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col1 col2 col3 abc 22 rome xyz 11 spain rome 12 uae want read text file, every column values individual objects compare between 2 object of column.
here code, suggest proper modification
/* * change license header, choose license headers in project properties. * change template file, choose tools | templates * , open template in editor. */ package javaapplication3; import java.util.*; import java.io.*; public class javaapplication3 { /** * @param args command line arguments */ public static void main(string[] args) throws filenotfoundexception { try{ scanner s = new scanner(new filereader("exemple_1.txt")); list<string> ls1 = new arraylist<string>(); /* store closedset values */ list<string> ls2 = new arraylist<string>(); /* store support values */ list<string> ls3 = new arraylist<string>(); /* store objectlist vaules */ while(s.hasnext()){ string[] str = s.next().split("\t"); string s1 = str[0].trim(); /* takes closedset vaues read */ string s2 = str[1].trim(); /* takes support vaues read */ string s3= str[2].trim(); /* takes objectlist vaues read */ if(!"col1".equals(s1)){ /* skip first line */ ls1.add(s1); } if(!"col2".equals(s2)){ /* skip first line */ ls2.add(s2); } if(!"col3".equals(s3)){ /* skip first line */ ls3.add(s3); } } system.out.println(ls2); /* print support values */ }catch (filenotfoundexception e) { e.printstacktrace(); } /* catch (ioexception ex) { ex.printstacktrace(); } */ } }
if want read file line line, use s.hasnextline() , s.nextline(). also, equals(...) case sensitive, you've used !"col1".equals(s1) instead of !"col1".equals(s1)
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