                for (int i = 0. i <10. i  ){
                        system.out.println("value of i = "   i).
                }
        }
}

1) a compile time error indicating that no run method is defined for the thread class
2) a run time error indicating that no run method is defined for the thread class
3) clean compile and at run time the values 0 to 9 are printed out
4) clean compile but no output at runtime

question 19)

is the following statement true or false?
when using the gridbaglayout manager, each new component requires a new instance of the gridbagconstraints class.

1) true
2) false