java练习题201012.pdf
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1. Java A
A)SUN B)IBM C)Microsoft D)Borland
2. Java Applet A
A) Java B)
C) Java D)
3.Java B
A)Java -- ---
B)Java -- ByteCode--
C)Java --
D)Java -- --
4Java JDK java.exe B
AJava B Java
CJava D Java
5. D
A)2++ B)(a-b)++ C)++(a-b) D)++x
6.Java C
A)ASCII B)BCD C)Unicode D)ISD-Latin
7.Java s ( B )
A)s.length() B)s.length C)len(s) D)ubound(s)
8. ( C )
A)Java java txt
B)JDK java
C) Java
D)
9. D
A)char c= ; B)byte b=112; C)double d=35.6; D)float f=8.6;
10. D
A)int i=123a; B)byte b=512;
C)boolean bl=1; D)String str=null;
11. B
A)char c1= ; B)char c4= ; C)char c3= x; D)char c5=(char) 65;
12. A
String str= 123
int x=4,y=5;
Str=str+x+y;
System.out.println(str);
A)12345 B)
C)1239 D)123+4+5
13. (short)8/9.2*5 C
A)short B) int C) double D)float
14. int a=3,b=4,c=5, false D
A)a<b&&b<c B)a<=b C)a<(b+c) D)!(a<b)
15. b B
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