SOME COMPUTER STUFF ON C,JAVA,TALLY,BCA,SOLVED PAPERS

import java.io.*; import java.lang.*; class Ser { public static void main(String args[])throws Exception { DataInputStream dd= new DataInputStream(System.in); System.out.println("enter a string "); String str=dd.readLine(); System.out.println("enter a character"); char ch=(char)System.in.read(); s o =new s(); if(o.extract(str,ch)==true) o.display(); else System.out.println("NOT FOUND"); } } class s { String s2=""; public boolean extract(String str,char ch2) { str=str+" "; String s3=""; boolean b=false; int i; for(i=0;i<str.length();i++) { char ch= str.charAt(i); if(ch != ' ') s3=s3+ch; else { if(s3.charAt(0)==ch2)    { b=true; s2=s2+" "+s3;     } s3="";  } } return b; } public void display() { System.out.println(s2); } }