Concept explainers
(a)
Exception handling:
In Java, the exception is an object used to signal the unexpected error occurred during a program execution.
- Exception is the error, which arises at run time and such errors can be handled in Java by exception handling.
Runtime exception:
- The runtime exceptions are indicated in RuntimeException class that defines the errors in programs such as out of bounds array, numeric errors, and so on.
- Some of runtime exceptions such as,
- ArithmeticException
- NullPointerException
- IndexOutOfBoundsException
- IllegalArgumentException
(b)
Explanation of Solution
Output of code:
The given code is,
//Class definition
class Test
{
// Main function
public static void main(String args[])
{
//Declare the array variable
int[] list = new int[5];
//Display the result
System.out.println(list[5]);
}
}
Explanation:
In the above code,
- In t...
(c)
Explanation of Solution
Output of code:
The given code is,
//Class definition
class Test
{
// Main function
public static void main(String args[])
{
//Declare the string variable
String s = "abc";
//Display the result
System.out.println(s.charAt(3));
}
}
Explanation:
In the above code,
- In the main function,
- Declare and i...
(d)
Explanation of Solution
Output of code:
The given code is,
//Class definition
class Test
{
// Main function
public static void main(String args[])
{
//Create the object for Object class
Object o = new Object();
//Initialize the object to string variable
String d = (String)o;
}
}
Explanation:
In the above ...
(e)
Explanation of Solution
Output of code:
The given code is,
//Class definition
class Test
{
// Main function
public static void main(String args[])
{
//Create the object for Object class
Object o = null;
//Convert "o" into string and then display it
System.out.println(o...
(f)
Explanation of Solution
Output of code:
The given code is,
//Class definition
class Test
{
// Main function
public static void main(String args[])
{
//Divide the 1.0 by 0 and then display the result
System.out.println(1.0/0);
}
}
Explanation:
In the above...
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