java认证试题：Java认证模拟题及分析(5)

会计考友

　question 56) 　　you are using the gridbaglayout manager to place a series of buttons on a frame. you want to make the size of one of the buttons bigger than the text it contains. which of the following will allow you to do that?
8 h9 G0 \6 r( T, e/ j3 K　　1) the gridbaglayout manager does not allow you to do this
　　2) the setfill method of the gridbaglayout class
) T7 t( w4 s7 P) y　　3) the setfill method of the gridbagconstraints class
　　4) the fill field of the gridbagconstraints class
　　answer to question 56
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; X2 O) ]! Z  e3 O% o! i　　question 57)
　　which of the following most closely describes a bitset collection?
　　1) a class that contains groups of unique sequences of bits
　　2) a method for flipping individual bits in instance of a primitive type
　　3) an array of boolean primitives that indicate zeros or ones
　　4) a collection for storing bits as on-off information, like a vector of bits
　　answer to question 57
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2 J( E# w  ]0 N* h% ]5 c, J" F: p　　question 58)
　　you have these files in the same directory. what will happen when you attempt to compile and run class1.java if you have not already compiled base.java
　　//base.java
: H. H- P" W6 \8 F8 v2 {
　　package base;

会计考友

</p>　　class base{
: G) M! u8 P+ m* j　　protected void amethod(){
　　system.out.println('amethod');
　　}//end of amethod
　　}//end of class base
　　package class1;
3 x  s( S/ h. r  K1 K' a  `　　//class1.java
/ w* N# D) o& b2 E# K　　public class class1 extends base{
" O1 x  x' n( P+ D& p) W8 P  P8 ]　　public static void main(string argv[]){
$ M% `: T1 C% H　　base b = new base();
　　b.amethod();
　　}//end of main
　　}//end of class1
　　1) compile error: methods in base not found
" h$ {% o' o3 Q: k　　2) compile error: unable to access protected method in base class
　　3) compilation followed by the output 'amethod'
1 Y7 U4 k5 k/ N; _( W　　4)compile error: superclass class1.base of class class1.class1 not found
　　answer to question 58
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8 e2 G, R' i" f) ^1 |# i　　question 59)
　　what will happen when you attempt to compile and run the following code
　　class base{
　　private void amethod(int ibase){
　　system.out.println('base.amethod');