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2 1 2 1
2.5 3.125 2.5 3.125
(15)switch语句中表达式(expression)的值不允许用的类型是
A) byte
B) int
C) boolean
D) char
(16)下列语句能给数组赋值而不使用for循环的是
A) myArray{[1]="One";[2]="Two";[3]="Three";}
B) String s[5]=new String[]{"Zero", "One", "Two", "There", "Four"};
C) String s[]=new String[]{"Zero", "One", "Two", "There", "Four"};
D) String s[]=new String[]=|"Zero", "One", "Two", "There", "Four"};
(17)Swing与AWT相比新增的布局管理器是
A) CardLayout B) CardLayout C) CardBagLayout D) BoxLayout
(18)下列语句中正确的是
A) System. out. println(1+'1'); B) int i=2+"2";
C) Sting s="on"+'ong'; D) byte b=257;
(19)下列关键字中可以表示常量的是
A) final B) default
C) private D) transient
(20)在Java语言中,被称为内存分配的运算符是
A) new B) instance of C) [] D) ()
(21)阅读下面程序
pubic class Cycle{
public static void main(String args[]){
System. out. println(args[0]);
在命令行中输入java Cycle one two,该程序输出结果是
A) Cycle B) one
C) two D) 上述A、B、C、均不对
(22)阅读下面程序
public class My Val{
public static void main(String args[]){
My Val m=new My Val();
m. amethod();
}
public void amethod(){
boolean b[]=new Boolean[5];
}
}
程序编译或运行结果是
A) 1 B) null C) " " D) 编译不能过
(23)阅读下面求质数的程序
import java. lang. Math. * ;
&