Methods
- Which of these method return a pseudorandom number?
-
View Hint View Answer Discuss in Forum
NA
Correct Option: C
random()
- Which of these class contains all the methods present in Math class?
-
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NA
Correct Option: D
SystemMath class defines a complete set of mathematical methods that are parallel those in Math class. The difference is that the StrictMath version is guaranteed to generate precisely identical results across all Java implementations.
- What is the output of this program?
public class Result
{
public static void main(String args[])
{
Double num0 = new Double(260.0062);
Double num1 = new Double(260.0062123456);
try
{
int p = num1.compareTo(num0);
System.out.print(p);
}
catch(ClassCastException e)
{
System.out.print("Exception");
}
}
}
-
View Hint View Answer Discuss in Forum
NA
Correct Option: C
num1.compareTo() methods two double values, if they are equal then 0 is returned and if not equal then 1 is returned, here 260.0062 and 260.0062123456 are not equal hence 1 is returned and stored in p.
- What is the output of this program?
public class Result
{
public static void main(String args[])
{
Double num = new Double(260.00625023);
float p = num.floatValue();
System.out.print(p);
}
}
-
View Hint View Answer Discuss in Forum
NA
Correct Option: A
floatValue() converts the value of wrapper i into float, since float can measure till 5 places after decimal hence 260.00626 is stored in floating point variable p.
- What is the output of this program?
public class Result
{
public static void main(String args[])
{
Double num = new Double(260.062);
int p = num.intValue();
System.out.print(p);
}
}
-
View Hint View Answer Discuss in Forum
NA
Correct Option: B
num.intValue() method returns the value of wrapper i as a Integer. num is 260.062 is double number when converted to an integer data type its value is 260.
