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Java Exercises: Reads a date and prints the day of the date

Java Basic: Exercise-225 with Solution

Write a Java program to that reads a date (from 2004/1/1 to 2004/12/31) and prints the day of the date. Jan. 1, 2004, is Thursday. Note that 2004 is a leap year.

Pictorial Presentation:

Java Basic Exercises: Reads a date and prints the day of the date.

Sample Solution:

Java Code:

import java.util.*;
 
class Main {
 
    static int days[] = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    static String name[] = {"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"};
 
    public static void main(String args[]){
        Scanner in = new Scanner(System.in);
		System.out.println("Input month and date(o o to exit)");
		
        for(;;){
            int m=in.nextInt(), d=in.nextInt();
            if(m==0&&d==0) break;
            System.out.println(solve(m,d));
        }
    }
 
    static String solve(int month, int date){
        int cur = 3;
		System.out.println("Name of the day:");
        for(int i=0; i<month-1; i++) cur += days[i];
        cur += date-1;
        return name[cur%7];
    }
 
}

Sample Output: 

Input month and date(o o to exit)
9
15
Name of the day:
Wednesday

Flowchart:

Flowchart: Reads a date and prints the day of the date.

Java Code Editor:

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Java: Tips of the Day

Java: Anagrams

Generates all anagrams of a string.

public static List<String> anagrams(String input) {
    if (input.length() <= 2) {
        return input.length() == 2
                ? Arrays.asList(input, input.substring(1) + input.substring(0, 1))
                : Collections.singletonList(input);
    }
    return IntStream.range(0, input.length())
            .mapToObj(i -> new SimpleEntry<>(i, input.substring(i, i + 1)))
            .flatMap(entry ->
                    anagrams(input.substring(0, entry.getKey()) + input.substring(entry.getKey() + 1))
                            .stream()
                            .map(s -> entry.getValue() + s))
            .collect(Collectors.toList());
}

Ref: https://bit.ly/3rvAdAK