Java
璇曢
1) java
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main
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a
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static void main
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String[] args
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b
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public void main
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String[] args
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c
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public static void main
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String[]s
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d
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public static void main
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String[] args
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2
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java
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public byte count
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byte b1
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byte b2
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{
return______
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}
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a
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(byte) (b1-b2)
b
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(byte) b1-b2
c) b1-b2
d) (byte) b1/b2
3
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鍦?/p>
Java
涓紝
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com.db
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com.util
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a
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protected
b
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private
c
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public
d
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friendly
4
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Java
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(
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)
a) String s= "join"+ "was"+ "here";
b) String s= "join"+3;
c) int a= 3+5
d) float f=5+5.5;
5)
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Java
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JFrame
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FlowLayout
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a
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jFrame.setLayout
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new FlowLayout()
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;
b) jFrame.addLayout
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new FlowLayout()
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c
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jFrame.setFlowLayout()
d
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jFrame.addFlowLayout()
6
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java
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锛堥�夋嫨涓�椤癸級
String s
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null
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s.concat
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"abc"
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a
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ArithmeticException
b
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NullPointerException
c
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IOException
d
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EOFException
7)
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java
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/
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锛堥�夋嫨涓�椤癸級
a
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ArrayList
b) HashSet