java.util.scanner

here's a code about depth first search in graphs. who knows why bufferedReader class were used in this code? and why nextInt function not used instead? what is its privilege? is it for speeding up processing? Thanks :) import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; class Graph { int g[][]; int v,e; int visited[]; void createGraph()throws IOException { int a,b; BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); System.out.print("\n Enter Number Of Vertices = "); v=Integer.parseInt(br.readLine()); System.out.print("\n Enter

I am trying to write this method, which keeps reading from the user, until the word "exit" is inputted. I tried with a break and for loop; it didn't work. I was trying with while, but it does not stop even when the word "exit" is inputted. Any ideas how to fix this? Thanks. public void read(Scanner scanner){ while(3<4){ String in = scanner.nextLine(); Scanner scanner_2 = new Scanner(in); String name = null; if(scanner_2.hasNext()){ //create and add the user to the user container class name = scanner_2.next(); System.out.println(name); } if(name == exit) //stop or break the while loop } } name

I have a text file that reads: Description|SKU|Retail Price|Discount Tassimo T46 Home Brewing System|43-0439-6|17999|0.30 Moto Precise Fit Rear Wiper Blade|0210919|799|0.0 I've got it so that I read everything, and it works perfectly, save for the fact that it reads the first line, which is a sort of legend for the .txt file, which must be ignored. public static List<Item> read(File file) throws ApplicationException { Scanner scanner = null; try { scanner = new Scanner(file); } catch (FileNotFoundException e) { throw new ApplicationException(e); } List<Item> items = new ArrayList<Item>(); try

I have 100 millions of records in JSON file, need an efficient and fastest method to read the array of arrays from a JSON file in java . JSON file look like: [["XYZ",...,"ABC"],["XYZ",...,"ABC"],["XYZ",...,"ABC"],...,["XYZ",...,"ABC"], ["XYZ",...,"ABC"],["XYZ",...,"ABC"],["XYZ",...,"ABC"],...,["XYZ",...,"ABC"], ... ... ... ,["XYZ",...,"ABC"],["XYZ",...,"ABC"],["XYZ",...,"ABC"]] I want to read this JSON file line by line as: read first: ["XYZ",...,"ABC"] then: ["XYZ",...,"ABC"] so on:' ... ... ... ["XYZ",...,"ABC"] How do I read a JSON file like this, I know it does not completely look like a