格林模拟试题一（上）(8)

 question 24)
1) system.out.println(math.floor(-4.7)); 
3) system.out.println(math.ceil(-4.7)); 
question 25)
long nine=new long (9);
int i=1;
1) 19 followed by 20 
3) compile time error 
question 26)
int ibegin=1;
system.out.println(s.substring(ibegin,iend));

1) bic 
3) icy 

if you wanted to find out where the position of the letter v (ie return 2) in the string s containing "java",which of the following could you use?

1) mid(2,s); 
3) s.indexof('v'); 
question 28)

given the following declarations

string s1=new string("hello")
string s3=new string();

which of the following are legal operations?

1) s3=s1 + s2; 
3) s3=s1 & s2;