importjava.util.Scanner;publicclassPattern2{publicstaticvoidmain(String[]args){Scanner sc=newScanner(System.in);System.out.print("Enter number of rows: ");introws=sc.nextInt();System.out.println("your pattern is: -");for(inti=1;i<=rows;i++){for(intj=1;j<=i;j++){System.out.print...
System.out.println("Printing Pattern 1\n"); printPattern1(rows); } } Notice that I have created a utility function for common string printing task. If you can divide your program into short reusable functions, then it shows that you are not only looking to write the program but also wan...
The Adapter design patternin Java, also known as the Wrapper pattern, is another very useful GOF pattern that helps bridge the gap between two classes in Java. According to the Gang of Four pattern list, Adapter is a structural pattern, much like the Proxy, Flyweight, Facade, andDecorator p...
The observer design patternin Javais a very important pattern, as the name suggests, it is used to observe things. Suppose we want to be notified of changes in a particular object, then we observe that object and notify the changes. The object being observed is called a Subject, and the ...
Noteworthy is that both of the problems were taken from real job interviews, and they are included in the Leetcode Top Interview Questions list. Subsets Problem description Given an integer array nums of unique elements, return all possible subsets (the power set). The solution set must not ...
Patternand subclassing is that you can decorate any class that implements an interface with a single class. Say I wanted to give myself a java.util.Map that printed a message whenever I added or removed a key. If I only ever actually used java.util.HashMapI could just create PrintingMap...
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1) A Storm of Swords, George R. R. Martin, 1216 3) The Alchemist, Paulo Coelho, 197 5) The Pilgrimage, Paulo Coelho, 288 The following code prints only even lines from the file. [jerry]$ sed -n '2~2 p' books.txt When the above code is executed, it will produce the following...