What is nested loop in Java?
A nested loop is a (inner) loop that appears in the loop body of another (outer) loop. The inner or outer loop can be any type: while, do while, or for. For example, the inner loop can be a while loop while an outer loop can be a for loop.
How do you draw a diamond shape in Java?
The program output is also shown below.
- import java.util.Scanner;
- public class Diamond.
- {
- public static void main(String args[])
- {
- int n, i, j, space = 1;
- System. out. print(“Enter the number of rows: “);
- Scanner s = new Scanner(System. in);
How many nested for loops can you have in Java?
A method in Java can be up to a maximum of 64KB. So, you can have as many nested loops as long as they are under the 64KB of memory. There is no limit as such, however there is a limit to the size of a method. This can be a good read.
What is the diamond problem in Java?
The diamond problem is a common problem in Java when it comes to inheritance. Multi-level inheritance allows a child class to inherit properties from a class that can inherit properties from some other classes. For example, class C can inherit its property from B class which itself inherits from A class.
What are nested loops used for?
Nested loops are useful when for each pass through the outer loop, you need to repeat some action on the data in the outer loop. For example, you read a file line by line and for each line you must count how many times the word “the” is found.
Can you have a nested for each loop in Java?
for-each loop can be nested like normal for loop. Here is the example for Nested for-each loop which iterates two dimensional array.
What is wrong with nested loops?
Nested loops are frequently (but not always) bad practice, because they’re frequently (but not always) overkill for what you’re trying to do. In many cases, there’s a much faster and less wasteful way to accomplish the goal you’re trying to achieve.
Why multiple inheritance is not supported in Java?
Java does not support multiple inheritance because of two reasons: In java, every class is a child of Object class. When it inherits from more than one super class, sub class gets the ambiguity to acquire the property of Object class.. In java every class has a constructor, if we write it explicitly or not at all.
Why are pointers not used in Java?
So overall Java doesn’t have pointers (in the C/C++ sense) because it doesn’t need them for general purpose OOP programming. Furthermore, adding pointers to Java would undermine security and robustness and make the language more complex.