Java samples

Environment setup

http://www.codejava.net/java-core/how-to-write-compile-and-run-a-hello-world-java-program-for-beginners

Sample 1

• Read a file line by line
• Split that line to find a string
• Compare that string with the string users has inputted
• Result
  filename.txt

  [html]
  Southern Cross Station^1^3501^Spencer Street^Melbourne
  William Street^3^3503^Collins Street^Melbourne
  Elizabeth Street^5^3505^Collins Street^Melbourne
  [/html]

  Tram.java

  [java]
  import java.util.Scanner;
  import java.io.IOException;
  import java.io.File;
  import java.io.BufferedReader;
  import java.io.FileReader;

  public class Tram {
  public static void main(String[] args) {

  // Print out ‘Enter filename’
  System.out.println("Enter filename >> ");
  Scanner scanner = new Scanner(System.in);
  String fileName = scanner.nextLine();

  // Print out ‘Enter tram tracker id’
  System.out.println("Enter tram tracker id >> ");
  String trackerId = scanner.nextLine();

  // Get folder path
  String dir = System.getProperty("user.dir");
  String filePath = dir + "\\" + fileName;
  System.out.println(filePath);

  // Check if file exist or not
  File file = new File(filePath);
  if(!file.exists() || file.isDirectory()) {
  // do something
  System.out.println("File not found");
  } else
  {
  // Read the file line by line
  try (BufferedReader br = new BufferedReader(new FileReader(filePath))) {
  String line;
  Boolean isFound = false;
  while ((line = br.readLine()) != null) {
  String[] sections = line.split("\\^");
  String trackerIdFound = sections[2];
  if (trackerId.equals(trackerIdFound)) {

  // Found trackerId
  isFound = true;
  System.out.println("Tracker id: " + trackerId);
  System.out.println("Stop number: " + sections[1]);
  System.out.println("Road: " + sections[3]);
  System.out.println("Cross Street: " + sections[0]);
  System.out.println("Suburb: " + sections[4]);

  break;
  }
  }

  if (isFound == false) {
  System.out.println("That tracker id was not found");
  }
  } catch (IOException e) {
  e.printStackTrace();
  }
  }
  }
  }

  [/java]