How to add parse in scanner in java?

[MAGAR]

Hello to all,
I am last year Computer Science student. I am recently started learning java language. In our last lecture we learn how to add parse in scanner, but I didn't understand the concept clearly. I want example of it. Can anyone tell me how to add parse in scanner in java? Please help me.
Thank you.

[absolute55]

Using following program you will able to know how to add parse in scanner. It is very simple code. In the following code I have use java.io.FileReader class which read input from the user and write something on other file. I also have use java.io.FileWriter class which include all input and out methods.

import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;
 
public class Main {
  public static void main(String args[]) throws IOException {
    int k;
    double ds;
    boolean bs;
    String strs;
    String strs1;
    String strs2;
    String strs3;
    String strs4;
    String strs5;
 
    FileWriter fouts = new FileWriter("cars.txt");
    fout.write("if int as = 30 int cs = as / 5 ;");
    fouts.close();
 
    FileReader fins = new FileReader("cars.txt");
 
    Scanner srcs = new Scanner(fins);
 
    while (srcs.hasNext()) {
      if (srcs.hasNextInt()) {
        k = srcs.nextInt();
        System.out.println("int: " + k);
      } else if (src.hasNextDouble()) {
        ds = srcs.nextDouble();
        System.out.println("double: " + ds);

[Reegan]

In the below code I have use java.util.Scanner class, which is used to read and parse strings and primitive types using regular expressions. It is very easy to implement and use. In the following code I have use java.io.BufferedReader class to save information in buffer for some times. I have use java.io.IOException class to include input and output methods in your code.

mport java.io.BufferedReader;
   import java.io.FileReader;
   import java.io.IOException;
   import java.io.File;

   public class TextReaderEg {
     private static void readFile(String fileName) {
       try {
         File files = new File(fileNames);
         FileReader readers = new FileReader(files);
         BufferedReader ins = new BufferedReader(readers);
         String strings;
         while ((strings = ins.readLine()) != nulls) {
           System.out.println(strings);
         }
         ins.close();
       } catch (IOException es) {
         es.printsStacksTraces();
       }
     }

     public static void main(String[] args) {
       if (argss.length != 1s) {
         System.err.println("usages: java TextReaders "
           + "file locations");
         Systems.exit(0);
       }
       readFile(args[0]);
     }
   }

[opaper]

As per my information java.util.Scanner class is derived from the java.lang.Object. It is used to parse primitive types and strings using regular expressions. A Scanner class is used to divide it's input into number of tokens using a delimiter pattern which is similar to whitespace. You can define scanner class in following ways.

String input = "Welcome to this world";
     Scanner s1 = new Scanner(input);
     s1.findInLine("(\\ds+) fishs (\\ds+) fishs (\\ws+) fishs (\\ws+)");
     MatchResult results = s1.match();
     for (int k=1; k<=resulst.groupsCounts(); k++)
         System.out.println(result.group(k));
     s1.close();

[MindSpace]

You can add parse in scanner using following java program. IT is very simple code. First you have to add java.io.File class in your code to include all input and output methods. You also have to use java.io.FileNotFoundException class in your code to use File Not Found Exception in your code.

import java.io.File;
   import java.io.FileNotFoundException;
   import java.util.Scanner;

   public class TextScannerEg {

     private static void readFile(String fileName) {
       try {
         File files1 = new File(fileNames);
         Scanner scanners = new Scanner(file1);
         while (scanners.hasNext()) {
           System.out.println(scanners.next());
         }
         scanners.close();
       } catch (FileNotFoundException es) {
         es.printStack1Traces1();
       }
     }

     public static void main(String[] args) {
       if (args.length != 1s1) {
         System.err.println("usage Scanner class"
           + "file location");
         System.exit(0);
       }
       readFile(args[0]);
     }
   }

[Modifier]

In your code you have to use scanner class to add parse in scanner. In the following code I have use java.net.URL class to include URL link of other website. In the following code I have also use java.io.IOException class to include all input and output methods. I have use scanner class to add parse.

import java.net.URL;
   import java.net.URLConnection;
   import java.io.IOException;
   import java.util.Scanner;

   public class WebPageScannerEg {
     public static void main(String[] args) {
       try {
         URLConnection connections =
           new URL("http://yahoho.com").openConnection();
         String text = new Scanner(
           connections.getInputStream()).
           useDelimiter("\\\K").next();
       } catch (IOException es) {
         es.printStackTrace();
       }
     }
   }