单项选择题
A public member vairable called MAX_LENGTH which is int type， the value of the variable remains constant value 100. Use a short statement to define the variable.（）
A. public int MAX_LENGTH=100；
B. final int MAX_LENGTH=100；
C. final public int MAX_LENGTH=100；
D. public final int MAX_LENGTH=100；
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单项选择题
Amembervariabledefinedinaclasscanbeaccessedonlybytheclassesinthesamepackage.Whichmodifiershouldbeusedtoobtaintheaccesscontrol？（）
A. private
B. no modifier
C. public
D. protected -
多项选择题
public class Parent { public int addValue（ int a， int b） { int s； s = a+b； return s； } } class Child extends Parent { } Which methods can be added into class Child？（）
A. int addValue（ int a， int b ）{// do something...}
B. public void addValue （）{// do something...}
C. public int addValue（ int a ）{// do something...}
D. public int addValue（ int a， int b ）throws MyException {//do something...} -
单项选择题
Given the following code： public class Person{ int arr[] = new int[10]； public static void main（String a[]） { System.out.println（arr[1]）； } } Which statement is correct？（）
A. When compilation some error will occur.
B. It is correct when compilation but will cause error when running.
C. The output is zero.
D. The output is null.
