Write a java program to store some text into a disk file

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class StoreTextToFile {
public static void main(String[] args) throws IOException {
File file = new File("textfile.txt");
FileWriter writer = new FileWriter(file);
writer.write("This is some random text");
writer.close();
}
}

//Write a java program to store some text into a disk file

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;

public class WriteToFile {
public static void main(String[] args) {
BufferedWriter bw = null;
try {
String text = "This is some text that will be written to the disk file";
FileWriter fw = new FileWriter("myFile.txt");
bw = new BufferedWriter(fw);
bw.write(text);
System.out.println("Text written to file successfully!");
} catch (IOException ioe) {
ioe.printStackTrace();
} finally {
try {
if (bw != null)
bw.close();
} catch (Exception ex) {
System.out.println("Error in closing the BufferedWriter" + ex);
}
}
}
}

a java program to store text in hard-disk

import java.io.*;

public class TextStorage {
public static void main(String[] args) {
String str = "This is a sample text to be stored in hard-disk";

try {
FileWriter writer = new FileWriter("text.txt");
writer.write(str);
writer.close();
}
catch (IOException e) {
e.printStackTrace();
}
}
}

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0 discussions while firing.

And you expect the employee to be loyal?

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ALGORITHM YOU SHOULD KNOW for PREPARING SYSTEM DESIGN INTERVIEW 💡

🔺REQUIREMENTS :-
KNOW WHEN TO USE
KNOW HOW IT WORKS

◾1) BLOOM FILTER
It is a data structure designed to tell you, rapidly and memory-efficiently, whether an element is present in a set.
- use case :: Build a Web crawler

◾2) FRUGAL STREAMING
It uses only one unit of memory per group to compute a quantile for each group.
-use case :: Find the nth percentile of the data stream.

◾3) GEOHASH/ S2 GEOMETRY
A collection of efficient yet exact mathematical predicates for testing relationships among geometric primitives.
-use case :: Location-based search results with DynamoDb and Geohash.

◾4) HYPERLOGLOG
It is an algorithm for the count-distinct problem, approximating the number of distinct elements in a multiset.
-use case :: privacy-preserving traffic heat map for the city.

◾5) LEAKY BUCKET/ TOKEN BUCKET
A mechanism to control the amount and the rate of the traffic sent to the network.
-use case :: Design a scalable rate-limiting algorithm.

◾6) LOSSY COUNT
It is used to identify elements in a data stream whose frequency count exceeds a user-given threshold.
-use case :: Frequency count over the data streams.

◾7) OPERATIONAL TRANSFORMATION
It is used for supporting a range of collaboration functionalities in advanced collaborative software systems.
-use case :: Handling editing collision in Google docs.

◾8) QUADTREE/ RTREE
It is a two-dimensional analog of octrees and is most often used to partition a two-dimensional space by recursively subdividing it into four quadrants or regions.
-use case :: Find nearby interest points

◾9) RAY CASTING
It is the most basic of many computer graphics rendering algo that uses geometric algo of ray tracing.
-use case :: Using longitude and latitude, return the Country of the point.

◾10) REVERSE INDEX
It is an index of keywords that stores records of documents that contain keywords in the list.
-use case: Building a complete Tweet index.

◾11) RSYNC ALGORITHM
Used for reducing the cost of a file transfer by avoiding the transfer of blocks that are already at the destination.
-use case :: Streaming file Sync

◾12) TRIE ALGORITHM
Trie is an efficient information reTrieval data structure. Using Trie, search complexities can be brought to optimal limit (key length)
-use case :: Autocomplete features using Trie

13) STRING BUFFER
-use case ::  Banking transactions because it follows thread synchronisation

13) STRING BUILDER
-use case ::  BOOKMYSHOW OR IRCTC ticket booking because it NOT following thread synchronisation


collab credit - windsoon / ansh /Aman

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public class Swastik {
public static void main(String...args){
int n=9;
int mid=(n+1)/2;
for(int i=1 ; i<=n ; i++) {
for(int j=1 ; j<=n ; j++) {
if( j==mid i==mid (i==1 && j>mid) (i<= mid && j==1) (i == n && j<=mid) || (i>= mid && j==n))
System.out.print("*");
else
System.out.print(" ");
}
System.out.println();
}
}
}

import java.util.Scanner;

public class kShapeAlphabets1 {

private static Scanner sc;

public static void main(String[] args) {

sc = new Scanner(System.in);
int i, j, alphabet;

System.out.print("Enter K Shape Alphabets Pattern Rows = ");
int rows = sc.nextInt();

System.out.println("Printing K Shape Alphabets Pattern");

for (i = rows - 1; i >= 0; i-- )
{
alphabet = 65;
for (j = 0 ; j <= i; j++ )
{
System.out.print((char)(alphabet + j) + " ");
}
System.out.println();
}

for (i = 1 ; i < rows; i++ )
{
alphabet = 65;
for (j = 0 ; j <= i; j++ )
{
System.out.print((char)(alphabet + j) + " ");
}
System.out.println();
}
}
}