ibm笔试题(3)

System.out.println("value = " + switchIt(4)); 
} 
public static int switchIt(int x) { 
int j = 1; 
switch (x) { 
case 1: j++; 
case 2: j++; 
case 3: j++; 
case 4: j++; 
case 5: j++; 
default: j++; 
} 
return j + x; 
} 
} 
输出结果是什么? 
A. value = 3 
B. value = 4 
C. value = 5 
D. value = 6 
E. value = 7 
F. value = 8 
答案：F

6. 以下数组的定义，哪三条是正确的? 
A. public int a [] 
B. static int [] a 
C. public [] int a 
D. private int a [3] 
E. private int [3] a [] 
F. public final int [] a 
答案：A,B,F

7. 如下代码： 
class Super { 
public Integer getLenght() { return new Integer(4); } 
} 

public class Sub extends Super { 
public Long GetLenght() { return new Long(5); } 
public static void main(String[] args) { 
Super sooper = new Super(); 
Sub sub = new Sub(); 
System.out.println(sooper.getLenght().toString() + "," + 
sub.getLenght().toString() ); 
} 
} 
输出是什么?