Scan through lines Java

If you want to delete a line in a paragraph in java you can use java.util.Scanner;

In the below example, I scan through each line and check if a particular pattern occurs as the start of that line and delete that line.


import java.util.Scanner;
public class PatternFinder
{
    /**
     * @param args
     */
    public static void main(String[] args)
    {
        String a = "TEST/Line1" +
                   "\nTEST/Line3  TESTER/123456" +
                   "\nthis is TESTER/Line4" +
                   "\nCON/Line2  TESTER/123456 " +
                   "\nTEST/Line3  TESTER/123456";
        System.out.println("Input String :\n****************************\n" + a +"\n***************************");
        Scanner scanner = new Scanner(a);
        String b = "";
        try{
            while(scanner.hasNextLine())
            {
                String line = scanner.nextLine();
                if(!containsElmntWithStartPtrn(line,"TEST/" ,"TESTER/")){
                    b= b + line +"\n";
                }
            }
            System.out.println("Output String :\n****************************\n" + b.trim() +"\n***************************");
        }catch (Exception e){
            System.out.println("Error in PatternFinder" + e);
        }finally {
            scanner.close();
        }
      
    }
  
    public static boolean containsElmntWithStartPtrn(String line, String startStr,String elementStr)
    {
        boolean contains = false;
        if((line.indexOf(startStr) != -1) && line.indexOf(startStr) < startStr.length()){
            if(line.contains(elementStr)){
                contains = true;
            }
        }
        return contains;
    }
}